190 results about "Poly(butylene succinate)" patented technology

The invention discloses a degradable bamboo fiber express packaging bag and a preparation method thereof, and belongs to the technical field of express packaging. The packaging bag is prepared from, by mass, 32-42 parts of pretreated bamboo fibers, 22-28 parts of poly (butylene succinate), 9-14 parts of modified nano calcium carbonate, 12-16 parts of polycaprolactone, 6-11 parts of acetylated chitosan and the like, and the key raw materials are all treated through an exclusive pretreatment or modification process. The preparation method comprises the steps of raw material plasma activation, segmented high-speed mixing, vacuum drying, precise-parameter twin-screw extrusion granulation, secondary drying, precise film blowing, high-precision heat-sealing bag making and the like, and the technological parameters of all the steps are clear. The product disclosed by the invention can be efficiently degraded in a natural environment, has excellent tensile resistance, puncture resistance and impact resistance, is stable and controllable in processing process, and is adaptive to actual requirements of express packaging and industrial batch production.

The invention discloses an anti-shrinkage light, soft and elastic sole foaming material and a preparation method thereof, and belongs to the technical field of footwear products. The light, soft and elastic sole foaming material is formed by chemically foaming an EVA (Ethylene Vinyl Acetate) composite raw material, the EVA composite raw material is prepared from 50 to 70 parts of EVA, 20 to 40 parts of olefin thermoplastic elastomer, 10 to 20 parts of styrene elastomer, 1.5 to 3 parts of maleic anhydride grafted ethylene-octylene copolymer compatilizer, 0.4 to 0.8 part of peroxide cross-linking agent, 3 to 4 parts of foaming agent, 1 to 1.5 parts of zinc oxide, 1 to 1.5 parts of polyethylene wax substance and 0.5 to 1.5 parts of poly (butylene succinate). 0.3 to 1 part of polyamide 12 microspheres and 2 to 3 parts of nano montmorillonite. The foaming material can resist shrinkage when being used as a shoe sole part, and has good rebound performance and the like, so that the high-quality requirement of sneakers, the mass production stability and the like are met.

The present disclosure relates to a biodegradable multilayer film comprising stacked on each other in the following order: a) a first outer layer comprising a first polymer selected from the group consisting of poly (butylene adipate-co-terephthalate) (PBAT), poly (butylene succinate) (PBS), poly (butylene succinate-co-adipate) (PBSA), and mixtures thereof; b) a core layer comprising a blend of thermoplastic starch (TPS) and polybutylene adipate terephthalate (PBAT); c) a second outer layer comprising a second polymer selected from the group consisting of poly (butylene adipate-co-terephthalate) (PBAT), poly (butylene succinate) (PBS), poly (butylene succinate-co-adipate) (PBSA), and mixtures thereof. The present disclosure also relates to a disposable bag, a bioreactor and a container suitable for mixing, packaging, storing or transporting biopharmaceutical substances, wherein the disposable bag, bioreactor and container comprise the biodegradable multilayer film.

The invention relates to the field of textile materials, and discloses a multi-thread elastic knitted fabric and a preparation method thereof.The multi-thread elastic knitted fabric is prepared from, by weight, 30 parts of ternary polymerization elastic fibers; 70 parts of modified bamboo fiber; the ternary copolymerized elastic fiber is prepared from the following raw material components in parts by weight: 28-32 parts of polylactic acid; 38 to 42 parts of polytrimethylene terephthalate; 28 to 32 parts of poly (butylene succinate); 1 to 3 parts of graphene nanosheets; 0.5 to 1.5 parts of epoxidized soybean oil; 2 to 4 parts of beta-cyclodextrin; the modified bamboo fibers are subjected to enzymatic treatment, silane coupling agent modification, dopamine coating treatment and ultrasonic treatment. Through micro gradient structure design and multi-step functionalization treatment of the ternary polymerization elastic fibers and the modified bamboo fibers, unification of excellent elastic recovery, comfort, multifunctionality and durability is achieved.

The invention belongs to the technical field of degradable and high-barrier modified plastics, and particularly relates to an environment-friendly, high-oxygen-barrier and water-resistant modified plastic, a plastic alloy and a functional product of the environment-friendly, high-oxygen-barrier and water-resistant modified plastic and the plastic alloy. According to the material, polyvinyl alcohol is used as a main component and is blended with auxiliaries such as a plasticizer and a cross-linking agent through a twin-screw melt extrusion technology, and modified plastic (HB-PVOH) with excellent barrier property, water resistance and mechanical property is formed. In order to further enhance the performance, the HB-PVOH can be co-extruded with polymers such as polyhydroxyalkanoate, polymethyl ethylene carbonate, polylactic acid, poly (butylene succinate) and the like to prepare binary or ternary plastic alloy. The material can be widely applied to the fields of high-end packaging, oxygen barrier coatings, environment-friendly packaging and the like, plastic or paper-plastic composite products are prepared through a multi-layer co-extrusion-film blowing, curtain coating or film spraying technology, the sustainable development trend of aluminum reduction, plastic reduction and fluorine reduction is met, and the material is a green packaging solution which is high in cost performance, environmentally friendly and practical.

The invention belongs to the technical field of preparation of molecular materials and adhesive tapes, and discloses a degradable mylar adhesive tape and a preparation method thereof, the degradable mylar adhesive tape comprises a degradable base material layer and a degradable adhesive layer; the degradable base material layer is prepared from the following raw materials in parts by mass: 25-35 parts of poly (butylene succinate) (PBS), 20-30 parts of polylactic acid (PLA), 10-15 parts of polycaprolactone (PCL), 8-12 parts of modified bamboo fiber powder, 3-5 parts of a compatibilizer and 0.5-1 part of an antioxidant; the degradable adhesive layer is prepared from the following raw materials in parts by mass: 40 to 50 parts of a modified starch-based adhesive, 15 to 25 parts of poly (butylene adipate-co-terephthalate) (PBAT), 10 to 15 parts of polyhydroxyalkanoate (PHA), 5 to 8 parts of sodium alginate-chitosan composite gel, 5 to 8 parts of an epoxypropane modifier, 1 to 2 parts of a cross-linking agent and 0.3 to 0.5 part of a de-foaming agent; by optimizing the raw material composition and the preparation process of the base material and the adhesive, the full-life-cycle degradability of the adhesive tape is realized, and meanwhile, excellent mechanical properties, insulativity and temperature resistance are ensured.

The invention belongs to the technical field of packaging materials, and particularly relates to a packaging material with antibacterial activity and a preparation method thereof. The packaging material with antibacterial activity is prepared from the following raw materials in parts by weight: 60 to 70 parts of polylactic acid, 10 to 20 parts of poly (butylene succinate), 3 to 5 parts of modified montmorillonite, 0.5 to 1 part of a bacteriostatic agent, 0.5 to 1 part of a lubricating agent, 1 to 3 parts of a compatilizer and 1 to 1.5 parts of functional filler. The packaging material provided by the invention has excellent barrier property, antibacterial property and mechanical property, stable fixation and synergistic interaction of functional components such as the modified montmorillonite and the functional filler are realized, and the packaging material has important significance in promoting technical progress of the packaging industry and meeting the requirements of the market on high-performance packaging materials.

The invention discloses bamboo fiber full-biodegradable tableware which is prepared from the following components in parts by weight: 40-50 parts of poly (butylene succinate), 15-20 parts of bamboo fiber, 12-16 parts of sweet potato starch, 8-12 parts of sodium alginate and the like, the bamboo fiber is pretreated by a sodium hydroxide solution, and montmorillonite is modified by a silane coupling agent KH-570. The preparation method comprises the steps of high-speed mixing, twin-screw extrusion granulation, injection molding, drying, ultraviolet sterilization and the like, five temperature zones are set for twin-screw extrusion, and the injection molding temperature is controlled to be 165-175 DEG C. The hydrophobicity is improved without depending on silicone oil and the like, and the synergism of mechanics and degradability is better; high-temperature heating is not needed, energy consumption is lower, and antibacterial and mildew-proof functions are added. The 60-day biodegradation rate of the tableware is larger than or equal to 95%, the tensile strength is larger than or equal to 26 MPa, and the tableware has excellent water resistance and oil resistance and meets the requirements for environmental protection and use.

The invention discloses a low-cost polyester degradable plastic garbage bag and an extrusion blow molding process thereof. The garbage bag is prepared from a composite material with a specific formula comprising poly (butylene succinate) (PBS), polylactic acid (PLA), surface-modified nano calcium carbonate, a degradation aid, a compatilizer and an anti-blocking agent. The key of the preparation process is as follows: deep drying pretreatment of raw materials; uniform dispersion and compatibility of all the components are realized through high-speed mixing and twin-screw melt blending granulation; a single-screw extrusion film blowing machine provided with an internal cooling (IBC) system is adopted, and stable forming of film bubbles and preparation of an ultrathin film are achieved under the condition that the temperature, the blow-up ratio and the traction speed are accurately controlled. Through collaborative innovation of a material formula and a process, the technical problems that an existing degradable garbage bag is high in cost, insufficient in mechanical property, poor in processing stability, uncontrollable in degradation behavior and the like are successfully solved.

The invention relates to the technical field of high polymer materials, in particular to a degradable PHA tableware material and a preparation method thereof. The degradable PHA tableware material overcomes the problem that the degradable PHA tableware material is poor in mechanical property and antibacterial property. The preparation method comprises the following steps: drying polyhydroxyalkanoate, poly (butylene succinate), acetylated lignin, nano-zinc oxide, chitosan oligosaccharide and hexagonal boron nitride, carrying out melt extrusion on the dried materials, maleic anhydride grafted PHA, acetyl tributyl citrate and cinnamyl aldehyde in a double-screw extruder, carrying out injection molding, and carrying out plasma treatment activation. Polyurethane antibacterial slurry containing silver-loaded zeolite is sprayed, the tableware material with the body-surface synergistic enhancement function is finally obtained, and the impact strength, rigidity and antibacterial rate of the material are improved.

The invention belongs to the technical field of plastic, and particularly relates to a preparation method of high-temperature-resistant degradable plastic and application of the high-temperature-resistant degradable plastic in food packaging. The preparation method of the high-temperature-resistant degradable plastic comprises the following steps: (1) weighing the following raw materials in parts by mass: 65-70 parts of polylactic acid, 15-20 parts of polyethylene glycol terephthalate, 10-14 parts of polyglycolic acid, 4-8 parts of poly (butylene succinate), 3-6 parts of filler, 2-5 parts of compatilizer and 1-2 parts of plasticizer; and (2) mixing the raw materials, putting the mixture into a double-screw extruder, and carrying out melt extrusion to obtain the high-temperature-resistant degradable plastic. The high-temperature-resistant degradable plastic prepared by the preparation method disclosed by the invention is excellent in high temperature resistance, tensile property and impact resistance. The plastic material disclosed by the invention can be safely used for manufacturing food packaging products, is particularly suitable for food packaging, transportation and storage scenes needing to tolerate a certain temperature, and is beneficial to promoting the deep application of degradable materials in the food industry.

The present application relates to the technical field of degradable packaging. Particularly disclosed are a degradable food container and a preparation method therefor. The degradable food container comprises a paper food container base body and a degradable coating applied on the paper food container base body, wherein the degradable coating is prepared from the following raw materials in parts by weight: 40-50 parts of polylactic acid; 10-15 parts of polybutylene succinate; 15-20 parts of polyglycolic acid; 10-20 parts of cassava starch; 5-8 parts of an external additive; 1.2-1.8 parts of montmorillonite; 0.2-0.8 parts of boron nitride nanotubes; and 1.5-2.5 parts of modified hemp fibers. The preparation method therefor comprises: heating polylactic acid, polybutylene succinate and polyglycolic acid to a molten state, then adding cassava starch and an external additive thereto, finally adding montmorillonite, boron nitride nanotubes and modified hemp fibers thereto, performing extrusion granulation, melting and then coating same on the surface of the paper food container base body, cooling same, and then cutting and forming same into a container to obtain the degradable food container. The degradable food container of the present application can exhibit excellent temperature change resistance when being subjected to temperature change caused by an external environment.

The invention discloses a marine land full-natural-domain biodegradable plastic and a method for preparing the biodegradable plastic, and relates to the technical field of biodegradable plastics. Polyhydroxyalkanoate, polylactic acid and poly (butylene succinate) are used as main matrixes of the material, modified alginate gel is innovatively introduced, and the biodegradable plastic is prepared. The gel has photo-thermal and ionic characteristics, and under the condition of land illumination, the photo-thermal effect of the quantum dots triggers the gel to shrink and release lipase to accelerate hydrolysis; in a marine environment, sodium ion replacement promotes gel to be disintegrated and continuously releases enzyme molecules, the gel, matrix resin, natural fibers and a plasticizer are subjected to twin-screw melt blending extrusion, and the biodegradable plastic is prepared. The technical problems of response lag, insufficient enzyme activity protection and low degradation efficiency of traditional biodegradable plastics in a complex natural environment are effectively solved, and self-adaptive efficient degradation in sea and land environments is realized.

The invention discloses a paper-plastic composite reactive polyurethane hot melt adhesive for low-temperature coating, and belongs to the technical field of polyurethane adhesives, the paper-plastic composite reactive polyurethane hot melt adhesive for low-temperature coating comprises the following components by weight: 50-70 parts of modified polyester polyol, 30-50 parts of modified polyether polyol, 15-24 parts of diisocyanate, and 5-30 parts of tackifying resin, 0.1-1 part of a catalyst, 5-35 parts of a filler, 0.05-2 parts of a polymerization inhibitor and 0.1-0.5 part of an antioxidant; the modified polyester polyol is modified poly (butylene succinate); the modified polyether polyol is modified polypropylene glycol; the polyurethane hot melt adhesive prepared by modifying 5-norbornene-2-methylamine with a strong polar bond-NH and 3, 7-dimethyl octyl-6-ene-1-alcohol containing an insect-proof and mildew-proof functional component with polyhydric alcohol has relatively low melting temperature and viscosity, has initial viscous force of more than 1N and final viscous force of more than 5N at the same time, and has the characteristics of high temperature resistance, high temperature resistance, high temperature resistance and the like. The method can be well applied to paper-plastic compounding for low-temperature coating.

The present application relates to degradable extrusion webs, composites and polymer blend compositions thereof, and uses thereof. A degradable extruded web includes a plurality of interconnected strands, at least a portion of the strands being made from a polymer blend comprising a polylactic acid polymer composition, a polybutylene succinate, and a degradation additive comprising a degradation agent in a carrier resin. The present disclosure also relates to turf and methods of making turf using such degradable extrusion webs.

The invention discloses a black mulching film for rice cultivation and a preparation method thereof, and relates to the technical field of agricultural high polymer materials. When the black mulching film for rice cultivation is prepared, 1, 4-butanediol, butanedioic anhydride and itaconic acid are subjected to vacuum polycondensation to prepare a poly (butylene succinate)-itaconic acid block copolymer; performing esterification reaction on starch and octenyl succinic anhydride to obtain modified starch; the preparation method comprises the following steps: pyrolyzing corn straws to prepare biological carbon black, carrying out acid pickling activation, loading abamectin, and carrying out surface modification by using 3-mercaptopropyltrimethoxysilane to prepare surface-modified drug-loaded biological-based carbon black powder; and mixing the poly (butylene succinate)-itaconic acid segmented copolymer, modified starch, the surface modified drug-loaded bio-based carbon black powder and glycerol according to a ratio, performing twin-screw extrusion, promoting a click chemical reaction between double bonds and sulfydryl, performing granulation, and performing blow molding to obtain the black mulching film for rice cultivation. The prepared black mulching film for rice cultivation has biodegradability, excellent mechanical properties and a slow-release insecticidal function.

The application discloses a kind of landscape flowerpot production polyester degradable plastics and preparation method thereof, belong to degradable plastics production technical field, first, landscape flowerpot production polyester degradable plastics includes following mass parts raw materials: polylactic acid 50~70 parts, polybutylene succinate 20~35 parts, modified polyhydroxy fatty acid ester 10~15 parts, rare earth strontium aluminate coated cerium oxide core-shell powder 0.8~1.2 parts, antioxidant 0.3~0.8 parts, lubricant 0.5~1.0 parts.The application is improved by modification PHA (promote interface compatibilization and low temperature toughness) and core-shell powder (enhance anti-ultraviolet and degradation control), combined with PLA / PBS basic system, comprehensively solve the core defects of landscape flowerpot material. Example data confirms that its low-temperature impact strength is increased by more than 50%, yellowing rate is reduced by more than 80%, rigidity remains stable, degradation rate is controllable, has outstanding environmental protection and market value.

The present invention relates to a wad (30) that is at least partially biodegradable for shot or bullet cartridges (10), made of a single piece of plastic. Said wad (30) comprises one or more polymers, including one or more polybutylene succinate polymers, and calcium carbonate. The mass fraction of said polymer(s) in said wad (30) is greater than or equal to 70%, the mass fraction of calcium carbonate in said wad (30) is greater than or equal to 6.5%, and the polybutylene succinate polymer(s) constitutes the majority by mass in said wad (30).

Provided are a resin composition having satisfactory impact resistance at low temperatures and having bleed resistance and biodegradability, a molded body, and a modifier for poly(butylene succinate)-based polymers. The resin composition comprises a polyester-based polymer (A) and a poly(butylene succinate)-based polymer (B), wherein the polyester-based polymer (A) comprises units of one or more polyhydric alcohols (a1) and units of one or more polycarboxylic acids (a2), the polyhydric alcohols (a1) including at least one diol selected from the group consisting of C3-C12 linear aliphatic diols and C3-C12 branched aliphatic diols and the polycarboxylic acids (a2) including a C4-C16 linear aliphatic dicarboxylic acid and a C4-C16 branched aliphatic dicarboxylic acid.

The present invention relates to novel carbodiimides, to a process for their production, and to the use of the novel carbodiimides in ester-based polyols, in polyethylene terephthalate (PET), in polybutylene terephthalate (PBT), in polytrimethylene terephthalate (PTT), in copolyesters, in thermoplastic polyester elastomers (TPE E), in ethylene vinyl acetate (EVA), in polylactic acid (PLA) and / or in PLA derivatives, in polybutylene adipate terephthalate (PBAT), in polybutylene succinate (PBS), in polyhydroxyalkanoates (PHA), in blends, in triglycerides, in thermoplastic polyurethanes, in polyurethane elastomers, in PU adhesives, in PU casting resins, for PU coatings or in PU foams as stabilizers.

The invention belongs to the technical field of high polymer materials, and particularly discloses a preparation method of a high-strength anti-aging plastic material. The method aims at solving the problems that a poly (butylene succinate) (PBS) material is poor in hydrolysis resistance, prone to ultraviolet aging and insufficient in thermal stability. The method comprises the following steps: premixing 60-80 parts by weight of PBS and 10-20 parts by weight of specifically compounded polylactic acid; then adding nano titanium dioxide, an antioxidant and a light stabilizer, and carrying out high-speed mixing; doping 1-3 parts by weight of a polycarbodiimide anti-hydrolysis agent and 2-5 parts by weight of a benzotriazole ultraviolet light absorber at a low temperature; carrying out melting reaction extrusion on the mixture and the epoxidized soybean oil through a double-screw extruder at the temperature gradient of 150-185 DEG C; and finally, carrying out underwater pelletizing, rapid cooling, vacuum deep drying and programmed heating annealing stabilization treatment to obtain a final product which has excellent mechanical strength, long-acting hydrolysis resistance, high ultraviolet aging resistance and thermal stability and is suitable for the high-performance fields of outdoor precise instruments, automobile exterior trimming parts and the like.

The invention provides a flame-retardant sound-insulation sponge and a preparation method thereof, and relates to the technical field of sponges. The flame-retardant sound-insulation sponge comprises the following components in parts by weight: 50-70 parts of a poly (butylene succinate) matrix; 15 to 25 parts of a dynamic cross-linking agent; 20 to 30 parts of an autocatalytic flame retardant; 10 to 20 parts of an acoustic topology enhancement body; 3-8 parts of a sound wave scatterer; and 1-5 parts of a nucleating agent. Smoke-free flame retardance is achieved through the autocatalytic flame retardant, and the mechanical strength can be enhanced; the embedded acoustic grid constructs a micro-crack-Helmholtz dual energy consumption mechanism, so that the material blocks high-frequency noise and absorbs low-frequency vibration at the same time; the dynamic cross-linked network endows the material with thermal repair capability, and the material still keeps high rebound rate after being compressed for multiple times; the gradient foaming process controls macropores to surround the acoustic grid and micropores to fill the matrix at the supramolecular scale, so that full-band noise treatment is realized; all innovative elements are deeply adaptive to industrial production, the industrialization problem of new materials is solved, and perfect unification of high performance and low-cost manufacturing is achieved.

Resorbable implants comprising poly(butylene succinate) and copolymers thereof have been developed. The implants implants are preferably sterilized, and contain less than 20 endotoxin units per device as determined by the limulus amebocyte lysate (LAL) assay, and are particularly suitable for use in procedures where prolonged strength retention is necessary, and can include one or more bioactive agents. The implants may be made from fibers and meshes of poly(butylene succinate) and copolymers thereof, or by 3d printing, and the fibers may be oriented. Coverings and receptacles made from forms of poly(butylene succinate) and copolymers thereof have also been developed for use with cardiac rhythm management devices and other implantable devices. These coverings and receptacles may be used to hold, or partially / fully cover, devices such as pacemakers and neurostimulators. The coverings and receptacles are made from meshes, webs, lattices, non-wovens, films, fibers, and foams, and contain antibiotics such as rifampin and minocycline.

The invention relates to the technical field of biodegradable materials, in particular to a high-transparency ultralow-haze PBAT-based flexible film and a preparation method and application thereof, and the high-transparency ultralow-haze PBAT-based flexible film is composed of poly (butylene adipate-co-butylene terephthalate), poly (butylene succinate-co-butylene terephthalate), an antioxidant, an anti-hydrolysis agent, an anti-blocking agent and a dispersing agent in parts by weight. The polyethylene terephthalate-butylene adipate is used as a main component, the polyethylene terephthalate-butylene adipate can be added as required, and a small amount of other assistants are added to guarantee the performance of the film. According to the invention, PBAT and PBST are blended to improve the optical performance of the film, casting cooling inhibits the formation of a large crystal region, and the transparency is synergistically increased; the problems of low transparency and high haze of the PBAT-based film are solved, the use requirement of the packaging field on the film material is met, and the application of the PBAT material is further widened.

The invention belongs to the field of food fresh-keeping packaging, and discloses a microporous litchi fresh-keeping film and a preparation method thereof, the microporous litchi fresh-keeping film is formed by compounding an inner layer, a middle layer and an outer layer; the inner layer is a blend of 60-70 parts of polylactic acid, 25-35 parts of chitosan and 3-5 parts of a rosemary extract, and the rosemary extract is powder obtained after ethanol reflux extraction and freeze drying; the middle layer is a blend of 4-6 parts of nano titanium dioxide, 2-4 parts of microencapsulated sodium bicarbonate, 5-8 parts of montmorillonite and 100 parts of poly (butylene succinate), the core material is sodium bicarbonate, and the mass ratio of the core material to the capsule material is 3: 1; the outer layer is a blend of 100 parts of polybutylene adipate-terephthalate and 5-8 parts of beewax, and the thickness ratio of the inner layer to the middle layer to the outer layer is 3: 2: 3; the invention aims to provide the microporous litchi preservative film and the preparation method thereof so as to solve the problems that the litchi preservative film in the prior art is poor in hydrophobicity, insufficient in gas regulation capability, incapable of effectively inhibiting peel discoloration and the like.

Compostable cold packs have a compostable film sealingly enclosing a fill material. The fill material includes a compostable or biodegradable sponge contributing 1% to 10% weight solids to the fill material, at least 90% by weight water, and a biocide, with the sponge in an expanded state as a result of absorption of the water and biocide. The compostable film comprises (1) a cellulose based film that includes a sealant film comprised of either a) polybutylene adipate terephthalate (PBAT), b) polybutylene succinate (PBS), c) un-oriented polylactic acid (PLA), d) biaxially oriented PLA (BOPLA), or (e) a cellulose wood pulp and starch blend; (2) a BOPLA based film that includes an inner sealant film comprised of either a) polybutylene adipate terephthalate (PBAT), b) polybutylene succinate (PBS), or c) un¬ oriented polylactic acid (PLA); or (3) a single film of heat sealable BOPLA. Methods of making the cold packs are also disclosed.

The present application belongs to the technical field of degradable polymer composite materials, and particularly relates to a heat-resistant degradable composite material and a preparation method thereof. In the method, epoxy silane grafted zirconium titanium phytate layered microsheets, lactic acid modified silicon boron calcium phosphate whiskers and light calcium carbonate are premixed with ethylene bis-stearamide and monoglyceride, and then mixed with polybutylene succinate, polylactic acid, polybutylene terephthalate adipate, an epoxy chain extender and an antioxidant, and then subjected to double-screw melt blending, cooling and granulation, drying, molding and heat treatment to obtain the heat-resistant degradable composite material. Through the synergistic effect of the epoxy silane grafted zirconium titanium phytate layered microsheets, the lactic acid modified silicon boron calcium phosphate whiskers and the degradable polyester matrix, the heat resistance, dimensional stability, mechanical strength and processing stability of the material are improved.

The application discloses a modified polylactic acid composite cable tie, which is made of a modified polylactic acid composite material, and raw materials of the modified polylactic acid composite material include, in percentage by weight, polylactic acid 15-50%, polybutylene succinate 15-50%, polybutylene adipate terephthalate 15-50%, and processing aids 5.1-15%. The processing aids include a release agent and a nucleating agent, the release agent includes pentaerythritol tristearate, and the nucleating agent is composed of an organic nucleating agent and an inorganic nucleating agent in a weight ratio of 2:1-10:1. The modified polylactic acid composite material can be used to prepare the cable tie by means of injection molding.

The application provides a preparation method of a biodegradable polybutylene succinate and polybutylene adipate block copolymer, in which succinic acid and adipic acid are respectively esterified and pre-polycondensed to prepare a prepolymer, the prepolymer is respectively polycondensed under high vacuum conditions, and then co-polycondensation is carried out. The method solves the problems of random distribution of polymer structure, many by-products, poor thermal performance, low molecular weight and the like in the prior art, the preparation method can make the polymer have a block structure, significantly reduce the generation of side reactions and the yield of by-products, improve the thermal performance and mechanical performance of the polymer, and a block polymer with excellent performance and high molecular weight is obtained.

The invention belongs to the field of bio-based adhesives, and discloses a bio-based pressure-sensitive adhesive and a preparation method thereof. The composite material is prepared from the following raw materials in parts by weight: 20 to 40 parts of shellac resin, 40 to 60 parts of a polyhydroxyalkanoate (PHA)-poly (butylene succinate) (PBS) block copolymer, 5 to 10 parts of chitosan, 2 to 6 parts of nano cellulose, 2 to 5 parts of glycidyl gallate, 4 to 9 parts of acetylated butyl ricinoleate, 3 to 7 parts of bentonite and 2 to 5 parts of a trehalose-polyglycerol composite compatilizer. The bio-based pressure-sensitive adhesive and the preparation method thereof aim at solving the problems that an existing bio-based pressure-sensitive adhesive has the single base material performance defect, the compatibility of multiple components is poor, and the mechanical property and the degradability are difficult to consider at the same time, and comprehensive improvement of the environmental protection property, the adhesive property and the mechanical stability of the pressure-sensitive adhesive is achieved.