399 results about "Polybutylene" patented technology

A biodegradable polymer composite, a method of making the same and use for same are provided. The biodegradable polymer composite has about 30 to 99.5% by weight of a polymer selected from a group consisting of polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), polyhydroxyalkanoates (PHA), and polycaprolactone (PCL) grafted with a compatibilizer selected from a group consisting of maleic anhydride, glycidyl methacrylate, pyromellitic anhydride, acrylic acid, polyacrylic acid, methylene diphenyl diisocyanate, poly(glycidyl methacrylate, copolymer(s) of glycidyl methacrylate; and about 0.5 to 50 % by weight a nano-filler or a micro-filler. The biodegradable polymer composite does not contain polylactic acid. Surfaces of the nano-filler or the micro-filler may be modified using a grafting agent so that the biodegradable polymer composite has enhanced mechanical properties, increased heat resistance, compostablity and / or improved processability. The biodegradable polymer composite may be used to make flexible articles, such as a freezer wrap and a farming sheet.

Disclosed in the present invention are a high-strength polylactic acid material, a preparation method therefor, and use thereof, belonging to the technical field of macromolecular materials. The high-strength polylactic acid material comprises the following components in parts by weight: 80-90 parts of polylactic acid, 10-20 parts of polybutylene adipate terephthalate, 1-5 parts of a nucleating agent, and 2-5 parts of a compatibilizing agent. The mesh number of the nucleating agent is 1500-2500 mesh; the compatibilizing agent is polycaprolactone, and the intrinsic viscosity thereof is 1.0-3.0 dL / g. The present invention lowers the melting temperature and shortens the melting time of PLA and PBAT, reduces the negative impact of polymer degradation and aging on mechanical properties, produces a heterogeneous nucleation effect, and performs the function of a crystallization nucleus in the cooling crystallization stage, improving crystallization speed and crystallinity, while causing the crystalline phase structure to tend toward a spherulitic state, improving the tensile strength of the polylactic acid material.

The invention belongs to the technical field of packaging adhesive films for photovoltaic modules, and particularly relates to a water-blocking and oxygen-blocking adhesive film for photovoltaic module packaging and a preparation method of the water-blocking and oxygen-blocking adhesive film for photovoltaic module packaging, and the water-blocking and oxygen-blocking adhesive film comprises a water-blocking layer and an oxygen-blocking layer which are adjacent to each other through co-extrusion; wherein the waterproof layer is prepared from the following materials in parts by mass: 100 parts of grafted polyolefin resin, 0.05 to 0.5 part of alkaline nano oxide and 0.1 to 1 part of antioxidant; the oxygen barrier layer is prepared from the following materials in parts by mass: 100 parts of oxygen barrier resin, 0.1-1 part of an oxygen absorbent, 0.1-1 part of a silane coupling agent and 0.05-0.5 part of a light conversion agent; the oxygen-resistant resin comprises any one or a combination of more of PS (polystyrene), PE (polyethylene), PET (polyethylene terephthalate), PB (polybutylene), PP (polypropylene), PVC (polyvinyl chloride), PVDC (polyvinyl dichloride), PA6 (polyamide 6) and EVOH (ethylene-vinyl alcohol).

The invention discloses a power-on viscosity-reducing adhesive composition, a viscosity-reducing adhesive tape and a preparation method of the viscosity-reducing adhesive tape, and relates to the technical field of adhesive materials. The preparation method comprises the following steps: adding polyurethane acrylate and polybutylene adipate into a planetary stirring kettle, stirring, sequentially adding a PEDOT / PSS solution, a nano core-shell material, a dynamic cross-linking agent, hydrogenated rosin tackifying resin, TPU particles and butylated hydroxytoluene, stirring to obtain mixed glue, and carrying out vacuum defoaming to obtain the electrified viscosity-reducing glue composition. Coating a release film with the electrified viscosity-reducing adhesive composition, carrying out UV curing, and attaching the release film on the other side to obtain the electrified viscosity-reducing adhesive tape. The prepared electrified viscosity-reducing adhesive composition and viscosity-reducing adhesive tape have the advantages of being excellent in mechanical property, sensitive in response, remarkable in stripping force difference before and after electrification, stable at high temperature, stable in circulation, resistant to pollution and the like, nondestructive disassembly and reutilization of devices are achieved by regulating and controlling the adhesive force through an electric field, and the electrified viscosity-reducing adhesive composition and viscosity-reducing adhesive tape can be applied to an electric response assembly scene.

The present application relates to the technical field of bio-based polymer material, and more particularly to a full bio-based PBAT-PLA copolymer, a preparation method and an application thereof, which is prepared by melt mixing bio-based polybutylene adipate terephthalate, bio-based polylactic acid and bio-based multi-epoxy chain extender through a twin-screw extruder, so that the tensile strength of the full bio-based PBAT-PLA copolymer is 31.5-44.3 MPa, and the elongation at break is 85-498%. The bio-based multi-epoxy chain extender prepared by specific selection can simultaneously improve the tensile strength and elongation at break of the full bio-based PBAT-PLA copolymer, and solve the technical problems of poor compatibility of traditional bio-based polylactic acid and non-bio-based polybutylene adipate terephthalate, and the technical problem that the addition of existing chain extenders cannot simultaneously improve the tensile strength and elongation at break of the copolymer.

The invention relates to a thermoplastic composition comprising A) polybutylene adipate terephthalate (PBAT), B) CaCO3 powder, C) one or more citric acid triesters, and optionally D) optional auxiliary components, wherein the components A) to D) add up to 100 weight-%. The invention further relates to article comprising such compositions, a stone paper comprising a sheet structure consisting of the thermoplastic composition, and a method for the manufacture of such stone paper.

The invention discloses a degradable express bag material and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a degradable express bag material. The composite material is prepared from the following raw materials in parts by weight: 40 to 50 parts of poly (butylene adipate-co-terephthalate), 20 to 30 parts of polycaprolactone, 5 to 8 parts of modified bamboo fiber, 2 to 4 parts of modified nano montmorillonite, 3 to 6 parts of tributyl citrate, 0.1 to 0.3 part of antioxidant 1076, 1 to 2 parts of iron dithiocarbamate master batch, 2 to 3 parts of maleic anhydride grafted poly (butylene adipate-co-terephthalate) and 0.3 to 0.6 part of zinc stearate. 0.1 to 0.3 part of baicalein; and 1 to 3 parts of chitosan-sorbitol composite coating liquid. According to the degradable express bag material, poly (butylene adipate-co-terephthalate) and polycaprolactone are used as main degradable raw materials, modified bamboo fibers and modified nano-montmorillonite are matched to enhance the mechanical property, an antioxidant 1076, baicalein and the like are added to guarantee the stability and functionality, temperature is accurately controlled in the preparation process, multi-step modification is adopted for optimizing component combination, and the degradable express bag material is prepared. The performance is improved through the composite coating, degradability is achieved, and good usability is achieved.

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.

Provided are linear low density polyethylene (LLDPE) compositions including a LLDPE polymer and from 100 ppm to 10,000 ppm of a polymer processing aid (PPA) that is substantially free of fluorine-containing compounds. The non-fluorine-containing inventive PPAs may be a polyphosphite, a polysiloxane, a polyethylene glycol, a high MFR polypropylene, a high MFR polybutene-1, a metal salt of a fatty acid, a polyamide, or a boron nitride. Also provided are polyolefin masterbatches including from 1 wt. % to 50 wt. % of such inventive PPAs and methods of decreasing melt fracture % in linear low density polyethylene films by blending such inventive PPAs and polyolefin masterbatches into cast films and blown films during extrusion processing.

The invention discloses a flame-retardant polyurethane hot melt adhesive and a preparation method thereof, and belongs to the technical field of hot melt adhesives. Comprising the following raw materials in parts by weight: 30-50 parts of polybutylene adipate glycol, 35-55 parts of polypropylene oxide glycol, 25-50 parts of MDI, 6-18 parts of modified dihydric alcohol, 0.1-0.3 part of a catalyst, 3-5 parts of a lubricant and 3-7 parts of an antioxidant. The polyurethane hot melt adhesive is prepared by a two-step method, no solvent is added, and the method is environment-friendly; mDI is selected as isocyanate, so that the hot melt adhesive is endowed with excellent stability and mechanical properties; wherein various groups in modified dihydric alcohol molecules can achieve a synergistic effect, so that the flame retardance, the heat resistance and a certain degree of mechanical properties of the hot melt adhesive are remarkably enhanced, and the hot melt adhesive is stable in performance and not easy to fall off; therefore, the prepared hot melt adhesive is excellent in mechanical property, has stable and efficient flame retardance and heat resistance, is environmentally friendly, and has important application value in the technical field of hot melt adhesives.

The invention relates to the technical field of anti-yellowing, in particular to anti-yellowing lining cloth with a hot melt coating and a preparation method of the anti-yellowing lining cloth. Composite carbon dots, an anti-yellowing agent and a composite chitosan solution are adopted to prepare finishing liquid for finishing the lining cloth; the preparation method comprises the following steps: selecting furfural and urea as a carbon source and a nitrogen source, performing one-step hydrothermal synthesis to obtain a nitrogen-doped furfural-based carbon dot, and grafting an amino-terminated polyimidazolium salt antibacterial compound to obtain a composite carbon dot; wherein the amino-terminated polyimidazolium salt antibacterial compound is an amino-terminated halogen-free polyimidazolium salt antibacterial compound which is prepared by taking ethylenediamine, butyric acid, glyoxal and formaldehyde as raw materials based on amine-aldehyde polycondensation and has good biocompatibility; the preparation method comprises the following steps: by taking polybutylene adipate, toluene diisocynate and isophorone diisocyanate as main monomers, polypropylene oxide triol as a crosslinking monomer, 2, 2-dimethylolpropionic acid and 4, 4 '-diaminodiphenyl disulfide as chain extenders and composite carbon dots as an end-capping reagent, adding water and emulsifying to obtain the waterborne polyurethane hot melt adhesive.

The invention discloses a silane-crosslinked low-smoke halogen-free flame-retardant oil-resistant polyolefin cable material and a preparation method thereof. The method comprises the following steps: preparing a bio-based polyesteramide toughening phase which is pre-polymerized by castor oil-based polyamide and poly (butylene adipate-co-terephthalate) and is terminated by itaconic anhydride; the preparation method comprises the following steps: self-assembling phytic acid and melamine to wrap ammonium polyphosphate, so as to prepare supramolecular flame-retardant gel powder; the method comprises the following steps: grafting aramid pulp fibers by using a phosphorus-containing silane coupling agent to prepare a reactive liquid crystal reinforced phase; the preparation method comprises the following steps: blending and banburying the components with a hydrogenated styrene-isoprene-styrene block copolymer, an antioxidant and a peroxide cross-linking agent, carrying out dynamic vulcanization and interface bonding, and carrying out extrusion and electron beam irradiation to finally crosslink. An interpenetrating-topology network structure is formed in the prepared cable material, the crosslinking degree is larger than or equal to 82%, and the cable material is rapid in crosslinking, excellent in oil resistance, low in smoke and free of toxicity and is particularly suitable for super high-rise building hanging cables, deep sea exploration cables and new energy automobile liquid cooling cables.

The invention provides a food packaging bag and a preparation method thereof. The food packaging bag comprises the following raw materials in parts by mass: 50 parts of polylactic acid, 50-100 parts of poly (butylene adipate-co-terephthalate), 5-10 parts of a plasticizer and 5-10 parts of a modified filler, wherein the modified filler comprises a multi-arm grafted filler, the end group of each arm is an acyl chloride group, and each arm comprises a polyethylene glycol chain segment. According to the food packaging bag, polylactic acid and poly (butylene adipate-co-terephthalate) are used as main materials, meanwhile, the brittleness of the food packaging bag is further reduced and the flexibility of the food packaging bag is improved by using a plasticizer, and in addition, by adding a modified filler comprising a multi-arm grafted filler, the food packaging bag is more environment-friendly. The multi-arm grafted filler can improve the barrier property of the food packaging bag on the premise of not deteriorating the flexibility of the food packaging bag, so that the obtained food packaging bag has good flexibility and barrier property.

The invention discloses an antibacterial sanitary towel packaging bag and a preparation method thereof. The antibacterial sanitary towel packaging bag comprises a base material layer, an antibacterial layer and a leakage-proof layer. The base material layer is prepared by blending modified polylactic acid, polybutylene adipate and the like and contains a degradation accelerant; the antibacterial layer contains antibacterial peptide-loaded nano montmorillonite, chitosan and the like, and loofah sponge fiber enhances slow release; and the leakage-proof layer is an ethylene-vinyl acetate copolymer and modified silicon dioxide blended film and is provided with breathable micropores. The preparation method comprises the steps of forming the base material layer, coating the antibacterial layer and the like, and process parameters of each layer are accurately controlled. According to the packaging bag, through cooperation of three layers, the bacteriostasis rate of the packaging bag on escherichia coli and staphylococcus aureus in 24 hours is higher than 99%, the degradation rate of the packaging bag in 83 days is higher than 88%, the oxygen permeability is 4.5-5.2 cm < 3 > / (m224h 0.1 MPa), and the packaging bag has the advantages of long-acting antibiosis, air permeability, leakage prevention, environmental protection, degradation and good mechanical properties, and meets the storage and use requirements of sanitary napkins.

The invention relates to the technical field of composite film preparation, in particular to a multi-additive synergistic enhanced degradable packaging composite film and a preparation method thereof, and the multi-additive synergistic enhanced degradable packaging composite film comprises a matrix material group, a barrier system, an anti-hydrolysis system and a stable system; the base material comprises the following components in parts by mass: 25-35 parts of polylactic acid; 15 to 25 parts of poly (butylene adipate / terephthalate); and 8-15 parts of thermoplastic starch. Through multi-dimensional collaborative design of the matrix material, the barrier system, the hydrolysis-resistant system and the stable system, the performance bottleneck of a traditional material is broken through, and the contradiction between brittleness and flexibility is solved through rigid-flexible blending of matrix components; according to the present invention, the uniform dispersion and the interface strengthening of the nano-filler are ensured by using the melt co-extrusion and the directional arrangement technology, and the composite film prepared by using the process has characteristics of excellent degradation rate, high strength, high barrier property and environmental adaptability, can be widely used in the high-end fields of cold chain food and medicine packaging, and solves the problems existing in the traditional technology.

The application belongs to the technical field of plastics, and particularly relates to a degradable antibacterial plastic packaging bag and a preparation method thereof. The degradable antibacterial plastic packaging bag comprises the following raw materials in parts by weight: polycaprolactone 70-90 parts; polybutylene adipate terephthalate 20-40 parts; Cr and Cu co-modified ZIF-8 5-20 parts; and cerium oxide tannic acid material 2-6 parts. The Cr and Cu co-modified ZIF-8 synergistically improves the antibacterial performance of the packaging bag, and the addition of the cerium oxide tannic acid material further improves the antibacterial performance of the packaging bag. Moreover, the degradable antibacterial plastic packaging bag prepared by the application has excellent mechanical properties.

The invention relates to the field of processing of full-biodegradable high polymer materials, in particular to a weather-resistant master batch and a preparation method and application thereof, and the weather-resistant master batch comprises the following components: 40-70 parts by weight of poly (butylene adipate-co-terephthalate); 10 to 20 parts of polylactic acid; 20-40 parts by weight of a supported ultraviolet absorbent; 15-25 parts by weight of modified talcum powder; 1-3 parts by weight of a light stabilizer; 1-3 parts by weight of a lubricant; 1-3 parts by weight of an antioxidant; the invention discloses a degradable mulching film and a preparation method thereof.The degradable mulching film is prepared from, by weight, 1-3 parts of a supported ultraviolet absorbent, 1-3 parts of modified talcum powder and 1-3 parts of a chain extender, the degradable mulching film comprises weather-proof master batches and poly (adipic acid) / butylene terephthalate, and the mass ratio of the weather-proof master batches to the poly (adipic acid) / butylene terephthalate is (5-15): (85-95). The ultraviolet aging resistance of the degradable mulching film is further improved.

The invention discloses a high-elastic material for an anti-slip sole and a preparation method of the high-elastic material in the field of high polymer materials. The high-elastic material is prepared from the following raw materials: modified polyurethane, modified silicone rubber, calcium carbonate, dicumyl peroxide, 2-mercaptobenzothiazole, N-isopropyl-N '-phenyl p-phenylenediamine and naphthenic oil. Wherein the modified polyurethane is prepared by the following steps: carrying out vacuum dehydration on polybutylene adipate, reacting with toluene diisocynate to prepare an isocyanate-terminated prepolymer, adding dimethylolpropionic acid, triethylamine and deionized water to obtain a water-based dispersion, and carrying out graft copolymerization on the water-based dispersion, methyl methacrylate and the like; the preparation method comprises the following steps: preheating modified polyurethane, mixing with modified silicone rubber at a high speed, adding calcium carbonate and naphthenic oil, carrying out double-roller open milling and thin-passing, adding a vulcanizing agent and the like, carrying out overturning milling, and carrying out flat plate vulcanization molding. The material is used for anti-skid soles, and has the advantages of high elasticity, lasting skid resistance and excellent weather resistance.

The invention provides a hyaluronic acid liposome with double anti-wrinkle and skin feeling improving functions, a preparation method thereof, essence, a mask, a toning lotion and application, and relates to the field of cosmetics. The hyaluronic acid liposome with the dual anti-wrinkle and skin feeling improving functions is prepared from the following raw materials in percentage by mass: 1 percent to 5 percent of hydrogenated lecithin, 0.5 percent to 1.5 percent of PEG-60 hydrogenated castor oil, 0.5 percent to 2 percent of Pellicer L-30, 2 percent to 10 percent of PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerol, 2 percent to 50 percent of glycerol, 1 percent to 2 percent of hexanediol, 5 percent to 15 percent of polydimethylsiloxane, 0.05 percent to 0.5 percent of micromolecular hydrolyzed sodium hyaluronate, 0.05 percent to 0.1 percent of macromolecular sodium hyaluronate and the balance of water, wherein the total mass of the raw materials is 100 percent. Meanwhile, micromolecular hyaluronic acid and macromolecular hyaluronic acid are wrapped, so that the synergistic effect of the large and small molecular hyaluronic acid is realized.

The invention discloses a jacquard vamp material based on bio-based degradable polylactic acid (PLA) and a preparation method thereof, and relates to the technical field of shoe materials. The jacquard vamp material is of a three-layer jacquard structure formed by integrally weaving PLA composite filaments through a jacquard warp knitting machine. The PLA composite filament is prepared from the following raw materials in parts by weight: 80-95 parts of polylactic acid (PLA) slices, 5-15 parts of poly (butylene adipate / terephthalate) (PBAT), 3-8 parts of a flexibilizer, 1-3 parts of a compatilizer, 0.5-2 parts of an anti-hydrolysis agent and 0.5-1.5 parts of a lubricant. According to the invention, the bio-based PLA is used as a main raw material and is matched with degradable auxiliaries such as PBAT, so that the whole vamp material can be completely biodegraded under a composting condition, the problem of environmental pollution of a traditional vamp is fundamentally solved, and meanwhile, through blending modification of PBAT and the flexibilizer, the flexibility and impact resistance of the PLA material are remarkably improved, and the vamp material has good application prospects. The requirements of the vamp material on softness, wear resistance and durability can be met.

The invention discloses a water-based adhesive and a preparation method thereof, and relates to the technical field of chemical engineering. The preparation method comprises the following steps: putting polybutylene adipate polyester polyol and homemade polyol into a reaction kettle 1, vacuumizing, cooling, adding a catalyst, adding isophorone diisocyanate, heating, carrying out heat preservation treatment, adding a modifier and a hydrophilic chain extender, carrying out a stirring reaction, adding 1, 4-butanediol, continuously carrying out a reaction while adding acetone to reduce viscosity, and cooling to obtain a polyurethane prepolymer; adding triethylamine into the prepolymer for salinization, dispersing deionized water into the prepolymer under high-speed stirring, stirring to obtain an acetone-containing water-based emulsion, continuously dropwise adding ethanediamine for chain extension reaction, and finally performing reduced-pressure extraction to remove acetone to obtain the water-based polyurethane adhesive. The polyurethane adhesive prepared by the preparation method disclosed by the invention has excellent mechanical property and flame retardant property.

The invention relates to the technical field of biodegradable high polymer materials, in particular to a tear-resistant high-barrier biodegradable mulching film and a preparation method thereof, and the tear-resistant high-barrier biodegradable mulching film is prepared from the following raw materials in parts by weight: 60-90 parts of poly (butylene adipate-co-terephthalate); 10 to 40 parts of poly (propylene carbonate); 0.5-5 parts of a plasticizer; 0.05 to 0.3 part of a cross-linking agent; 0.1 to 10 parts of talcum powder; 0.1 to 2 parts of a lubricant; 0.1-1 part of an anti-blocking agent; 0.1 to 1 part of an antioxidant; 0.1 to 1 part of an anti-ultraviolet agent; 0.1-1 part of a light stabilizer; 0.1 to 1 part of an anti-hydrolysis agent; 0.1-1 part of a nucleating agent; the plasticizer is poly (1, 2-propylene glycol adipate); and the cross-linking agent is 1, 4-bis (tert-butylperoxy) diisopropyl benzene. The film has good mechanical properties and water vapor transmission amount, can be completely biodegraded, and has good aging resistance.

The invention relates to a fully-degradable PLA composite material with ceramic characteristics and a preparation method thereof. The fully-degradable PLA composite material is prepared from the following raw materials in percentage by weight: 25-45% of PLA, 5-13% of PBS, 48-60% of a filling agent and the balance of a processing aid, the filler is obtained by modifying an inorganic filler through a modifier; the modifier is prepared from methyl hydrogen-containing polysilazane and a bio-based maleic anhydride graft; the bio-based maleic anhydride graft is a composition of one or more of maleic anhydride grafted poly (butylene adipate-co-terephthalate), maleic anhydride grafted polyvinyl alcohol and octenyl succinic anhydride modified starch. Through the synergistic effect of the inorganic components of the filling agent, the proportion of PLA / PBS and the modifier, the filling agent has the advantages that the filling effect is good; the material is matched with the use requirement of the ceramic flying saucer on key indexes, and all components have bio-based or degradable characteristics, so that the dual targets of'ceramic performance bionics' and'environment-friendly controllable degradation 'are achieved.

To provide a new microorganism capable of decomposing biodegradable plastic, especially polylactic acid (PLA) or polybutylene adipate terephthalate (PBAT).　The microorganism according to the present disclosure belongs to the family Bacillaceae, and has been deposited under Accession No. NITE BP-04083.

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.

A foam precursor, a foam, and methods for making the foam precursor and the foam is described. The foam precursor includes unmodified starch, polybutylene adipate-co-therephthalate (PBAT), and water. A PBAT weight percent representative of the PBAT included in the foam precursor is from 10% to 40%. A starch weight percent representative of the unmodified starch included in the foam precursor is greater than the PBAT weight percent. A water weight percent representative of the water included in the foam precursor is 20% or less. The PBAT weight percent is greater than the water weight percent. A density of the foam precursor is from 400 kg / m3 to 1500 kg / m3.

To provide a new microorganism capable of decomposing biodegradable plastic, especially polylactic acid (PLA) or polybutylene adipate terephthalate (PBAT).SOLUTION: The microorganism according to the present disclosure belongs to the family Bacillaceae, and has been deposited under Accession No. NITE BP-04083.SELECTED DRAWING: Figure 3

The preparation method comprises the following steps: S1, in an inert atmosphere, adding hydroxyl-terminated polybutylene and toluene diisocynate into a reaction kettle, and generating a polyurethane prepolymer under the catalysis of dibutyltin dilaurate; s2, adding a chain extender into the polyurethane prepolymer to carry out chain extension reaction; s3, adding a waterproof functional body, methacryloyloxypropyl polyhedral oligomeric silsesquioxane and a silane coupling agent K560 into the polyurethane subjected to the chain extension reaction, uniformly mixing, and then forming a film, so as to obtain the high-waterproofness waterproof film. The waterproof film of the present invention has excellent acoustic sensitivity and waterproof performance.

The invention discloses a method for enhancing the biological nitrogen fixation capacity of soil based on micro-plastics, which comprises the following steps: adding poly (adipic acid-butylene terephthalate) micro-plastics into target soil, and the addition amount is 0.2-2% of the mass of the soil. The activity of dehydrogenase and urease of rhizosphere microorganisms is activated through the degradation process of the poly (butylene adipate-co-terephthalate) micro-plastic in soil, and microorganism groups with a nitrogen fixation function are specifically enriched, so that the expression of nitrogen fixation genes is up-regulated, the biological nitrogen fixation capacity of the soil is enhanced, and the nitrogen condition of the soil is improved.

The invention discloses a preparation method of a high-resilience foaming material, which comprises the following steps: S10, by taking modified thermoplastic polyurethane as a base material, carrying out permeation saturation on the base material by adopting supercritical fluid to obtain a saturated material; the soft segment of the base material is formed by copolymerizing polybutylene adipate and polycaprolactone, and the mass ratio of the polybutylene adipate to the polycaprolactone is (8: 1)-(9: 1); s20, the saturated material is subjected to injection molding to form a small blank; wherein during injection molding, the melt temperature ranges from 200 DEG C to 230 DEG C, the melt pressure ranges from 15 MPa to 25 MPa, and the mold temperature ranges from 20 DEG C to 40 DEG C; and S30, heating and foaming the small blank to obtain the high-resilience foaming material. Wherein the heating temperature of the foaming mold is that the upper mold is 185 DEG C + / -2 DEG C, the lower mold is 190 DEG C + / -2 DEG C, and the holding pressure is 7-9 MPa. The foaming material prepared by the preparation method has a rebound rate which is greater than 80%.