105 results about "Polyfuran" patented technology

The invention discloses a bio-based PEF fiber with a cool feeling and a quick-drying function as well as a preparation method and application thereof, and belongs to the field of textile functional materials. The bio-based PEF fiber with the cool feeling and the quick-drying function is prepared by spinning bio-based poly (ethylene 2, 5-furandicarboxylate) with an epoxy group and a sulfonic acid group; the bio-based PEF fiber has a profiled fiber cross section and / or a hollow structure. The bio-based poly (ethylene 2, 5-furandicarboxylate) with an epoxy group and a sulfonic acid group is adopted, the hydrophilicity is improved, and the PEF fiber with the special-shaped section and / or the hollow structure is constructed to achieve the cool feeling, so that the moisture absorption and quick drying effects of the fiber are improved. The heat dissipation effect of the fiber can be improved, the moisture absorption and quick-drying effect of the fiber can be improved, and therefore dual improvement of the cool feeling and the quick-drying function is achieved. When the PEF fiber with the cool feeling and the quick-drying function is prepared, the mechanical property, the biodegradability and the like can be considered.

The invention belongs to the technical field of preparation of bio-based functional fibers, and relates to a preparation method of high-shrinkage polyethylene furandicarboxylate fibers. The preparation method comprises the following steps: drying the polyethylene furandicarboxylate slices, and carrying out melt blending spinning to obtain the high-shrinkage polyethylene furandicarboxylate fiber. The linear density of the fiber is 2.22-4.44 dtex, and the linear density deviation ratio is-5%-5%. The breaking strength of the fiber is 3.5-4.5 cN / dtex, the elongation at break is 53.5-68.5%, the content of super-long fibers is 0-3 mg / 100 g, the defect content is 3-20 mg / 100 g, the crimp number is 12-15 / 25 mm, the crimp rate is 14-18%, and the boiling water shrinkage rate is 60-80%. The prepared high-shrinkage polyethylene furandicarboxylate fiber is a 100% high-shrinkage polyester fiber, the performance of the fiber is far superior to that of a conventional high-shrinkage fiber, and the high-shrinkage polyethylene furandicarboxylate fiber can become a substitute product of PET.

The invention provides a synthesis method of bio-based poly (ethylene 2, 5-furandicarboxylate) (poly (ethylene 2, 5-furandicarboxylate) for short) and performance application of the bio-based poly (ethylene 2, 5-furandicarboxylate). According to the method, 2, 5-furandicarboxylic acid (FDCA) derived from renewable resources and ethylene glycol (EG) are used as main raw materials, and the high-molecular-weight PEF is prepared through microwave-assisted esterification-polycondensation reaction under the action of a metal catalyst. The prepared PEF has excellent thermal mechanical property and gas barrier property, the glass transition temperature is about 58.6 DEG C, the melting temperature is about 187.4 DEG C, and the thermal decomposition 18% weight loss temperature exceeds 400 DEG C. The PEF material can be biologically degraded under the industrial composting condition, and the degradation speed is higher compared with that of traditional petroleum-based PET polyester. The PEF provided by the invention is suitable for the fields of food packaging films, beverage bottles and fiber materials, has the advantages of biodegradability, heat resistance stability and high barrier property, can partially replace polyethylene glycol terephthalate (PET) and other petrochemical plastics, and meets the requirements of sustainable development.

The present invention discloses a method for upgrading polyester materials to dicarboxylic acid esters and ethylene carbonate, and relates to the comprehensive utilization of waste resources and the cascade utilization of raw materials. The method uses multiple types of green ionic liquid catalysts to catalyze the methanolysis reaction of PET, and then dimethyl carbonate captures the generated ethylene glycol in situ, forms a five-membered cyclic ethylene carbonate through nucleophilic cyclization, pulls the reaction equilibrium to move forward, and completely depolymerizes PET waste. The products of the method of the present invention are dimethyl terephthalate and five-membered cyclic ethylene carbonate. The present invention can be used for the depolymerization and upgrading of waste PET materials, and can also be used for other similar polyesters, such as polyethylene succinate, polyethylene adipate and polyethylene 2,5-furan dicarboxylate, which are also suitable for the recovery strategy of the present invention, and the products are the corresponding dimethyl succinate, dimethyl adipate and 2,5-furan dicarboxylate.

The invention provides nickel-carbon conductive shielding foam. The nickel-carbon conductive shielding foam sequentially comprises a conductive layer, foam, a bonding layer and an isolating layer from top to bottom, the foam comprises 25 to 40 parts of nickel-carbon nanotube-cerium oxide composite powder, 1 to 5 parts of an ionic liquid dispersant, 10 to 25 parts of organic silicone oil, 20 to 40 parts of silicone rubber, 5 to 10 parts of polyfuran, 5 to 10 parts of maleimide, 0.5 to 3 parts of a silane coupling agent, 0.01 to 0.1 part of a platinum catalyst and 0.2 to 1.5 parts of a cross-linking agent. The conductive foam can effectively restrain high-frequency electromagnetic interference generated in modern electronic equipment and ensure normal work of the equipment. A self-repairing system is constructed by adding polyfuran and maleimide. When the foam generates cracks under the action of mechanical stress or thermal cycle in the using process, the self-repairing material can automatically repair a conductive network through a reverse Diels-Alder reaction, and the shielding performance and the conductivity of the material are recovered.

The invention provides a preparation method of nickel-carbon conductive shielding foam, which comprises the following steps: S1, mixing carbon nanotubes and cerium oxide in proportion, and adding nano nickel powder to form a suspension; adding a reducing agent to carry out reduction reaction so as to deposit nickel ions on the surfaces of the carbon nanotubes and the cerium oxide particles; s2, mixing the nickel-carbon nanotube-cerium oxide composite powder with an ionic liquid dispersant, mixing organic silicone oil and silicone rubber to serve as a matrix, then adding polyfuran and maleimide, and adding a silane coupling agent to be fully combined; adding the dispersed composite powder into an organic silicon matrix, continuously stirring until the materials are uniformly mixed, then adding a platinum catalyst and a cross-linking agent, pouring the mixture into a mold, and curing to form foam; s3, pasting a conductive layer; S4, setting a bonding layer; and S5, setting an isolation layer. By adopting the nickel-carbon nanotube-cerium oxide composite material, the electromagnetic shielding performance of the foam is greatly improved. The ultra-thin self-repairing function is also realized.

The present invention belongs to the technical field of the preparation of bio-based functional fibers, and relates to a preparation method of highly shrinkable polyethylene furandicarboxylate fibers. Preparation method: The polyethylene furandicarboxylate chips are dried and then melt-blended and spun to obtain highly shrinkable polyethylene furandicarboxylate fibers. The linear density of the fibers is 2.22 - 4.44 dtex, and the linear density deviation rate is -5% - 5%. The breaking strength of the fibers is 3.5 - 4.5 cN / dtex, the breaking elongation rate is 53.5 - 68.5%, the content of ultra-long fibers is 0 - 3 mg / 100 g, the content of defects is 3 - 20 mg / 100 g, the number of crimps is 12 - 15 per 25 mm, the crimp rate is 14% - 18%, and the boiling water shrinkage rate is 60 - 80%. The highly shrinkable polyethylene furandicarboxylate fibers prepared by the present invention are 100% highly shrinkable polyester fibers, and the fiber properties far exceed those of conventional highly shrinkable fibers, and can become an alternative product to PET.

The invention relates to the technical field of bio-based polyester synthesis, in particular to a preparation method of poly (ethylene 2, 5-furandicarboxylate). Comprising the following steps: purification of 2, 5-furandicarboxylic acid: purifying the 2, 5-furandicarboxylic acid by sequentially adopting activated carbon, dealdehyding resin and a modified adsorbent, so that the content of acyl furoic acid, furoic acid and aldehyde impurities can be effectively reduced, side reactions are reduced, and the chroma of a finished product is reduced. Adding the purified 2, 5-furandicarboxylic acid, ethylene glycol, a composite catalyst and a composite stabilizer into a reaction container, and carrying out esterification reaction and polycondensation reaction to obtain 2, 5-furandicarboxylic acid glycol ester; a mixture of aluminum acetylacetonate, antimony triphenyl diacetate and zinc acetate is used as a catalyst of poly (ethylene 2, 5-furandicarboxylate), so that the color of PEF can be effectively improved.

The invention relates to a method for preparing high-molecular-weight polyethylene furandicarboxylate by a one-step method, and belongs to the technical field of bio-based polyester materials. The method comprises the following steps: weighing raw materials including 2, 5-furandicarboxylic acid, ethylene glycol, an end group regulator, a protective agent, a decarboxylation inhibitor and a catalyst, mixing and adding into a reaction container, introducing nitrogen, maintaining the pressure of the nitrogen in the reaction container to be 50-150 kPa, carrying out esterification reaction, heating and vacuumizing until the pressure is less than or equal to 50 Pa after the esterification reaction is completed, and carrying out polycondensation reaction to obtain the 2, 5-furandicarboxylic acid. And carrying out extrusion and drying so as to obtain the high-molecular-weight polyethylene furandicarboxylate, wherein the high-molecular-weight polyethylene furandicarboxylate is obtained. According to the method, the FDCA conversion rate is larger than or equal to 98%, the number-average molecular weight of the obtained product is larger than or equal to 32 kg / mol, no heavy metal residues exist, and the method is suitable for large-scale production of high-end bio-based packaging materials.

The invention particularly relates to a glass fiber reinforced composite plastic and a preparation method thereof, and the composite plastic comprises the following raw materials in parts by weight: 55-65 parts of PBT, 30-40 parts of PC, 25-35 parts of glass fiber, 2-4 parts of poly (2, 2, 6-trimethyl-1, 3-pentanediol monoisobutyrate), 1-3 parts of a compatilizer, 1- The material is prepared from the following components in parts by weight: 10-15 parts of ethylene glycol furandicarboxylate, 5-10 parts of a compatilizer, 4-10 parts of maleic anhydride grafted polyolefin elastomer, 3-8 parts of a silane coupling agent, 2-6 parts of an antioxidant, 1-5 parts of a lubricant and 5-12 parts of a synergistic aid. The PBT, the PC and the poly (ethylene 2, 5-furandicarboxylate) are compounded to serve as matrix plastic, the glass fibers are added for reinforcement, and the matrix plastic and the compatilizer, the maleic anhydride grafted polyolefin elastomer, the synergistic additive and other raw materials have a synergistic effect, so that the prepared glass fiber reinforced composite plastic has good mechanical properties, chemical resistance and wear resistance, and the service life of the plastic is prolonged. The preparation method is stable in process, convenient to control and high in production efficiency.

An environmentally friendly fresh-keeping can and a method of manufacturing the same are provided. The environmentally friendly fresh-keeping can includes a housing, an inner container, an easy-open lid, and a bottom cover. The housing, the inner container, the easy-open lid, and the bottom cover are respectively made of a spiral paper tube, bio-based polyethylene 2,5-furanoate (PEF), aluminum, and biodegradable plastic. The inner container is mounted into the housing through an inner opening on a top of the inner container. Then the easy-open lid and the bottom cover are respectively used to seal the inner opening of the inner container and a bottom opening of the housing. The respective components are made of biodegradable, recyclable and reusable materials and able to be disassembled for recycling and reuse. Thereby the can meets requirements for environmental protection and recycling.

The invention discloses a food packaging bag and a preparation method thereof, and belongs to the technical field of packaging bags, the food packaging bag is prepared from the following raw materials in parts by weight: 28-38 parts of polylactic acid, 2-12 parts of poly-2, 5-butylene furandicarboxylate, 2-5 parts of POSS-based compatibilizing component and 0.6-1.2 parts of modified zero-valent nano-iron, the preparation method of the packaging bag comprises the following steps: mixing the polylactic acid, the poly-2, 5-butylene furandicarboxylate, the POSS-based compatibilizing component and the modified zero-valent nano-iron, and uniformly stirring; the preparation method comprises the following steps: respectively drying 1, 3, 5-butylene furandicarboxylate in an oven at 80 DEG C for 12 hours, then adding the dried 1, 3, 5-butylene furandicarboxylate, the POSS-based compatibilizing component and the modified zero-valent nano-iron into a mixer, stirring for 30 minutes, transferring into a screw extruder, carrying out melt extrusion to obtain composite material particles, preparing the composite material particles into a food packaging film by adopting a tape casting method, and then cutting to obtain the food packaging bag. The packaging bag not only has good biodegradability, but also has good mechanical properties and an excellent fresh-keeping effect.

The present invention discloses a method for alkylating polyester materials in which carbonate or carboxylate participates, and relates to comprehensive utilization of waste resources and cascade utilization of raw materials. The product of the method of the present invention is carboxylate and ethylene carbonate or diol. Taking PET as an example, the method uses multiple types of green ionic liquid catalysts, multiple types of carbonate or carboxylate such as dimethyl carbonate (DMC) or dimethyl malonate as methyl sources, and realizes the directional upgrading of PET to DMT under methanol-free conditions, and then DMC captures the generated ethylene glycol in situ, and forms five-membered cyclic ethylene carbonate through dehydration and cyclization. The present invention can be used for the depolymerization upgrading of waste PET materials, and other aromatic or alkyl carboxylic acid compounds (benzoic acid, p-methylbenzoic acid, 4-formylbenzoic acid, cyclohexanoic acid and n-pentanoic acid), similar polyesters and polycarbonates (polyethylene succinate, polyethylene adipate and polyethylene 2,5-furandicarboxylate) are also suitable for the recovery strategy of the present invention.

The invention discloses a colored poly (ethylene 2, 5-furandicarboxylate) fiber, which comprises 2, 5-furandicarboxylate, ethylene glycol, a catalyst, a cross-linking agent and a pigment, and the pigment is a bio-based dye or a coloring agent. The invention further discloses a preparation method of the colored polyethylene 2, 5-furandicarboxylate fiber, and the polyethylene 2, 5-furandicarboxylate fiber obtained by polymerizing and spinning polyethylene 2, 5-furandicarboxylate and ethylene glycol is efficiently dyed by utilizing the bio-based dye subjected to ultrasonic treatment. The dyeing carrier or the dyeing auxiliary is added in the dyeing process of the poly (ethylene 2, 5-furandicarboxylate) fiber, the affinity between the bio-based dye and the fiber can be improved, the dyeing performance is further improved, the pre-mordanting treatment is performed through the metal ions, the dye and the metal ions are matched, and the dyeing effect is improved. Therefore, the energy level interval of electron transition of a dye color development system is changed, and the color and color fastness of the dye are effectively changed.

The invention discloses a bio-based polyamide nanofiltration membrane and application thereof, and belongs to the technical field of synthesis of bio-based polyamide nanofiltration membranes and purification of 5-hydroxymethylfurfural and 2, 5-furandicarboxylic acid. According to the invention, 2, 5-dimethyl furandicarboxylate and hexamethylenediamine are used as raw materials, polydimethyl furandicarboxylate hexamethylenediamine prepared by an amine ester exchange method is used as a film-forming polymer, and a solution phase inversion method is further adopted to prepare the bio-based polyamide nanofiltration membrane polydimethyl furandicarboxylate hexamethylenediamine membrane. The method has the advantages that 5-hydroxymethylfurfural and soluble humin can be selectively separated by the aid of the method, impurities in 2, 5-furandicarboxylic acid sodium salt aqueous solution can be separated, and accordingly the high-purity 5-hydroxymethylfurfural and 2, 5-furandicarboxylic acid can be prepared.

The invention belongs to the technical field of blown film preparation, and relates to a bio-based poly (butylene furandicarboxylate) blown film and a preparation method thereof, and the blown film is prepared from poly (butylene furandicarboxylate) with specific molecular weight and functional master batch. The preparation method comprises the following steps: step A, preparing polybutylene furandicarboxylate; and step B, preparing the polyfurandicarboxylic acid butanediol blown film. The butanediol furandicarboxylate blown film not only shows excellent thermal stability and mechanical strength, but also has good antibacterial and barrier properties, so that the film is applicable to the fields of food, medicine packaging, agricultural films and the like. The invention aims to provide an environment-friendly high polymer material blown film completely derived from biomass, so as to reduce plastic pollution and provide a sustainable material choice.

The present invention discloses a furandicarboxylate bio-based crosslinkable elastomer and a preparation method thereof. The preparation method comprises: uniformly mixing furandicarboxylate or furandicarboxylate, a linear saturated dibasic acid or linear saturated dibasic acid ester, a linear unsaturated dibasic acid or linear unsaturated dibasic acid ester, and a diol; adding a catalyst and an antioxidant; heating the mixture to above 150°C; gradually heating the mixture under an inert atmosphere; and reacting the mixture at 150-190°C for 3-7 hours to obtain an intermediate product; stirring the intermediate product for a polycondensation reaction at a vacuum degree of 30-400 Pa and a temperature of 200-260°C for 3-8 hours to obtain a crude product; and dissolving, washing, and drying the crude product to obtain a finished product. The polyfurandicarboxylate bio-based elastomer prepared by the present invention has good mechanical properties and processing properties; and the composite material after crosslinking and filler reinforcement can greatly improve tensile strength, good resilience, low permanent deformation, and high tensile strength.

The invention relates to the field of textile fabrics, and discloses a polylactic acid fabric and a preparation method thereof. The polylactic acid fabric is prepared by weaving polylactic acid fibers, the polylactic acid fibers are prepared by melt spinning of a polylactic acid material body, and the polylactic acid material body is prepared from the following raw materials in parts by weight: 100-120 parts of polylactic acid resin, 12-20 parts of a heat-resistant moisture absorbent, 6-10 parts of a toughening agent and 0.2-0.4 part of an antioxidant; the heat-resistant moisture absorbent is prepared from lignin fibers, poly (ethylene 2, 5-furandicarboxylate), poly (butylene adipate-co-terephthalate) and a dispersing agent. The preparation method comprises the following steps of melt spinning, rib knitting, heat setting, dyeing and aftertreatment. The polylactic acid fabric prepared by the invention has better heat resistance, moisture absorption and shrink deformation resistance, and is suitable for scenes with higher requirements on heat resistance and moisture absorption, such as underwear or infant clothes.

The invention relates to polyfurandicarboxylic acid glycol ester resin as well as a preparation method and application thereof, and belongs to the technical field of organic high-molecular compounds. The preparation method of the polyethylene furandicarboxylate resin provided by the invention comprises the following steps: S1, mixing 2, 5-furandicarboxylic acid, ethylene glycol, a catalyst and an inhibitor, and carrying out esterification reaction to obtain an ester; and S2, carrying out low-pressure condensation polymerization on the ester obtained in the step S1 to obtain the polyethylene furandicarboxylate resin, the inhibitor is ethylene carbonate; according to the GB / T14571.2-2018 standard, based on the chromatographic purity of the ethylene glycol, the chromatographic peak area of the inhibitor in the mixture of the ethylene glycol and the inhibitor is 0.05%-0.6% of the sum of the chromatographic peak area of the inhibitor and the chromatographic peak area of the ethylene glycol. The preparation method can effectively reduce the content of acetaldehyde in the polyethylene furandicarboxylate resin.

The invention relates to the technical field of optical thin films, and particularly discloses a bio-based laminated film and a preparation method thereof. The laminated film is obtained by alternately laminating two kinds of resin with different refractive indexes, one kind of resin is bio-based polyester resin, the refractive index difference value between the two kinds of resin is larger than or equal to 0.05, and the laminated film reflects light with the wavelength ranging from 300 nm to 1200 nm; the bio-based polyester resin is poly (ethylene 2, 5-furandicarboxylate) or polyhydroxyalkanoate; the laminated film has the characteristic of biodegradation, and the mechanical property and the optical property of the laminated film can be improved at the same time.

The present invention provides a novel means for degrading PEF. Provided is a method for degrading polyethylene furanoate that includes causing an enzyme comprising a polypeptide which has an amino acid sequence having at least 90% identity with the amino acid sequence of SEQ ID NO: 1 and has one or more amino acid substitutions selected from the group consisting of H129W, F208S, A172C, and A209C to act on polyethylene furanoate.

The application discloses a colored poly(ethylene-2,5-furandicarboxylate) fiber, which comprises 2,5-furandicarboxylic acid, ethylene glycol, a catalyst, a crosslinking agent and a pigment, and the pigment is a bio-based dye or a colorant. The application further discloses a preparation method of the colored poly(ethylene-2,5-furandicarboxylate) fiber. Bio-based dyes treated by ultrasonic waves are used to efficiently dye poly(ethylene-2,5-furandicarboxylate) fibers obtained by polymerization and spinning of poly(2,5-furandicarboxylic acid) and ethylene glycol. In the dyeing process of the poly(ethylene-2,5-furandicarboxylate) fiber, dyeing carriers or dyeing auxiliaries are added, so that the affinity between the bio-based dyes and the fiber can be improved, the dyeing performance is further improved, and a pre-mordanting treatment is performed through metal ions, so that the dyes and the metal ions form a coordination, the energy level interval of an electron transition of a dye color system is changed, and then the color and the dyeing fastness of the dyes are effectively changed.

The invention discloses a bio-based low-carbon environment-friendly functional furan polyester fiber and a preparation method thereof. The invention belongs to the technical field of macromolecules, and particularly relates to a polyfurandicarboxylic acid cyclohexanedimethanol-ethylene glycol copolyester fiber. The invention also provides a preparation method of the bio-based furan copolyester, and the bio-based furan copolyester obtained according to the preparation method provided by the invention has higher crystallinity and crystallization rate, excellent fiber mechanical properties and remarkable antibacterial property, and is a sustainable environment-friendly fiber with good comprehensive properties. The bio-based furan copolyester fiber and the like can be widely applied to the related fields of conventional clothes, home textiles and the like.

The application relates to the field of protective films, and discloses a printed stretch film and a preparation method thereof. The printed stretch film is prepared from the following raw materials in parts by weight: 95-105 parts of polyethylene resin, 5-10 parts of nano-barium sulfate, 15-20 parts of tackifying masterbatch, 4-8 parts of stabilizer, 3-5 parts of lubricant and 2-4 parts of antioxidant; the tackifying masterbatch is composed of poly(ethylene-2,5-furandicarboxylate), dibutyl itaconate, polyhydroxyalkanoate and cyclohexane-1,2-dicarboxylic acid diglycidyl ester; the printed stretch film prepared by the application has good printability, scratch resistance, elongation at break and resistance to shrinkage and deformation, and has good applicability in protective films requiring printing ink; when the printed stretch film is used in packaging cartons, PET film and other packaging materials requiring color printing, the printed stretch film has good protective property and scratch resistance.

A method of producing an oligofuran moiety-containing polycarbosilane, the method including a polymerization step of reacting a dihydrosilyloligofuran compound with a diene compound and / or diyne compound in the presence of ahydrosilylation catalyst in which method the dihydrosilyloligofuran compound being a compound having a 2- to 256-mer of a furan ring and a hydrosilyl group at the α-position of each of both terminal furan rings of the 2- to 256-mer of the furan ring.

The invention relates to the technical field of biomass-based polyfuran polymer materials, in particular to a flexibility-adjustable biomass-based polyfuran polymer material and a preparation method thereof. A molecular structure of a conventional bio-based fat chain high-molecular polymer lacks a rigid structure, so that the heat resistance and the mechanical property are obviously lower than those of a petroleum-based high-molecular material. Aiming at the technical problems, the invention provides the flexibility-adjustable biomass-based polyfuran high-molecular material which is a product obtained by carrying out aldol condensation reaction on furan dicarboxaldehyde and diketone or polyketone under the action of a catalyst, and a molecular skeleton of the flexibility-adjustable biomass-based polyfuran high-molecular material consists of aromatic rings and carbon-carbon chains and does not contain heteroatoms; the biomass-based polyfuran polymer material is similar to a molecular skeleton of phenolic resin and has a lower carbon footprint, an aromatic furan ring in a molecular structure is connected with a double bond, and the flexibility of the biomass-based polyfuran polymer material can be adjusted by changing the type of diketone or polyketone.

The invention discloses a bio-based polyester / aramid fiber composite paper-based material and a preparation method thereof, relates to the technical field of paper-based materials, and solves the problems that an existing aramid paper-based material product is poor in appearance, mechanical property and insulating property. The aramid fiber composite material comprises the following components in parts by weight: 40-70 parts of aramid chopped fiber, 20-50 parts of aramid fibrid and 10-40 parts of poly (ethylene 2, 5-furandicarboxylate) (PEF) fiber. The length of the aramid chopped fibers is 5-7 mm, and the length of the PEF fibers is 3-6 mm. The composite paper-based material is quantified to be 25-250 g / m < 2 >, and the thickness is 0.04-0.25 mm. Uniformly mixing the aramid chopped fiber pulp, the PEF fiber pulp and the aramid fibrid pulp, and carrying out wet papermaking forming, squeezing and drying to obtain raw paper; and carrying out hot pressing treatment through multiple groups of temperature increasing type preheating rollers, hot pressing rollers and multiple groups of temperature decreasing type heat preservation rollers. The method can be used in the fields of aerospace, rail transit, new energy, national defense and military industry and the like.

Low-density, thermoplastic foams comprising: (a) thermoplastic polymer cells comprising cell walls comprising polyethylene furanoate, wherein at least about 50% by volume of the cells are closed cells

The invention provides a preparation method of low-color-value polyethylene furandicarboxylate. The germanium-titanium composite catalyst is used as the catalyst for preparing the polyethylene furandicarboxylate, so that the problems of slow reaction and dark color of the polyethylene furandicarboxylate are solved. According to the preparation method of the polyethylene furandicarboxylate, all the raw materials are only added before the reaction, additives or other catalysts do not need to be added in the middle process, the process is very simple, the process is environment-friendly, and industrialization is facilitated.