摘要:
A polypropylene derivative is provided. The polypropylene derivative includes a reactive monomer grafted on polypropylene, with a grafting yield exceeding 5%. A method of preparing the polypropylene derivative is also disclosed. The method includes mixing a reactive monomer, polypropylene, and a compatibilizer in a twin screw extruder to prepare a polypropylene derivative with reactive monomers grafted thereon, with a grafting ratio exceeding 5%.
摘要:
A polypropylene derivative is provided. The polypropylene derivative includes a reactive monomer grafted on polypropylene, with a grafting yield exceeding 5%. A method for preparing the polypropylene derivative is also disclosed. The method includes mixing a reactive monomer, polypropylene and a compatibilizer to prepare a polypropylene derivative grafted with the reactive monomer, with a grafting yield exceeding 5%.
摘要:
An activated carbon fiber for fabricating a supercapacitor electrode and its precursor material are provided. The precursor material of the activated carbon fiber includes polyacrylonitrile (PAN) and a polymer having formula (I): wherein R1 is cyano, phenyl, acetate, or methoxycarbonyl, R2 is R3 is C1-7 alkyl, X is chlorine, bromine, tetrafluoroborate (BF4), hexafluorophosphate (PF6), or NH(SO2CH3)2, and m/n is 1-99/99-1.
摘要:
Free radical polymerization process for preparing polymers with low polydispersity index and polymers obtained thereby. The process includes polymerizing at least one reactive monomer with at least one initiator and at least one ionic liquid (serving as solvent) to obtain polymers having a low polydispersity index of less than 1.5, wherein the reactive monomer is a nitrogen-containing monomer. In addition, the free radical polymerization processes have reaction time within 3 hours.
摘要:
A method of preparing an aliphatic copolyester by mixing a first compound defined by the equation: and a catalyst, and adding a second compound defined by and a lactide, wherein the second compound and the lactide have a total weight less than the first compound, wherein a is 10-230, b, d and e have a ratio of 10-35:10-35:80-30, c is 1-4, and f is 1-10. The method further adds the second compound and the lactide, wherein the second compound and the lactide have a total weight less than the first compound, the second compound and the lactide in the prior mixing step. The method further adds the second compound and the lactide, wherein the second compound and the lactide have a total weight less than the first compound, the second compound and the lactide in of the prior mixing steps.
摘要:
An activated carbon fiber for fabricating a supercapacitor electrode and its precursor material are provided. The precursor material of the activated carbon fiber includes polyacrylonitrile (PAN) and a polymer having formula (I): wherein R1 is cyano, phenyl, acetate, or methoxycarbonyl, R2 is R3 is C1-7 alkyl, X is chlorine, bromine, tetrafluoroborate (BF4), hexafluorophosphate (PF6), or NH(SO2CH3)2, and m/n is 1-99/99-1.
摘要:
A method for preparing a nylon 6 copolymer containing dimeric acid comonomers. The method includes reacting 80.0˜99.9 mol % of caprolactam, 0.1˜3.0 mol % of dimeric acid and 0.1˜3.0 mol % of 2-methyl-1,5-pentadiamine in a polymerization reaction. Moreover, the invention provides a method for preparing a nylon 66 copolymer containing dimeric acid comonomers, which comprising reacting 60.0˜90 mol % of hexadiacid and hexadiamine, 0.1˜3.0 mol % of dimeric acid and 0.1-3.0 mol % of 2-methyl-1,5-pentadiamine in a polymerization reaction. The reaction temperature for both of the methods are at 200˜280° C.
摘要:
An aliphatic copolyester is provided. The aliphatic copolyester is prepared by polymerization of a first compound having formula I, a second compound having formula II, and a lactide, wherein a is 10-230, b, d and e have a ratio of 10-35:10-35:80-30, c is 1-4, and f is 1-10. The invention also provides a method of preparing the aliphatic copolyester.
摘要:
A method for preparing nylon 6 copolymer containing 5-sulfoisophthalate salts comonomer. The method includes the steps of reacting 5-sulfoisophthalate salts ester with aliphatic diamine in a molar ratio of 2˜20 at 160˜200° C., followed by completely removing the unreacted aliphatic diamine, to obtain the intermediate compound with terminal amine, 5-sulfobenzenediamide compound (formula III). Next, caprolactam and aliphatic diacid (formula IV) are reacted at 200˜260° C. to form an oligomer with a low molecular weight. 5-Sulfobenzenediamide (formula III) and catalyst are then added into the oligomer obtained in previous step to cause a polymerization reaction at 200˜280° C. to obtain nylon 6 copolymer containing 5-sulfoisophthalate salt comonomer. The molar ratio of E/C is 0.005˜0.150 and the molar ratio of D/E is 1.05-1.00. Compounds present in the water extract are greatly reduced.
摘要:
A plasticizing agent and a composition for fabricating a polyacrylonitrile-based fiber precursor and a fabrication method of a polyacrylonitrile-based carbon fiber are provided. The plasticizing agent includes a copolymer represented by formula (I) or a derivative of formula (I): wherein R is methyl or ethyl, z≧0.5 mol %, and y=99.5-85.0 mol %. The plasticizing agent has an intrinsic viscosity of between 0.20-0.40 dL/g. The composition for fabricating the polyacrylonitrile-based fiber precursor includes the plasticizing agent and a polyacrylonitrile-based copolymer having an intrinsic viscosity of between 0.41-0.75 dL/g.