摘要:
A method of making a polylactic acid based article includes: (a) providing a sheet having a crystallinity ranging from 0% to 15% and including a polylactic acid polymer composition, the polylactic acid polymer composition having a polylactic acid polymer, a copolyester polymer, and a crystal nucleating agent; (b) heating the sheet to maintain a surface of the sheet at a temperature ranging from 95° C. to 105° C. while keeping the crystallinity of the sheet lower than 20%; and (c) thermoforming the sheet in a mold having a temperature ranging from 95° C. to 130° C. so as to form a polylactic acid based article having a crystallinity ranging from 35% to 45%.
摘要:
A copolyester composition includes: an aliphatic-aromatic copolyester; a coupling agent including a compound having an epoxy functional group; and a cocatalyst including a carboxylate of manganese and a carboxylate of zinc, wherein a weight ratio of the carboxylate of manganese to the carboxylate of zinc ranges from 1:3 to 3:1, and the cocatalyst is present in an amount ranging from 0.03-0.2 part by weight based on 100 parts by weight of the aliphatic-aromatic copolyester.
摘要:
A method of making a polylactic acid based article includes: (a) providing a sheet having a crystallinity ranging from 0% to 15% and including a polylactic acid polymer composition, the polylactic acid polymer composition having a polylactic acid polymer, a copolyester polymer, and a crystal nucleating agent; (b) heating the sheet to maintain a surface of the sheet at a temperature ranging from 95° C. to 105° C. while keeping the crystallinity of the sheet lower than 20%; and (c) thermoforming the sheet in a mold having a temperature ranging from 95° C. to 130° C. so as to form a polylactic acid based article having a crystallinity ranging from 35% to 45%.
摘要:
A copolyester composition includes: an aliphatic-aromatic copolyester; a coupling agent including a compound having an epoxy functional group; and a cocatalyst including a carboxylate of manganese and a carboxylate of zinc, wherein a weight ratio of the carboxylate of manganese to the carboxylate of zinc ranges from 1:3 to 3:1, and the cocatalyst is present in an amount ranging from 0.03-0.2 part by weight based on 100 parts by weight of the aliphatic-aromatic copolyester.
摘要:
A polylactic acid composition includes polylactic acid, and a biodegradable nucleating polymer in an amount from 0.1 to 10 wt %, based on the total weight of the polylactic acid composition. The biodegradable nucleating polymer is used as a nucleating agent, and is selected from the group of aliphatic polyester other than polylactic acid, aliphatic-aromatic copolyester, and polyethylene glycol.
摘要:
A polyester based blend includes: a polyester to be formed into a polymer matrix for a packaging article when the polyester based blend is melted and extruded; an oxidative catalyst to be dispersed in the polymer matrix; and an additive of an aldehyde that is to be dispersed in the polymer matrix, that is catalytically reactive with oxygen at room temperature in the presence of the oxidative catalyst, and that has a melting point greater than room temperature. A packaging article made from the melt-extruded polyester based blend is also disclosed.
摘要:
An acetaldehyde scavenger includes: a polymerization product of at least one of an aromatic dicarboxylic acid having a carbon number from 8 to 16 and an ester derivative of the aromatic dicarboxylic acid, and a diol compound having a carbon number from 3 to 15.
摘要:
A polysiloxane-based prepolymer of a three-dimensional network structure produced by hydrolysis-condensation of a first mixture having a tetra-alkoxysilane compound, an ethylenically unsaturated organosiloxane monomer, and a hydrophilic silicon-containing polyfunctional monomer. A hydrogel is prepared by polymerizing a second mixture having the aforesaid polysiloxane-based prepolymer, an acrylated silicon-containing monomer, and an ethylenically unsaturated hydrophilic monomer.
摘要:
A polysiloxane-based prepolymer of a three-dimensional network structure produced by hydrolysis-condensation of a first mixture having a tetra-alkoxysilane compound, an ethylenically unsaturated organosiloxane monomer, and a hydrophilic silicon-containing polyfunctional monomer. A hydrogel is prepared by polymerizing a second mixture having the aforesaid polysiloxane-based prepolymer, an acrylated silicon-containing monomer, and an ethylenically unsaturated hydrophilic monomer.