Abstract: The present invention relates to a copolyester that includes following structural units: a first chain segment shown in Formula (I): and a second chain segment shown in Formula (II): where the glass transition temperature (Tg) of the copolyester is 60° C. to 83° C. The present invention also provides a polyester fiber or packaging material containing the copolyester.

Abstract: The present invention relates to a copolyester that includes following structural units: a first chain segment shown in Formula (I): and a second chain segment shown in Formula (II): where the glass transition temperature (Tg) of the copolyester is 60° C. to 83° C. The present invention also provides a polyester fiber or packaging material containing the copolyester.

Abstract: A process for preparing 5-hydroxymethylfurfural includes the steps of: subjecting a glucose-containing material to a catalytic reaction in the presence of an isomerase enzyme to form an aqueous saccharide solution containing fructose and glucose, converting the fructose into 5-hydroxymethylfurfural via a first dehydration reaction, and converting the glucose into 5-hydroxymethylfurfural via a second dehydration reaction.

Abstract: A process for producing ethylene from an ethanol feedstock comprises a step of subjecting the ethanol feedstock to a dehydration reaction in the presence of a supported heteropolyacid salt catalyst. The supported heteropolyacid salt catalyst includes a support and a heteropolyacid salt compound which is carried on the support and which is represented by a formula as defined herein.

Abstract: A method for producing terephthalic acid comprises the steps of: subjecting methyl acrylate to contact with aluminum chloride so as to form a complex; adding isoprene to the complex to result in a Diels-Alder reaction which is kept at a temperature no higher than 50° C. by cooling so as to obtain a cyclic adduct product; subjecting the cyclic adduct product to separation so as to obtain a cyclic para-precursor; and subjecting the cyclic para-precursor to a chemical reaction so as to obtain terephthalic acid.

Abstract: An oxygen-scavenging composition includes a sulfide group-containing polyester and a catalyst. The sulfide group-containing polyester is obtained by subjecting a reaction composition to esterification and condensation reactions. The reaction composition includes an aromatic diacid component and a diol component including aliphatic diol and a diol compound represented by the following formula (I): HO—(X1—O)n—X3—S—X4—(O—X2)m—OH??(I) wherein X1 and X2 independently represent a C1-C6 alkylene group, X3 and X4 represent a C6-C10 arylene group, and m and n represent an integer ranging from 1 to 5. The catalyst is for inducing reaction between the sulfide group-containing polyester and oxygen.

Abstract: A biocidal polymer including at least one repeating unit of formula (A): wherein: R1 in each occurrence independently represents a divalent aromatic group containing 6 to 30 carbon atoms, a C2-C16 alkylene group or an alkylene biscyclohexyl; Y in each occurrence independently represents an oxygen atom or a sulfur atom; and Z1, Z2, Z3 and Z4 in each occurrence independently represent a hydrogen atom or a halogen atom; wherein at least one of Z1, Z2, Z3 and Z4 in the at least one repeating unit of formula (A) is a halogen atom.

Abstract: A platelet adhesion-resistant material is provided, which includes polytriuret-urethane consisting essentially of repeating structural units of formulae (I) to (III) in a random order, in which when the total number of the three repeating structural units in the polytriuret-urethane is 100, the number of the repeating structural units (I) is about 5 to about 50: in which each R independently represents a C2-C16 alkylene group, a C6-C30 aromatic group, a C6-C30 alicyclic group; n is an integer of 2 to 16; and R1 represents —(OCmH2m)p, in which m is an integer of 2 to 5, and p is an integer of 3 to 150.

Abstract: An amphiphilic polymer having the following formula (I): wherein Z is a hydroxyl-substituted aliphatic group having formula (Z1) or (Z2): wherein R11 and R21 are independently hydrogen, hydroxyl, hydroxymethyl, methyl, or a C1-C20 alkyl group, and R12, R13, R14, R22, R23, and R24 are independently hydrogen, hydroxyl, or a sugar moiety; X is a C1-C6 divalent aliphatic group; and Y is a biodegradable group having the following formula (II): wherein R? is a hydrocarbyl group or a polyester block having the following formula (II-A), wherein, in each occurrence, R is hydrogen or a C1-C18 alkyl group, m is an integer ranging from 0 to 5, and n is an integer ranging from 10 to 300.

Abstract: Disclosed herein is a biocidal polymer including at least one repeating unit of formula (A): wherein: R1 in each occurrence independently represents a divalent aromatic group containing 6 to 30 carbon atoms, a C2-C16 alkylene group or an alkylene biscyclohexyl; Y in each occurrence independently represents an oxygen atom or a sulfur atom; and Z1, Z2, Z3 and Z4 in each occurrence independently represent a hydrogen atom or a halogen atom; wherein at least one of Z1, Z2, Z3 and Z4 in the at least one repeating unit of formula (A) is a halogen atom. The preparation process and applications of the biocidal polymer are also disclosed.

Abstract: An amphiphilic polymer having the following formula (I): wherein Z is a hydroxyl-substituted aliphatic group derived from a sugar moiety and having formula (Z1) or (Z2): wherein R11 and R21 are independently hydrogen, hydroxyl, hydroxymethyl, methyl, or a C1-C20 alkyl group; R12, R13, R14, R22, R23, and R24 are independently hydrogen, hydroxyl, or a sugar moiety; X is a C1-C6 divalent aliphatic group; and Y is a biodegradable polyester block having a repeating unit represented by the following formula (II): wherein, in each repeating unit, R is hydrogen or a C1-C18 alkyl group, m is an integer ranging from 0 to 5, and n is an integer ranging from 10 to 300. A method for preparing the amphiphilic polymer is also disclosed.