The invention concerns a method for producing a polyester containing at least one 1,4:3,6-dianhydrohexitol unit comprising:.Math.a step of introducing, into a reactor, monomers comprising at least one monomer (A) that is a diacid or a diester and at least one monomer (B) that is a 1,4:3,6-dianhydrohexitol;.Math.a step of introducing, into the reactor, a catalytic system comprising either a catalyst comprising the element germanium and a catalyst comprising the element aluminum, or a catalyst comprising the elements germanium and aluminum, or a mixture of said two catalysts;.Math.a step of polymerising said monomers to form the polyester;.Math.a step of recovering a polyester composition comprising the polyester and the catalytic system. The invention also concerns a polyester composition containing a catalytic system comprising either a catalyst comprising the element germanium and a catalyst comprising the element aluminum, or a catalyst comprising the elements germanium and aluminum, or a mixture of said two catalysts, and the use of same to reduce the colouring of the polyester.

A method of producing copolyester material with peptide and is disclosed. The method includes: putting ethylene glycol, collagen peptide and Benzenedicarboxylic acid into a container, and mixing them to form a mixture; heating the mixture for executing an esterification reaction, to product esters and water; heating the esters to a first temperature, and stirring the esters via a mixer; in a specific period, decreasing the pressure in the container to a first pressure for executing a polycondensation reaction; decreasing the pressure in the container to a second pressure, and stirring the esters via the mixer, to produce a copolyester material with peptide.

A method of producing copolyester material with peptide and is disclosed. The method includes: putting ethylene glycol, collagen peptide and Benzenedicarboxylic acid into a container, and mixing them to form a mixture; heating the mixture for executing an esterification reaction, to product esters and water; heating the esters to a first temperature, and stirring the esters via a mixer; in a specific period, decreasing the pressure in the container to a first pressure for executing a polycondensation reaction; decreasing the pressure in the container to a second pressure, and stirring the esters via the mixer, to produce a copolyester material with peptide.

The present invention relates to a polycyclohexylenedimethylene terephthalate (PCT) resin having enhanced crystallization speed and a method for preparing same. A PCT resin, according to an embodiment of the present invention, comprises: a reactant of (A) a dicarboxylic acid compound or a dicarboxylic acid ester compound and (B) a diol compound total of which 90 mol % or more is cyclohexanedimethanol; and 10-1000 ppm of antimony (Sb) atoms on the basis of the total weight of the resin, wherein the differential between the melting point (Tm) and a reduced crystallization temperature (Tmc) is 45° C. or lower. A PCT resin, according to the present invention, has high crystallization speed and thus enables fast production of various molded products. In particular, the PCT resin has high crystallization temperature and high heat resistance and thus enables fast production of a high-quality heat-resistant molded product by means of injection molding.

The present invention relates to a polycyclohexylenedimethylene terephthalate (PCT) resin having enhanced crystallization speed and a method for preparing same. A PCT resin, according to an embodiment of the present invention, comprises: a reactant of (A) a dicarboxylic acid compound or a dicarboxylic acid ester compound and (B) a diol compound total of which 90 mol % or more is cyclohexanedimethanol; and 10-1000 ppm of antimony (Sb) atoms on the basis of the total weight of the resin, wherein the differential between the melting point (Tm) and a reduced crystallization temperature (Tmc) is 45° C. or lower. A PCT resin, according to the present invention, has high crystallization speed and thus enables fast production of various molded products. In particular, the PCT resin has high crystallization temperature and high heat resistance and thus enables fast production of a high-quality heat-resistant molded product by means of injection molding.

Surface micro-texturing has been proven an effective way to reduce friction and wear for tribological applications. There is provided a low cost hot sintering method to apply micro-texturing on an advanced bearing polymer material. First, one face of the mold was micro-textured using a micro-casting method. Second, the cured Aromatic Thermosetting coPolyester (ATSP) powder was filled in the mold. Next, the filled mold was placed in a hot press for a hot sintering process. Finally, the textured bulk ATSP was cooled. The micro-textured ATSP bulk material was machined and compared with plain untextured material. The micro-textured material could effectively reduce friction at speeds lower than 2.46 m/s: 14% reduction in average.

The present invention relates to a polyester resin composition capable of having an excellent shrinkage rate, being heat-shrunk at a low temperature, and improving adhesion properties, without impairing insulation properties in a state of heat-shrinkable films, and a method for preparing the same. The present polyester resin composition comprises: a copolymerized polyester resin including a dicarboxylic acid-derived residue including a residue derived from an aromatic dicarboxylic acid; and a diol-derived residue including a residue derived from 4-(hydroxymethyl)cyclohexyl methyl 4′-(hydroxymethyl)cyclohexane carboxylate, and a residue derived from 4,4-(oxybis(methylene)bis) cyclohexane methanol, an alkali metal compound, and an alkaline earth metal compound, wherein the alkali metal compound and the alkaline earth metal compound are contained in an amount that the content ratio of the alkali metal element/the alkaline earth metal element derived therefrom is 0.01 to 1.

A family of new and novel molecules for mechanically superior two-dimensional (2D) polymers is described herein. By combining stiff carbon-containing cyclic polymer nodal units with more compliant linear polymer bridge units in an ordered, 2D repeating molecular structure it is possible to tailor the mechanical properties of 2D polymers and their assemblies to provide high stiffness, strength, and toughness. Furthermore, the inherent dimensionality of 2D polymers and their ability to be stacked into ordered and chemically interactive ensembles gives them inherent benefits in a variety of barrier and structural applications over current stiff and strong linear polymer technologies.

An organic polymeric compound called a para-Furuta polymer is characterized by polarizability and resistivity has repeating units of a general structural formula:

##STR00001##

A backbone structure of the compound comprises structural unit P, on which are n Tail repeat units and m L-Q repeat units. P is selected from acrylate, methacrylate, polypropylene repeat units, polyethylene repeat units, siloxane, and polyethylene terephthalate repeat units. Tail repeat units are resistive substitutes that are oligomers of polymeric material. L-Q repeat units have j ionic functional groups Q connected to the structural unit P via a linker group L. The ionic functional groups Q comprise one or more ionic liquid ions, zwitterions, polymeric acids, or any combination thereof. Parameter t is the average number of repeating units of para-Furuta polymer. There are s are counter ions B which are molecules or oligomers that supply an opposite charge to balance a charge of the compound, s is number of the counter ions.

An organic polymeric compound called a para-Furuta polymer is characterized by polarizability and resistivity has repeating units of a general structural formula:

##STR00001##

A backbone structure of the compound comprises structural unit P, on which are n Tail repeat units and m L-Q repeat units. P is selected from acrylate, methacrylate, polypropylene repeat units, polyethylene repeat units, siloxane, and polyethylene terephthalate repeat units. Tail repeat units are resistive substitutes that are oligomers of polymeric material. L-Q repeat units have j ionic functional groups Q connected to the structural unit P via a linker group L. The ionic functional groups Q comprise one or more ionic liquid ions, zwitterions, polymeric acids, or any combination thereof. Parameter t is the average number of repeating units of para-Furuta polymer. There are s are counter ions B which are molecules or oligomers that supply an opposite charge to balance a charge of the compound, s is number of the counter ions.