Preparation method and application of poly(1,4-cyclohexylene dimethylene terephthalate) thin film

A technology of cyclohexanedimethanol ester and polyterephthalic acid, which is applied in the direction of flexible covering, packaging, wrapping paper, etc., can solve the problems of low viscosity and no application value, achieve high reaction efficiency and improve the molecular weight of PCT It is difficult to improve and avoid the effect of solvent contamination

Inactive Publication Date: 2017-07-14
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] XIN-HUA WAN et al. (Synthesis, Characterization, and Ring Opening Polymerization of Poly(1,4-cyclohexylene ethylene terephthalate) Cyclic Oligomers) synthesized cyclic oligomers of PCT, and then carried out solution ring-opening polymerization of cyclic oligomers to obtain PCT The viscosity range is 0.035~0.466dL / g, the viscosity is too low, so it has no application value

Method used

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  • Preparation method and application of poly(1,4-cyclohexylene dimethylene terephthalate) thin film
  • Preparation method and application of poly(1,4-cyclohexylene dimethylene terephthalate) thin film

Examples

Experimental program
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Embodiment 1

[0042] First, 62.51g of waxy 1,4-cyclohexanedimethanol was melted in a water bath at 70°C, and added to a 250ml four-necked flask. Add 60.10 g of terephthalic acid (PTA) into the four-necked flask, add 0.012 g of germanium dioxide and 0.012 g of antimony ethylene glycol, stir evenly, and then turn on the heating device. React at 235°C under normal pressure for about 4 hours until the system becomes transparent and the esterification reaction is complete. 0.012g of tetrabutyl titanate and 0.006g of cobalt acetate were dissolved in 1mL of ethylene glycol and added to the system. Raise the temperature to 270°C and evacuate to 2000Pa, react for 30 minutes; then raise the temperature to 290°C, and evacuate to 80Pa, react until the torque of the agitator no longer changes, stop the reaction, and pour the produced product into water while it is hot to quench. The above product was dissolved in 1,1,2,2-tetrachloroethane at 110°C, and purified by settling with acetone to obtain polyme...

Embodiment 2

[0047] The difference between this embodiment and Example 1 is that the addition of cobalt acetate is 0.003g, and others are the same as in Example 1, and the PCT number-average molecular weight obtained is 25003, the extended chain PCT-PMDA number-average molecular weight is 26011, and the gel content is 0.90%.

Embodiment 3

[0049] The difference between this embodiment and Example 1 is that the addition of cobalt acetate is 0.009g, and others are the same as Example 1, and the PCT number-average molecular weight obtained is 25020, the extended chain PCT-PMDA number-average molecular weight is 26104, and the gel content is 0.96%.

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Abstract

The invention provides a preparation method and an application of a poly(1,4-cyclohexylene dimethylene terephthalate) thin film. The preparation method includes the following steps: 1) preparation of poly(1,4-cyclohexylene dimethylene terephthalate): performing a condensation polymerization reaction to 1,4-cyclohexylene dimethylene terephthalate under effect of a condensation polymerization catalyst at 280-310 DEG C to obtain the poly(1,4-cyclohexylene dimethylene terephthalate) of which the molar ratio of terminal hydroxyl group to terminal carboxyl group is 1:1; 2) adding a solvent, an antimony-type catalyst, a thermal-stabilizer, and an antioxidant to the poly(1,4-cyclohexylene dimethylene terephthalate), uniformly mixing the components, removing the solvent, adding a chain extender, and performing a chain extension reaction at 250-280 DEG C to obtain a chain-extended product; and 3) processing the chain-extended product to obtain the poly(1,4-cyclohexylene dimethylene terephthalate) thin film. In the method, employed chain-extended polyester is a chain-extended product by synthesizing the chain extender and the large-molecular-weight poly(1,4-cyclohexylene dimethylene terephthalate) (PCT). The method has simple process and high reaction efficiency. The thin film has excellent mechanical performance.

Description

technical field [0001] The invention relates to a preparation method and application of a poly-1,4-cyclohexanedimethylene terephthalate film, belonging to the technical field of polymer materials. Background technique [0002] As a heat-resistant, semi-crystalline thermoplastic polymer material, polyester PCT has outstanding advantages in thermal properties, such as glass transition temperature: PBT<PTT<PA66<PET<PPS≈PCT, melting point: PTT<PBT<PET ≈PA66<PPS<PCT, its heat resistance is obviously better than PBT, PET, PA66, and can compete with PPS. In terms of crystallization performance, it also has excellent crystallization speed and low sag that PPS does not have; in the comparison of PET and PCT crystallization performance, PCT is easier to crystallize and the crystallization speed is very fast. In addition, PCT has good processability. With the increasing demand for industrial silk blow molding and thermal processing moldings, a large number of h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C08G63/183C08J5/18C08L67/02C08K5/523B65D65/38
CPCC08G63/916B65D65/38C08G63/183C08J5/18C08J2367/02C08K5/523C08L2201/08C08L2203/16
Inventor 郎美东张丽侯佳梁文城
Owner EAST CHINA UNIV OF SCI & TECH
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