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A kind of high tenacity PBT antibacterial composite material and preparation method thereof

A composite material and high-toughness technology, which is applied in the field of high-toughness polybutylene terephthalate antibacterial composite material and its preparation field, can solve the problems of poor flow stability of PBT, etc., and achieve improved antibacterial performance and high impact strength , the effect of high toughness

Active Publication Date: 2021-10-29
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PBT and vinyl acetate-based copolymers are melt-blended in a screw extruder / internal mixer, and the epoxy groups on the vinyl acetate-based copolymers react with the carboxyl or terminal hydroxyl groups on PBT to achieve reaction compatibilization , so as to achieve a good toughening effect; at the same time, the vinyl acetate-based copolymer can also have a chain extension effect on PBT, forming a special comb-like copolymer structure, which significantly improves the melt strength of PBT and solves the problem of PBT Problems with poor flow stability due to low melt strength

Method used

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  • A kind of high tenacity PBT antibacterial composite material and preparation method thereof
  • A kind of high tenacity PBT antibacterial composite material and preparation method thereof
  • A kind of high tenacity PBT antibacterial composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] With 80 parts of PBT, 20 parts of vinyl acetate-based copolymers (the mass content of vinyl acetate is 60%, and the mass content of glycidyl methacrylate is 3.1%) are pre-mixed at room temperature, and then the pre-mixture is made by twin-screw A high-toughness PBT composite material can be obtained by continuous melt extrusion of an extruder (extrusion temperature is 240° C., screw speed is 150 rpm).

Embodiment 2

[0037] With 75 parts of PBT, 8 parts of vinyl acetate-based copolymers (the mass content of vinyl acetate is 50%, and the mass content of glycidyl methacrylate is 5%), ethylene-vinyl acetate binary copolymer (the mass content of vinyl acetate Content is 50%) 17 parts, β-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate 0.2 part, pentaerythritol stearate 0.1 part, premixed at room temperature , and then the premix is ​​continuously melt-extruded by a twin-screw extruder (the extrusion temperature is 235° C., and the screw speed is 180 rpm) to obtain a high-toughness PBT composite material.

Embodiment 3

[0039] With 80 parts of PBT, 5 parts of vinyl acetate-based copolymers (the mass content of vinyl acetate is 60%, and the mass content of glycidyl methacrylate is 3.1%), ethylene-vinyl acetate binary copolymer (the mass content of vinyl acetate content is 50%) 15 parts, tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol 0.5 parts premixed at room temperature, and then add the premixed mixture Melt blending in the machine for 8 minutes (the blending temperature is 230° C.) can obtain a high-toughness PBT composite material.

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Abstract

The invention discloses a high-toughness antibacterial PBT composite material and a preparation method thereof, belonging to the technical field of polymer processing. The composite material of the present invention comprises 65-90 parts of PBT, 5-35 parts of vinyl acetate-based copolymer, 0.1-4 parts of antibacterial agent, and 0.05-3 parts of chain extender; wherein the mass of vinyl acetate in the vinyl acetate-based copolymer The content is 45-75%. The copolymer also contains at least ethylene structural units. The composite material of the invention has good toughness, high strength and excellent antibacterial performance, and can be applied to the fields of fibers and fabrics, plastic packaging, automotive interior parts, medical consumables and the like.

Description

technical field [0001] The invention relates to a polybutylene terephthalate (PBT) antibacterial composite material with high toughness and a preparation method thereof, belonging to the technical field of polymer processing. Background technique [0002] Polybutylene terephthalate (PBT) plastic is widely used in automobiles, electronic appliances, industrial machinery and other fields because of its high strength, fatigue resistance, dimensional stability, small creep, heat aging resistance, and good processability. But PBT also has obvious disadvantages, for example, it is very sensitive to the notch, and the notch impact strength is low, which is its main disadvantage as an engineering plastic, and the lack of toughness has also become a major obstacle to popularization and application. Therefore, the study on the toughening modification of PBT has always been an important content of PBT high performance. Both patents CN106280302A and CN106496452A adopt elastomer as a to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L31/04C08L23/08C08K5/134C08K5/103C08K5/20C08K5/526C08K3/22
CPCC08K2003/2213C08K2003/2241C08K2003/2286C08K2003/2296C08L67/02C08L2205/03C08L31/04C08L23/0853C08K5/1345C08K5/103C08K5/20C08K5/526C08K3/22
Inventor 马丕明吴保钩操莹徐鹏武杨伟军东为富
Owner JIANGNAN UNIV