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Polylactic acid composite material with high melt fluidity and preparation method thereof

A polylactic acid material and polylactic acid technology are applied in the field of high melt fluidity polylactic acid composite materials and their preparation, which can solve the problems of little research on flow aids, improve tensile strength and comprehensive performance, promote reduction, decrease The effect of improving toughness

Active Publication Date: 2021-05-25
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many types of flow aids used in polyesters such as PET and PBT, but there is little research on flow aids for polylactic acid, and flow aids for other polyesters may not be suitable for polylactic acid materials

Method used

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  • Polylactic acid composite material with high melt fluidity and preparation method thereof
  • Polylactic acid composite material with high melt fluidity and preparation method thereof
  • Polylactic acid composite material with high melt fluidity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0040] The preparation of embodiment 2 flow aid P (CL-co-LA) linear random copolymer

[0041] Add 25g dehydrated lactide, 6.89gε-caprolactone, 0.04g stannous isooctanoate, 0.17g propylene glycol to a 100ml three-necked flask, vacuum and reduce pressure, heat up and react for 24 hours to obtain a solid component, dissolve in trichloro Methane and methanol were precipitated to obtain a solid sample which was designated as P(CL-co-LA)-2.

Embodiment 3

[0042] The preparation of embodiment 3 flow aid P (CL-co-LA) linear random copolymer

[0043] Add 25g of dehydrated lactide, 17.8g of ε-caprolactone, 0.04g of stannous isooctanoate, 0.21g of ethanol to a 100ml three-necked flask, vacuum and reduce pressure, heat up and react for 24 hours to obtain a solid component, which is dissolved in trichloro Methane and methanol were precipitated to obtain a solid sample which was designated as P(CL-co-LA)-3.

Embodiment 4

[0044] The preparation of embodiment 4 flow aid P (CL-co-LA) linear random copolymer

[0045] Add 25g of dehydrated lactide, 52.6g of ε-caprolactone, 0.08g of stannous isooctanoate, 0.25g of propylene glycol into a 100ml three-necked flask, vacuum and reduce pressure, heat up and react for 24 hours to obtain a solid component, dissolve in trichloro Methane and methanol were precipitated to obtain a solid sample which was designated as P(CL-co-LA)-4.

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Abstract

The invention discloses a polylactic acid composite material with high melt fluidity and a preparation method thereof, and belongs to the technical field of polymer processing and modification. According to the invention, a lactic acid-caprolactone random copolymer is used as a flow promoter, the lactic acid-caprolactone random copolymer is blended with a polylactic acid material by controlling the addition amount, the lactic acid-caprolactone random copolymer and the polylactic acid material have good compatibility and can be uniformly dispersed, and an incompatible segment in the copolymer effectively shields entanglement of a matrix chain and improves the fluidity of a melt. The obtained composite material has high melt fluidity and improved mechanical properties. The composite material can be widely applied to the fields of plastic structural parts, thin-wall injection molding, fiber spinning, plastic packaging, automotive upholstery, medical consumables and the like, and has a wide prospect.

Description

technical field [0001] The invention relates to a polylactic acid composite material with high melt fluidity and a preparation method thereof, belonging to the technical field of polymer processing and modification. Background technique [0002] Due to the increasingly prominent problems of shortage of petroleum resources and serious environmental pollution, environmentally friendly materials are increasingly favored by people. Polylactic acid (PLA) is a bio-based and biodegradable material, and its synthetic raw materials are derived from plant resources such as corn, which are abundant and renewable. In addition, polylactic acid also has good biocompatibility, processability and mechanical strength, and is an ideal green polymer material. [0003] The rise of new processing technology puts forward new requirements for the performance of polylactic acid. For example, thin-wall injection molding is a processing technology for producing ultra-thin wall thickness parts. It ha...

Claims

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Application Information

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IPC IPC(8): C08G63/08C08G63/78C08L67/04
CPCC08G63/08C08G63/78C08L67/04C08L2205/025
Inventor 马丕明赵子儒徐鹏武杨伟军东为富张洪吉
Owner JIANGNAN UNIV
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