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Polylactic acid/polycaprolactone-based elastomer blend and preparation method thereof

A technology of polycaprolactone and polylactic acid, which is applied in the field of polylactic acid/polycaprolactone-based elastomer blends and its preparation, can solve the problems of non-biodegradability and environmental pollution

Pending Publication Date: 2019-11-26
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sources of traditional shape-memory polymer materials are mainly petroleum-based materials, such as polynorbornene, polyurethane, high-trans polyisoprene, and styrene and butadiene copolymers. , waste is not biodegradable, but also brings environmental pollution

Method used

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  • Polylactic acid/polycaprolactone-based elastomer blend and preparation method thereof
  • Polylactic acid/polycaprolactone-based elastomer blend and preparation method thereof
  • Polylactic acid/polycaprolactone-based elastomer blend and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. This embodiment provides a polylactic acid / polycaprolactone-based elastomer blend in parts by weight, comprising the following components: 100 parts of polylactic acid, 10 parts of polycaprolactone three with a molecular weight of 2000g / mol alcohol, and 3 parts of hexamethylene diisocyanate.

[0026] 2. The preparation method of the polylactic acid / polycaprolactone-based elastomer blend comprises the steps:

[0027] Step 1. Premix 100 parts of polylactic acid and 10 parts of polycaprolactone triol with a molecular weight of 2000 g / mol in an internal mixer for 5 minutes, and the blending temperature is 180° C.

[0028] Step 2. Add hexamethylene diisocyanate to the blending system. The molar ratio of hexamethylene diisocyanate to the isocyanate group of the hydroxyl group of polycaprolactone triol is 1:1.15, and continue at 180°C After reacting for 8 minutes, the polylactic acid / polycaprolactone-based elastomer blend was obtained.

[0029] 3. Properties of polylactic...

Embodiment 2

[0033] 1. This embodiment provides a polylactic acid / polycaprolactone-based elastomer blend in parts by weight, which includes the following components: 100 parts of polylactic acid, 20 parts of polycaprolactone with a molecular weight of 4000g / mol Alcohol, 5 parts polyphenyl polymethylene polyisocyanate.

[0034] 2. The preparation method of the polylactic acid / polycaprolactone-based elastomer blend comprises the steps:

[0035] Step 1. Premix 100 parts of polylactic acid and 20 parts of polycaprolactone diol with a molecular weight of 4000 g / mol in an internal mixer for 5 minutes, and the blending temperature is 190° C.

[0036] Step 2. Add polyphenyl polymethylene polyisocyanate to the blending system. The molar ratio of polyphenyl polymethylene polyisocyanate according to the hydroxyl group and isocyanate group of polycaprolactone diol is 1:1.05 , Continue the reaction at 190° C. for 8 minutes to obtain a polylactic acid / polycaprolactone-based elastomer blend.

[0037] 3...

Embodiment 3

[0041]1. This embodiment provides a polylactic acid / polycaprolactone-based elastomer blend in parts by weight, comprising the following components: 100 parts of polylactic acid, 15 parts of polycaprolactone three with a molecular weight of 6000g / mol Basic acid, 10 parts styrene-glycidyl methacrylate copolymer.

[0042] 2. The preparation method of the polylactic acid / polycaprolactone-based elastomer blend comprises the steps:

[0043] Step 1. Premix 100 parts of polylactic acid and 15 parts of polycaprolactone tribasic acid with a molecular weight of 6000 g / mol in an internal mixer for 4 minutes, and the blending temperature is 200° C.

[0044] Step 2, add styrene-glycidyl methacrylate copolymer to the blend system, the styrene-glycidyl methacrylate copolymer is based on the carboxyl group and epoxy group mole of polycaprolactone tribasic acid The ratio is 1:1.5, and the reaction is continued at 200°C for 10 minutes to obtain a polylactic acid / polycaprolactone-based elastomer...

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Abstract

The invention discloses a polylactic acid / polycaprolactone-based elastomer blend. The blend is prepared from, by weight, 100 parts of polylactic acid, 10-40 parts of a low molecular weight polycaprolactone copolymer and 2-30 parts of a high reactivity substance, and the molecular weight of the low molecular weight polycaprolactone copolymer is 500-20000 g / mol; and the high reactivity substance comprises one or more of diisocyanate, polyisocyanate, a small molecule containing a diepoxy group, an oligomer containing a diepoxy group, a small molecule containing a polyepoxy group and an oligomer containing a polyepoxy group. The polylactic acid / polycaprolactone-based elastomer blend prepared in the invention realizes the high toughness, high strength and excellent shape memory behavior of a polylactic acid-based blend.

Description

technical field [0001] The invention relates to the field of polymer composite material manufacturing, in particular to a polylactic acid / polycaprolactone-based elastomer blend and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) has the advantages of high mechanical strength, high modulus, and good plasticity, and can be used as an ideal substitute for some petroleum-based polymer materials. At present, countries around the world have proposed "plastic restriction orders" or even "plastic ban orders" for petroleum-based polymer materials. It can be foreseen that bio-based polylactic acid has a huge application prospect in various industries. However, pure polylactic acid is hard and brittle, has poor impact resistance, and low elongation at break. These shortcomings are problems that need to be solved urgently in the application process of polylactic acid. [0003] Blending modification can improve the performance of polylactic acid to a ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L75/06
CPCC08L67/04C08L2201/12C08L75/06
Inventor 赵西坡彭少贤寇志敏周为夷陈昊
Owner HUBEI UNIV OF TECH
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