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Fully-biodegradable polylactic acid thermoplastic elastomer and preparing method thereof

A thermoplastic elastomer, polylactic acid technology, applied in the field of polylactic acid thermoplastic elastomer and its preparation, can solve the problems of uneven particle size, environmental pollution, lack of biocompatibility, etc., and achieve good biocompatibility, The effect of simple preparation process and excellent mechanical properties

Inactive Publication Date: 2016-04-06
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the process of preparing polylactic acid thermoplastic elastomers by the above-mentioned dynamic vulcanization method, elastomer materials such as rubber are broken into micron-sized particles under the action of shear force, and the particle size is not uniform; in addition, the degree of vulcanization of elastomer particles is difficult to control, which in turn affects The performance of polylactic acid thermoplastic elastomer
It is worth noting that most of the vulcanizing agents used in the preparation of the above-mentioned thermoplastic elastomers are non-environmentally friendly materials, which do not have biocompatibility and cause a certain degree of pollution to the environment. On the other hand, most of the above-mentioned rubber dispersed phases are non-biodegradable material, resulting in polylactic acid thermoplastic elastomers not being fully biodegradable

Method used

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  • Fully-biodegradable polylactic acid thermoplastic elastomer and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Add 10 parts (parts by mass, the same below) acetyl tri-n-butyl citrate to 100 parts of dried bio-based vulcanized polyester rubber particles for oil extension to obtain oil-extended bio-based vulcanized polyester rubber particles;

[0048] 65 parts of oil-extended bio-based vulcanized polyester rubber particles, 35 parts of poly-L-lactic acid, and 1.3 parts of carbodiimide anti-hydrolysis agent UN-150 were prepared by high-temperature melt blending in an internal mixer to obtain fully biodegradable polylactic acid thermoplastic elastomer.

[0049] The working temperature of the internal mixer is 180° C., and the mixture is mixed at 60 rpm for 10 minutes until the mixing torque is balanced.

Embodiment 2

[0051] Add 12.56g (0.165mol) 1,3-propanediol, 14.87g (0.165mol) 1,4-butanediol and 4.61g (0.039mol) Succinic acid, 31.55 g (0.156 mol) of sebacic acid, and 12.19 g (0.105 mol) of fumaric acid were heated to 180° C. under nitrogen protection and stirring, and esterified for 1 hour to obtain a polyester prepolymer. Add 75.8 mg of p-toluenesulfonic acid and 151.6 mg of p-benzoquinone to the polyester prepolymer obtained above, heat up to 220 ° C, gradually reduce the pressure in the reaction device from 1 atmospheric pressure to 1500 Pa, and react for 2.5 hours. The obtained bio-based aliphatic unsaturated polyester has a number average molecular weight of 4132, a weight average molecular weight of 7478 and a polydispersity coefficient of 1.81. After cooling down to 150°C, add 3.7890g of pentaerythritol tetra(meth)acrylate and 6.0624g of polyethylene glycol 400 monooleate, stir evenly, and after cooling, a paste-like bio-based aliphatic unsaturated polyester mixture is obtained ...

Embodiment 3

[0061] 40 parts of acetyl tri-n-butyl citrate are added to 100 parts of dried bio-based vulcanized polyester rubber particles for oil extension to obtain oil-extended bio-based vulcanized polyester rubber particles;

[0062] 65 parts of oil-extended bio-based vulcanized polyester rubber particles, 35 parts of poly-L-lactic acid, and 1.3 parts of carbodiimide anti-hydrolysis agent UN-150 were prepared by high-temperature melt blending in an internal mixer to obtain fully biodegradable polylactic acid thermoplastic elastomer.

[0063] The working temperature of the internal mixer is 180° C., and the mixture is mixed at 60 rpm for 10 minutes until the mixing torque is balanced.

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Abstract

The invention belongs to the technical field of high-molecular materials and particularly relates to a fully-biodegradable polylactic acid thermoplastic elastomer and a preparing method thereof. The polylactic acid thermoplastic elastomer is prepared from component a biology-base vulcanized lactoprene particles, a component b polylactic acid, a component c softening agent and a component d hydrolysis resisting agent; the weight ratio of the component a to the component b is 50:50-75:25, the content of the component c is 10-40 weight parts calculated according to 100 weight parts of the component a, and the content of the component d is 0.5-3 weight parts and 1-2 weight parts preferably calculated according to the total 100 weight parts of the component a and the component c. The polylactic acid thermoplastic elastomer has a full-biodegradation property, good biocompatibility, an excellent mechanical property and can be used as food packaging materials, child toy materials, medical materials and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a fully biodegradable polylactic acid thermoplastic elastomer and a preparation method thereof. Background technique [0002] Thermoplastic elastomer is a polymer material that has the elasticity of rubber at room temperature and can be melted and reshaped at high temperature. It has a series of advantages such as superior mechanical properties, good processing performance, and recyclable processing. [0003] Polylactic acid is a biodegradable thermoplastic with high strength, modulus, environmental friendliness and biocompatibility. The design and development of polylactic acid thermoplastic elastomers will not only expand the use of polylactic acid in high value-added fields, but also benefit the "green" and sustainable development of the thermoplastic elastomer industry in the long run. Polylactic acid thermoplastic elastomers are mainly divided into two...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08L67/04C08K5/11C08K5/29
CPCC08L67/04C08L67/06C08L2207/04C08L2201/06C08K5/11C08K5/29
Inventor 王庆国刘敬锐宰莹莹杨德敬
Owner QINGDAO UNIV OF SCI & TECH
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