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Method for preparing starch-based thermoplastic elastomer

A thermoplastic elastomer and starch-based technology, which is applied in the field of preparation of starch-based thermoplastic elastomer, can solve the problems of poor compatibility and reduced mechanical properties, and achieve the effects of promoting uniform mixing, overcoming thermoplastic processing, and wide application prospects

Inactive Publication Date: 2013-02-27
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the study of starch filling application and thermoplastic elastomer POE has not been reported yet.
It is worth mentioning that since starch is hydrophilic, POE is hydrophobic, which makes the compatibility between the two materials very poor, resulting in a decrease in mechanical properties

Method used

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  • Method for preparing starch-based thermoplastic elastomer
  • Method for preparing starch-based thermoplastic elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of POE-g-MAH:

[0023] Mix 980g POE, 20g maleic anhydride and 9g dicumyl peroxide evenly, and melt and extrude them in a twin-screw extruder. °C, 190 °C, 190 °C, 180 °C, the head temperature is 180 °C; the screw speed is 60 r / min, and the feeding speed is 300 r / min. The resulting product was dried under vacuum at 40°C for at least 3 hours.

[0024] 800 g of POE, 200 g of cross-linked starch, and 50 g of POE-g-MAH were uniformly mixed, and plasticized in a twin-screw extruder. The diameter of the screw of the twin-screw extruder is 60mm, and the length-to-diameter ratio is 48:1. The mixing elements are combined and arranged with screw elements with specifications of 36-44 leads, so as to control the residence time of materials in the screw barrel within 5- 10min. The processing temperature is 120°C, 140°C, 140°C, 120°C from the feed inlet to the outlet in sequence, the time is 8 minutes, and the rotation speed is 50 r / min. The final blend mater...

Embodiment 2

[0026] The preparation of POE-g-MAH was as in Example 1.

[0027] 750 g of POE, 250 g of cross-linked starch, and 60 g of POE-g-MAH were uniformly mixed, and plasticized in a twin-screw extruder. The diameter of the screw of the twin-screw extruder is 60mm, and the length-to-diameter ratio is 48:1. The mixing elements are combined and arranged with screw elements with specifications of 36-44 leads, so as to control the residence time of materials in the screw barrel within 5- 10min. The processing temperature is 120°C, 140°C, 140°C, 120°C from the feed inlet to the outlet in sequence, the time is 8 minutes, and the rotation speed is 50 r / min. The final blend material will be obtained.

Embodiment 3

[0029] The preparation of POE-g-MAH was as in Example 1.

[0030] 700 g of POE, 300 g of cross-linked starch, and 50 g of POE-g-MAH were uniformly mixed, and plasticized in a twin-screw extruder. The diameter of the screw of the twin-screw extruder is 60mm, and the length-to-diameter ratio is 48:1. The mixing elements are combined and arranged with screw elements with specifications of 36-44 leads, so as to control the residence time of materials in the screw barrel within 5- 10min. The processing temperature is 120°C, 140°C, 140°C, 120°C from the feed inlet to the outlet in sequence, the time is 8 minutes, and the rotation speed is 50 r / min. The final blend material will be obtained. .

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Abstract

The invention relates to a method for preparing a starch-based thermoplastic elastomer, which belongs to the field of the polymer composite and comprises the following steps: synthesizing macromolecular compatibilizer with good fluidity after melting and extruding a thermoplastic elastomer which is a POE (polyolefin elastomer), maleic anhydride and an initiator in a twin-screw extruder, adding the macromolecular compatibilizer to a POE-starch system, completely melting, blending and extruding by using a twin-screw extruder with a large length-diameter ratio to obtain the starch-based thermoplastic elastomer. The method not only solves the problem of starch carbonization caused by the high temperature in the traditional process, but also has wide application prospect due to the good compatibility of the blend prepared by using the method.

Description

technical field [0001] The invention relates to a preparation method of a starch-based thermoplastic elastomer, which belongs to the field of polymer composite materials. Background technique [0002] Polyolefin Elastomer (POE Polyolefin Elastomer) is a saturated ethylene-octene copolymer. It is produced by the DuPont DOW company of the United States through the in-situ polymerization technology of ethylene and octene. As a thermoplastic elastomer, POE not only has excellent elasticity, low temperature resistance, and tearing properties of rubber products, but also has excellent processing properties, thermoplasticity, and recyclability of plastic products. Due to these good comprehensive physical and chemical properties In recent years, thermoplastic elastomer products have been widely used in many fields such as automobiles, wires and cables, sporting goods, building materials, electronic devices, leather, seals, electric tools, IT industry, toys, etc. However, as oil pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L3/04C08L51/06C08F255/02B29C47/92B29C48/92
CPCB29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895B29C2948/92904
Inventor 陈旭东杨金
Owner SUN YAT SEN UNIV