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Preparation method of long-chain branch PDMS-g-PE (Polydimethylsiloxane-g-Polyethylene) copolymer

A technology of copolymer and long branched chain is applied in the field of preparation of long-chain branched PDMS-g-PE copolymer, which can solve the problem of no polyethylene macromonomer, achieve low glass transition temperature, reduced elastic modulus, The effect of improving elongation at break

Inactive Publication Date: 2018-03-02
SHAANXI JUJIEHAN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such PDMS- g -PE is rarely reported in the literature
The reason is mainly that there is no suitable polyethylene macromonomer that can undergo grafting reaction with polysiloxane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A long-chain branched PDMS- g -The preparation method of PE copolymer, comprises the following steps:

[0019] (1) Take the following raw materials for use: Octamethylcyclotetrasiloxane, Xin’an Chemical Group Co., Ltd.; high hydrogen-containing silicone oil, Jiaxing United Chemical Co., Ltd.; hexamethyldisiloxane, Bailingwei Technology Co., Ltd.; acid clay, Zhejiang Zhongxin Activated Clay Co., Ltd.; zirconium dichloride compound; ethylene, Yangzi Petrochemical Company, purified by ethylene purification box before use; Karstedt catalyst, Shanghai Aladdin Biochemical Technology Co., Ltd.; high-density polyethylene, S5000 type, China Petrochemical Co., Ltd.; all other chemical reagents were of analytical grade, purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0020] (2) Add octamethylcyclotetrasiloxane, high hydrogen-containing silicone oil and end-capping agent hexamethyldisiloxane into a 250ml three-necked flask, which is equipped with a nitrogen inlet, a tetrafl...

Embodiment 2

[0029] A long-chain branched PDMS- g -The preparation method of PE copolymer, comprises the following steps:

[0030] (1) Take the following raw materials for use: Octamethylcyclotetrasiloxane, Xin’an Chemical Group Co., Ltd.; high hydrogen-containing silicone oil, Jiaxing United Chemical Co., Ltd.; hexamethyldisiloxane, Bailingwei Technology Co., Ltd.; acid clay, Zhejiang Zhongxin Activated Clay Co., Ltd.; zirconium dichloride compound; ethylene, Yangzi Petrochemical Company, purified by ethylene purification box before use; Karstedt catalyst, Shanghai Aladdin Biochemical Technology Co., Ltd.; high-density polyethylene, S5000 type, China Petrochemical Co., Ltd.; all other chemical reagents were of analytical grade, purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0031] (2) Add octamethylcyclotetrasiloxane, high hydrogen-containing silicone oil and end-capping agent hexamethyldisiloxane into a 250ml three-necked flask, which is equipped with a nitrogen inlet, a tetrafl...

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Abstract

The preparation method of a long-chain branched PDMS-g-PE copolymer of the present invention comprises the following steps: taking the following raw materials for later use: octamethylcyclotetrasiloxane, Xin'an Chemical Group Co., Ltd.; high hydrogen-containing silicone oil, Jiaxing United Chemical Co., Ltd.; Hexamethyldisiloxane, Bailingwei Technology Co., Ltd.; the long-chain branched PDMS-g-PE copolymer prepared by the method of the present invention has an extremely low glass transition temperature and exhibits excellent molecular Chain flexibility, its fluidity is good, while the tensile strength and elastic modulus are slightly reduced, the elongation at break is significantly increased, and the impact strength is improved. Compared with commonly used polyolefin flow modifiers, it has obvious advantages.

Description

technical field [0001] The invention relates to a long-chain branched PDMS- g - Preparation method of PE copolymer. Background technique [0002] Polydimethylsiloxane (PDMS) is a polymer material with organic-inorganic properties, with Si-O as the main chain and methyl as the side chain. Due to the high bond energy of the Si-O bond, polysiloxane has excellent chemical stability and thermal performance; due to the soft Si-O main chain, the methyl group can shield the main chain, so the glass transition temperature of polysiloxane is extremely low , very low surface tension. However, polysiloxane has poor mechanical properties and poor compatibility with most organic substances, which limit its application range. Polyethylene (PE) has good mechanical properties and comprehensive properties, and is the most widely used general-purpose plastic. However, its wear resistance and environmental stress cracking resistance are not good, and the processing fluidity of some grades i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C08G77/442
CPCC08G81/024C08G77/442
Inventor 李长英
Owner SHAANXI JUJIEHAN CHEM CO LTD
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