Polyethylene rubber and processing method thereof

A technology of polyethylene rubber and hyperbranched polyethylene, which is applied in the field of rubber, can solve the problems of high glass transition temperature of polyethylene, limitation of catalyst chain walking ability, and insufficient branching degree of polyethylene, so as to achieve good mechanical properties and improve additional Value, the effect of expanding the application field

Active Publication Date: 2014-08-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past two decades, the thermal stability of such catalysts has been significantly improved, but the chain walking ability of the catalysts has also been limited, and the degree of branching of polyethylene prepared by these catalysts is not high enough, resulting in the glass transition temperature of polyethylene Above –53°C

Method used

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  • Polyethylene rubber and processing method thereof
  • Polyethylene rubber and processing method thereof
  • Polyethylene rubber and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The processing formula of table one embodiment 1

[0030]

[0031] With the degree of branching as 106 branched chains / 1000 carbons (wherein the methyl content is 50.6 mol%, the ethyl content is 13.2 mol%, the propyl content is 6.7 mol%, the butyl content is 4.9 mol%, the amyl content 3.7mol%, the branched chain content of carbon number ≥ 6 is 20.8mol%), the glass transition temperature is -65°C, the weight average molecular weight is 250,000, and the Mooney viscosity ML(1+4) is 16.75 at 125°C. Polyethylene (HBPE-1) is the main raw material, and the components of the processing formula and the parts by weight of each component are as shown in Table 1.

[0032] The processing steps are as follows:

[0033] Step (1) Set the initial temperature of the internal mixer to 40°C, set the rotor speed to 50 rpm, and keep the temperature for 10 minutes after the temperature stabilizes.

[0034] Step (2) After adding 100 parts by weight of polyethylene and masticating for 1.5 ...

Embodiment 2

[0039] Change the stretching speed of step (5) in embodiment 1 to 500 mm / min, and other conditions are constant.

Embodiment 3

[0041] Change the vulcanization temperature of step (4) in Example 2 to 170° C., change the vulcanization time to 15 minutes, and keep other conditions constant.

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Abstract

The invention belongs to the technical field of rubber, and particularly relates to polyethylene rubber and a processing method thereof. The polyethylene rubber comprises following raw materials by weight: 100 parts of hyper branched polyethylene, 50-80 parts of carbon black, 2-5 parts of a peroxide crosslinking agent, 0-6 parts of zinc oxide, 0-5 parts of a lubricant, 0.3-0.5 part of an accelerant, and 0-0.2 part of sulfur. Beneficial effects of the polyethylene rubber and the processing method thereof are that: the hyper branched polyethylene (HBPE) is sulfurized by utilization of a peroxide sulfurization system, has good mechanical performances through stress-strain performance tests, and has a characteristic of high elasticity of rubber. The processing method of the polyethylene rubber is totally different from preparation methods of chlorinated polyethylene rubber and chlorosulfonated polyethylene rubber at present. The polyethylene rubber and the processing method thereof break the limit that polyethylene can be only used for making plastic products, expand the application scope of the polyethylene, and largely increase the additional value of polyethylene homopolymers.

Description

technical field [0001] The invention belongs to the technical field of rubber, and in particular relates to a polyethylene rubber and a processing method thereof. Background technique [0002] Synthetic rubber is undoubtedly the earliest synthetic polymer developed. Among all synthetic polymers, synthetic rubber is the only material with high elasticity, and is widely used in industries such as automobiles, construction, machinery, electric power, information, aviation, pharmaceuticals, health and daily necessities. At present, the preparation of synthetic rubber usually requires diolefins (such as butadiene, isoprene or ethylidene norbornene) or special monomers (such as diisocyanate or dimethyldichlorosilane). The higher prices of these raw materials lead to high prices of synthetic rubber. [0003] Ethylene is the simplest and cheapest monomer. With the development and utilization of shale gas, the source of ethylene will become more abundant and the price will become ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K13/02C08K3/04C08K5/14C08K3/22C08K3/06B29C35/02
CPCB29C35/02C08J3/242C08J2323/06C08K3/04C08K3/06C08K3/22C08K5/09C08K5/14C08K5/20C08K5/34924C08K5/47C08K13/02C08K2003/2296C08K2201/014C08L23/06C08L2205/025C08L2207/068C08L91/06
Inventor 傅智盛臧丹丹范志强李杰威
Owner ZHEJIANG UNIV
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