A kind of method for preparing polyolefin blend

A polyolefin and blend technology, applied in the field of preparing ultra-high molecular weight polyethylene and polyolefin blends, can solve the mechanical properties and mechanical properties limitations of blend materials, phase separation of blend materials, ultra-high molecular weight polyethylene Less problems, to achieve the effect of promoting chain diffusion behavior, uniform mixing, and uniform blending effect
CN109486040BInactive Publication Date: 2021-10-26NINGBO UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO UNIV
Publication Date
2021-10-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for preparing a polyolefin blend, which is characterized in that it comprises the following steps: 1) preparing polyolefin A, the initial storage modulus and platform storage modulus of the polyolefin A at 160°C The ratio is 0.1 to 0.95; 2) preparing polyolefin B, the ratio of the initial storage modulus of the polyolefin B at 160 ° C to the platform storage modulus is 0.1 to 0.8; 3) the above-mentioned The polyolefin A is blended with the polyolefin B to obtain a polyolefin blend C, and the ratio of the initial storage modulus to the plateau storage modulus at 160°C of the polyolefin blend C is 0.1-0.75. Compared with the prior art, the advantage of the present invention is that: the present invention prepares low-entangled polyolefin blends by chemical reaction blending, so that there is no phase separation in the blends, and with the (ultra) high molecular weight polyolefin With the increase of olefin addition, the blend still has a uniform blending effect.
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Description

technical field

[0001] The invention belongs to the technical field of olefin polymerization, and in particular relates to a method for preparing a blend of ultra-high molecular weight polyethylene and polyolefin. Background technique

[0002] Polyolefin blends are the mixing of two or more polyolefins through physical or chemical methods to achieve the purpose of improving the overall performance of the material. Such as bimodal polyethylene, polypropylene / polyethylene, high-density polyethylene / ultra-high molecular weight polyethylene, linear low-density polyethylene / ultra-high molecular weight polyethylene and other blends. Taking the mixture of two polyethylenes as an example, high-molecular-weight polyethylene has excellent mechanical properties, but poor processing performance; low-molecular-weight polyethylene has excellent processing properties and can be used as a plasticizer when blended with high-molecular-weight polyethylene. Significantly improves the processab...

Claims

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