Method for qualitatively testing molecular weight distribution of ultrahigh molecular weight polyethylene (UHMWPE)

A technology of ultra-high molecular weight and molecular weight distribution, which is applied in the testing field of qualitative comparison and judgment of molecular weight distribution of ultra-high molecular weight polyethylene, can solve problems such as difficulty in obtaining molecular weight distribution curves accurately, small amount of molecular weight substances, and large test errors, etc., to achieve Good adaptability, low cost and good repeatability
CN102353618AActive Publication Date: 2012-02-15SHANGHAI RES INST OF CHEM IND +1
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
SHANGHAI RES INST OF CHEM IND
Publication Date
2012-02-15

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Abstract

The invention relates to a method for qualitatively testing the molecular weight distribution of ultrahigh molecular weight polyethylene (UHMWPE). In the method, a set of method for comparing and judging the molecular weight distribution of the UHMWPE by combining the limiting viscosity number with kinetic viscosity of a raw material and testing kinetic viscosity by using a rotary viscometer according to the relation between the solubility and molecular weight dependence of the UHMWPE is designed. Compared with the prior art, the method is convenient and easy to operate, and is suitable for qualitatively judging the molecular weight distribution of a contrast sample.
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Description

Technical field

[0001] The invention relates to a testing method for the physical properties of ultra-high molecular weight polyethylene, in particular to a testing method for qualitatively comparing and judging the molecular weight distribution of ultra-high molecular weight polyethylene. Background technique

[0002] Ultra-high molecular weight polyethylene (UHMWPE) refers to a linear structure polyethylene with a viscosity average molecular weight above 1.5 million. Because of its long molecular chain and extremely high molecular weight, it has some excellent qualities that other resins do not have, such as impact resistance, abrasion resistance, self-lubrication, chemical resistance, and low temperature resistance. At present, UHMWPE's main products include: fibers, plates, pipes, bars and finished products (including gears, bearings, bushings, rollers, guide rails, sliders, pads and various products, etc.), which are widely used in textiles, papermaking, food , Chemical, pa...

Claims

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