Method for evaluating ultrahigh molecular weight polyethylene resin using on-line rheometer

The invention relates to a method for evaluating an ultrahigh molecular weight polyethylene resin using an on-line rheometer. The method comprises the steps of analyzing the on-line viscosity of the ultrahigh molecular weight polyethylene resin, then preparing a lithium battery diaphragm by thermally induced phase separation and biaxial stretching or preparing fibers by extract, drying and multistage stretching, and analyzing the properties thereof to obtain a corresponding relationship between the on-line viscosity of the resin and the film formability of the diaphragm or the spinnability ofthe fibers. Thus, the film formability, spinnability, and the like of the ultrahigh molecular weight polyethylene can be judged through the on-line viscosity of the resin. Compared with the prior art,the method has the advantages of simplicity, good effect and the like. 本发明涉及种用在线流变仪评价超高分子量聚乙烯树脂的方法，该方法对超高分子量聚乙烯树脂的在线粘度进行分析，然后通过热致相分离和双向拉伸技术制备得到锂电池隔膜或通过萃取干燥、多级拉伸制备得到纤维，并对其性能进行分析，得到树脂的在线粘度与隔膜的成膜性能、纤维的可纺性能之间的对应关系。因此，可以通过树脂的在线粘度判