Star-shaped perfluoropolyether type polyamide elastomer and preparation method thereof

The invention discloses a star-shaped perfluoropolyether type polyamide elastomer and a preparation method thereof. The star-shaped perfluoropolyether type polyamide elastomer comprises a star-shaped polymer consisting of a polyamide block and a perfluoropolyether block. The star-shaped perfluoropolyether type polyamide elastomer is prepared by taking triisocyanate as a connecting agent/chain extender and connecting a perfluoropolyether type polyamide elastomer prepolymer prepared from polyether containing perfluoropolyether compounds and polyamide. The star-shaped perfluoropolyether type polyamide elastomer has double advantages of polyamide and perfluoropolyether, and also has higher molecular weight and more excellent mechanical properties. 本发明公开了一种星型全氟聚醚型聚酰胺弹性体及其制备方法，该星型全氟聚醚型聚酰胺弹性体包括由聚酰胺嵌段和全氟聚醚嵌段组成的星型聚合物。本发明以三异氰酸酯为连接剂/扩链剂，连接由含全氟聚醚类化合物的聚醚与聚酰胺制备的全氟聚醚型聚酰胺弹性体预聚体，制备出星型全氟聚醚型聚酰胺弹性体。该星型全氟聚醚型聚酰胺弹性体兼具聚酰胺和全氟聚醚的双重优势的同时，还具有更高的分子量和更优异的力学性能。