发明名称 |
Carboxylic-acid-terminated hyperbranched poly(benzoxazole) and the star block copolymers therefrom |
摘要 |
Hyperbranched benzazole polymers having repeating units of the formula: wherein Q is -O-, -S- or -NH-, and the terminal groups R are carboxylic acids with their total number equals n+1. A generic method for preparing the polymers is provided. Also provided are the star block copolymers derived from these hyperbranched benzazole polymers and linear poly(ether-ketones) having the following generic formula where x and y are the numbers of repeat units for each poly(ether-ketone) chain; the placement of the carbonyl moieties in the repeat units of the poly(ether-ketone) chains can be either meta or para to the phenoxy groups; the maximal number of poly(ether-ketone) chains is n+1, where n=number of repeat units for hyperbranched polybenzazole). A general method for synthesizing these star block copolymers is provided.
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申请公布号 |
US7582719(B1) |
申请公布日期 |
2009.09.01 |
申请号 |
US20050193990 |
申请日期 |
2005.07.28 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE AIR FORCE |
发明人 |
TAN LOON-SENG;BAEK JONG-BEOM |
分类号 |
C08G63/06;C08G63/12;C08G73/06 |
主分类号 |
C08G63/06 |
代理机构 |
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