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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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高相对分子质量pbo的聚合及其高性能纤维的成型
Abstract:
？以自行合成的4,6-二氨基间苯二酚盐酸盐(dar)和商品对苯二甲酸(tpa)为单体原料,以多聚磷酸(ppa)为溶剂,制备了高相对分子质量pbo聚合物.研究了pbo聚合过程中tpa单体的粒径、溶剂的浓度以及搅拌器、聚合前脱除hcl的方式对pbo聚合和所得产物分子质量的影响.结果表明,tpa粒径小、聚合结束时ppa中p2o5的浓度维持在84%左右,有利于得到高相对分子质量的pbo聚合物.新型双螺带搅拌器能提高搅拌的效果,加压脱除hcl的工艺能有效地实施聚合的稳定控制,利用双螺杆挤出机同时完成了后聚合和液晶纺丝,得到了特性粘度([η])达到20～30dl/g的pbo聚合物,采用干喷湿法成型制备出的金黄色的pbo纤维手感柔软、拉伸强度达到4.38gpa.
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