...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polymers for advanced technologies >UV accelerated aging and aging resistance of dihydroxy poly(p-phenylene benzobisoxazole) fibers
【24h】

UV accelerated aging and aging resistance of dihydroxy poly(p-phenylene benzobisoxazole) fibers

机译：紫外线加速了二羟基聚对苯撑苯并二恶唑纤维的老化和抗老化性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

By introducing binary hydroxyl groups into poly(p-phenylene benzoxazole) (PBO) macromolecular chains, we synthesized dihydroxy poly(p-phenylene benzobisoxazole) (DHPBO) polymers and then prepared DHPBO fibers by dry-jet wet-spinning. Comparative studies were performed between intrinsic PBO fibers and DHPBO fibers. The effects of hydroxyl polar groups on improving the UV aging resistance of PBO fibers were investigated. With the introduction of hydroxyl groups, substantial changes in the chemical structures and surface morphologies of DHPBO fibers were observed. As proved by tensile testing and intrinsic viscosity measurement, the UV resistance of DHPBO fibers is obviously improved compared to that of intrinsic PBO fibers. XRD results indicate that the UV aging of these fibers occurs mainly on the surfaces of fibers. Based on these results, the mechanism of UV aging of PBO fibers was discussed.
机译：通过将二元羟基引入聚对苯撑苯并恶唑（PBO）大分子链，我们合成了二羟基聚对苯撑苯并二恶唑（DHPBO）聚合物，然后通过干喷湿纺法制备了DHPBO纤维。在本征PBO纤维和DHPBO纤维之间进行了比较研究。研究了羟基极性基团对提高PBO纤维抗紫外线老化性能的影响。随着羟基的引入，观察到DHPBO纤维的化学结构和表面形态发生了实质性变化。通过拉伸试验和本征粘度测量证明，DHPBO纤维的抗紫外线性比本征PBO纤维明显提高。 XRD结果表明这些纤维的紫外线老化主要发生在纤维表面上。基于这些结果，讨论了PBO纤维的UV老化机理。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号