• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >EFFECTS OF COMPOSITION OF MODIFIED POLYAMIDE ON BARRIER PROPERTIES OF POLYETHYLENE MODIFIED POLYAMIDE BLENDS
【24h】

EFFECTS OF COMPOSITION OF MODIFIED POLYAMIDE ON BARRIER PROPERTIES OF POLYETHYLENE MODIFIED POLYAMIDE BLENDS

机译：改性聚酰胺的组成对聚乙烯改性聚酰胺混纺物阻隔性能的影响

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

A systematic study on the effects of types and contents of compatibilizer precursors (CPs) on degrees of crystallinity (W-c), melt shear viscosities (eta(s)), and permeation barrier properties of modified polyamides (MPAs) and on their corresponding morphology and barrier properties of bottles blow-molded from polyethylene (PE)/MPA blends is reported. Two alkylcarboxyl-substituted polyolefins were selected as CPs to modify PA and to improve its permeation resistance to xylene by the ''reactive extrusion'' process. The barrier improvements of MPAs prepared in this study depend significantly on the type and content of CP present in the MPA. A maximum improvement in barrier properties of each MPA series samples were found as the contents of CP reached an ''optimum'' value. On the other hand, it is interesting to note that bottles blow-molded from PE/MPA series samples exhibited better barrier properties because the MPAs used were associated with better permeation resistance to xylene. The melt shear viscosities of MPAs were found to depend on the type of CP used and increase with increasing CP contents. In contrast, the W-c of MPAs decreased with increasing CP contents. Further analysis of the fracture surfaces of bottles blow-molded from PE/ MPA blends also indicated that the morphology of MPA laminas depended on the type of CP present in the MPA, and these MPA laminar structures became clearer as the contents of CPs increased. Possible mechanisms accounting for the interesting behaviors described above are discussed. (C) 1997 John Wiley & Sons, Inc. [References: 12]
机译：系统研究增容剂前体（CPs）的类型和含量对改性聚酰胺（MPA）的结晶度（Wc），熔体剪切粘度（eta（s））和渗透阻隔性能及其相应形态和结构的影响报道了由聚乙烯（PE）/ MPA共混物吹塑成型的瓶子的阻隔性能。选择两种烷基羧基取代的聚烯烃作为CP，以通过“反应挤出”工艺改性PA并提高其对二甲苯的渗透性。本研究中制备的MPA的阻隔性改善很大程度上取决于MPA中CP的类型和含量。当CP的含量达到“最佳”值时，发现每个MPA系列样品的阻隔性能都有最大的提高。另一方面，有趣的是注意到用PE / MPA系列样品吹塑成型的瓶子表现出更好的阻隔性能，因为所使用的MPA具有更好的抗二甲苯渗透性。发现MPA的熔体剪切粘度取决于所用CP的类型，并随CP含量的增加而增加。相反，MPA的W-c随着CP含量的增加而降低。对由PE / MPA共混物吹塑成型的瓶子的断裂表面的进一步分析还表明，MPA薄片的形态取决于MPA中存在的CP的类型，并且随着CP含量的增加，这些MPA层状结构变得更加清晰。讨论了解释上述有趣行为的可能机制。 （C）1997 John Wiley＆Sons，Inc. [参考：12]

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