• 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 >Mixed radiation field effects from a nuclear reactor on poly(aryl ether ether ketone): A melt viscosity study
【24h】

Mixed radiation field effects from a nuclear reactor on poly(aryl ether ether ketone): A melt viscosity study

机译：核反应堆对聚芳醚醚酮的混合辐射场效应：熔体粘度研究

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

Poly(aryl ether ether ketone) (PEEK) is a high-temperature engineering thermoplastic used in the aerospace industry. To assess its suitability for nuclear industry applications, the effects of mixed field radiation from a nuclear reactor were investigated on two industrial semicrystalline PEEK grades (VICTREX 150P and 450P). Specimens were first processed on an ENGEL55 injection molder and then irradiated in the pool of a SLOWPOKE-2 nuclear research reactor. Specimens were thus exposed to a mixed field of radiation including gamma, electrons, protons, and neutrons, for exposures resulting in doses ranging from 0.15 to 15 MGy. Irradiated samples were characterized by viscosity measurements in the melt, differential scanning calorimetry (DSC), and density measurements. Melt viscosity of irradiated samples proved to be significant in detecting early molecular weight changes in PEEK and helped explain the interaction of competing chain scission and crosslinking reactions at various stages of the radiolysis. All results pointed toward the following transformation of the resin with increased dosage: chain scission of the tie-molecules between the amorphous and crystalline phases, crosslinking in. the amorphous phase, followed by a general degradation of the molecular weight dominated by chain-scission. (C) 2002 Wiley Periodicals, Inc. [References: 23]
机译：聚（芳基醚醚酮）（PEEK）是航空航天工业中使用的高温工程热塑性塑料。为了评估其对核工业应用的适用性，对两种工业半结晶PEEK等级（VICTREX 150P和450P）研究了来自核反应堆的混合场辐射的影响。样品首先在ENGEL55注塑机上进行处理，然后在SLOWPOKE-2核研究反应堆的池中进行辐照。因此，样品被暴露于包括伽马，电子，质子和中子的混合辐射场中，暴露的剂量范围为0.15至15 MGy。通过熔体中的粘度测量，差示扫描量热法（DSC）和密度测量来表征辐照的样品。事实证明，辐照样品的熔体粘度对检测PEEK的早期分子量变化具有重要意义，并有助于解释在裂解的各个阶段竞争的断链和交联反应之间的相互作用。所有结果都表明树脂具有增加的剂量的以下转变：无定形相和结晶相之间的键分子的断链，无定形相中的交联，随后以断链为主的分子量的一般降解。 （C）2002 Wiley Periodicals，Inc. [参考：23]

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