PTFE的辐射裂解、交联及其应用

PTFE

摘　要:聚四氟乙烯（PTFE）是一种性能优异的工程塑料，通常被认为是典型的辐射裂解材料。PTFE可以在不同条件下实现裂解并生成PTFE微粉。在高于PTFE的熔点即温度为330～340℃，真空或惰性气氛下进行辐照，可实现PTFE的交联。本工作综述了PTFE辐射裂解和交联研究的历史和最新进展，并对交联PTFE在润滑材料、燃料电池、光刻等领域的应用进行了介绍。
关键词:高温辐照 聚四氟乙烯 辐射交联 辐射裂解

Radiation degradation and crosslinking of polytetrafluoroethylene and its applicationWU Guozhong, TANG Zhongfeng, WANG Mouhua 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; 2Graduate University of the Chinese Academy of Sciences, Beijing 100049, ChinaAbstractolytetrafluoroethylene （PTFE） is a high-performance engineering plastic and known as a typical material of radiation degradation. PTFE can be degraded by radiation under various conditions and PTFE micro-powder is usually fabricated by a combination of radiation and milling. PTFE can also be crosslinked by irradiation in the melt state （330-340 ℃）. The materials can be applied as a special additive due to its excellent wear resistance. Crosslinked PTFE may also be applied in lithography and fuel cell membrane in the future. In this paper, history and application of PTFE degradation and crosslinking products are reviewed.
Key words:High temperature irradiation, Polytetrafluoroethylene, Radiation crosslinking，Radiation degradation.