含萘聚芳醚酮共聚物热处理后产生自由基的ESR谱  

RADICALS GENERATED FROM THERMALLY-TREATED POLY(ARYL-ETHER-KETONE) COPOLYMERS CONTAINING 1,5-NAPHTHALENE MOIETIES STUDIED BY ESR SPECTROSCOPY

作　　者：董凤霞[1] 郑莹光[1] 牛亚明[2] 王贵宾[2] 姜振华[2] 

机构地区：[1]吉林大学分析测试实验中心,吉林长春130023 [2]吉林大学化学学院,吉林长春130023

出　　处：《波谱学杂志》2003年第4期343-348,共6页Chinese Journal of Magnetic Resonance

摘　　要：萘环摩尔含量 2 0 %的聚芳醚酮 (PANEK)无规共聚物在 340℃空气条件下发生交联反应 ,经过不同时间的热处理后 ,在室温检测热处理后产生的自由基ESR谱 .它们都有一条较强的单峰 ,随着热处理时间的增长 ,自由基ESR谱的幅度增强 ,将微波功率加大到 2 0 0mW ,谱线发生明显的变化 ,出现两条重叠在一起的谱线 ,说明含萘环聚芳醚酮在热处理过程中产生了两种不同的自由基 .文中模拟、讨论了热处理过程中产生的两种自由基的归属 ,一种是RO·自由基 ,另一种是萘自由基 ,它们都参与交联反应 。Poly(aryl ether ether ketone)copolymers containing 1,5 Naphthalene moieties have been heated at 340 ℃ in air for different time, and it has been shown that crosslinks are formed under oxidative condition, causing a reduction in the crystallizability of the material. Using ESR spectroscopy, we investigated the radicals generated from P(EEK co 20 mol% ENEK) random copolymers heated at 340 ℃ in air and in nitrogen in this study. The ESR spectra obtained in the process of thermal treatment were originated from two species of free radicals, namely the RO\5free radicals (R\-1) and the naphthalene free radicals (R\-2). Based on the above experimental observations, it can be concluded that both free radical species take part in the crosslinking reaction, but R\-1 plays a more important role.

关 键 词：含萘聚芳醚酮 电子自旋共振谱 热处理 自由基 交联反应 工程塑料 

分 类 号：O482.53[理学—固体物理] TQ324.8[理学—物理]