【摘要】 用示差扫描量热法 ( DSC)、广角 X射线衍射 ( WAXD)和傅里叶红外光谱 ( FTIR)研究了偏氟乙烯 /三氟氯乙烯单体摩尔比为 1∶ 4的无规共聚物的结晶与晶体结构 .结果表明 ,该无规共聚物属于半结晶型聚合物 .在 3 3 3～ 3 5 3 K温度范围内退火 ,片晶逐渐完善、增厚 ,熔点和结晶度均随着退火时间的延长而升高 .于3 5 3 K退火时 ,由 DSC结果计算得到片晶厚度约 4.68nm.在 3 3 3 K退火时得到共聚物的最大结晶度约为1 4% .WAXD测试结果表明 ,沿晶粒 ( 1 0 1 )晶面的面间距为 0 .5 5 nm,垂直于 ( 1 0 1 )衍射晶面方向上的晶粒平均尺寸为 5 .86nm.更多还原

【Abstract】 The crystallization behavior and crystals structures of copoly(vinylidene fluoride-chlorotrifluoroethylene), which was synthesized with n(NDE)∶n(CTFE)=1∶4, were investigated by DSC, WAXD and FTIR, respectively. The experimental data show that the copolymer is one of the semicrystalline polymers. By means of DSC, the thermal analysis of the samples annealed at 313—353 K indicated that their melting temperature and crystallinity increased as the annealing time increased. During the annealing process, the crystals become perfect through segment reorganization. As a result, average lamellar thickness of copolymer annealed at 353 K was estimated about 4.68 nm according to the melting point of the sample. Average crystal dimension normal to(101) was calculated to be 5.86 nm and the interplanar crystal spacing along to(101) was measured to be 0.55 nm by using WAXD. Annealed at 333 K for 720 h, it was revealed that the maximum crystallinity of copolymer was about 14%.更多还原