Structure of P(VDF‐TrFE) (80/20) copolymers under electron irradiation and recrystallization
Structure of P(VDF‐TrFE) (80/20) copolymers under electron irradiation and recrystallization
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DOI：
10.1002/app.24776
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发表时间：
2006-12
影响因子：
3
通讯作者：
Weiping Li;Liming Jiang;Yuejin Zhu;Jun Wang
中科院分区：
文献类型：
--
作者：
Weiping Li;Liming Jiang;Yuejin Zhu;Jun Wang
本文用红外光谱、X射线衍射和差示扫描量热法研究了偏氟乙烯-三氟乙烯共聚物[P（VDF-TrFE）]（80/20）经辐照和重结晶后的结构变化。结果表明，重结晶对辐照后的P（VDF-TrFE）共聚物有相反的作用，使辐照后的共聚物部分回复到未辐照时的状态。在重结晶过程中，反式构象逐渐被全反式构象取代，辐照后P（VDF-TrFE）（80/20）共聚物由非极性相转变为极性相。极性相的平均晶粒尺寸大于辐照样品，且随着辐照剂量的增加，再结晶样品与辐照样品的晶粒尺寸差异逐渐减小。由于断裂键的重排，在重结晶-辐照P（VDF-TrFE）（80/20）中也发现了CC和共轭CC键。© 2006 Wiley Periodicals，Inc.应用聚合物科学杂志102：4258-4263，2006
The structural changes of irradiated and recrystallized copolymers of vinylidene fluoride and trifluoroethylene [P(VDF-TrFE)] (80/20) copolymers have been investigated through IR spectra, X-ray, and DSC. It is found that recrystallization has a reverse effect on irradiated P(VDF-TrFE) copolymers, by which the irradiated samples are turned back to original nonirradiated state partially. During recrystallization, trans-gauche sequences are replaced by all-trans conformation gradually and the irradiated P(VDF-TrFE) (80/20) copolymers change from nonpolar phase to polar one. The average crystallite size of polar phase is larger than that in irradiated samples, and the difference between recrystallized and irradiated samples reduces gradually with irradiation dosage. The CC and conjugated CC bonds are also found in the recrystallized-irradiated P(VDF-TrFE) (80/20) due to rearrangement of broken bonds. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 4258–4263, 2006