摘要
利用傅立叶变换红外光谱(FT-IR)研究聚偏氟乙烯与聚三氟乙烯共聚薄膜[P(VDF0.80-TrFE0.20)]的电子辐照和再结晶处理过程中分子链构型变化和化学变化,为深入探讨辐照的改性机理提供依据.研究发现,辐照后薄膜分子链全反构型百分含量随吸收剂量增大而迅速减少,TG构型和T3G构型百分含量显著增多.而当吸收达一定剂量时,三种构型相对含量基本不再变化,表明高剂量辐照时样品极性回升不依赖分子链构型中全反型的含量的增多,而是和高交联度的边界效应有关.再结晶过程中分子链构型变化恰好和辐照效应产生的变化相反,并且形成了更加稳定的C"C共轭结构.
The changes of poly（vinylidene fluoride-trifluoroethylene） [P（VDF-TrFE）] copolymer induced by irradiation and recrystallizafion have been studied using FT-IR spectrometry, which help to make clear the irradiation modification mechanism. It is found that the fraction of TTTT conformation drops rapidly with absorbed doses, while both TG and T3G conformations increase. The content of every conformation is a fixed value above a proper absorbed dose implying that the reincrease of polarity in copolymer at high dose is independent of the content increase of all trans TTTT conformation. It might be related to boundary effect of highly cross-linking. On the other hand, the conformafional changes in recrystallizafion treatment are just contrary to those in irradiation effect, and the copolymers are in a more stable state due to the conjugate C=C bonds.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2006年第8期999-1003,共5页
Acta Physico-Chimica Sinica
基金
浙江省自然科学基金(M103015)
浙江省教育厅科研项目(20051771
20051769)
宁波大学科研基金(200543
XK200558)资助项目
