摘要
采用中红外(MIR)光谱开展聚偏二氟乙烯(PVDF)分子的晶型结构研究。开展了PVDF分子变温中红外(TD-MIR)光谱研究。采用二维中红外(2D-MIR)光谱,进一步开展了PVDF分子晶型互变机理研究。实验发现:PVDF分子晶型结构主要包括:α晶型、β晶型及γ晶型。随着测定温度的升高,PVDF分子α晶型、β晶型及γ晶型对应的红外吸收频率及强度均有明显的改变。在303~433 K、433~453 K和453~523 K这三个温度区间,PVDF分子晶型结构对热敏感程度及变化顺序都存在着较大的差异性,并进一步进行了晶型结构互变机理的研究。本项研究拓展了三级MIR光谱在重要的有机氟高分子材料(PVDF)晶型结构的研究范围。
The polyvinylidene difluoride(PVDF)molecular crystal structure was studied by middle infrared(MIR)spectroscopy.Temperature-dependent middle infrared(TD-MIR)spectroscopy of PVDF was studied also.Mechanism of crystal structure interchange of PVDF molecular was considered by the two dimensional middle infrared(2D-MIR)spectroscopy also.The crystal structure of PVDF molecular includedαcrystal structure,βcrystal structure andγcrystal structure.With the increase of the temperature,the corresponding frequency and absorption intensity of PVDF molecular crystal structure are changed obviously.In the(303~433 K),(433~453 K)and(453~523 K)temperature range,crystal structure of PVDF molecular showed different sensitivity and order to the heat,and the crystal structure interchange mechanism was studied furthermore.The paper demonstrated the key roles of three-step MIR spectroscopy in the analysis of crystal structure of the important organic fluorine polymer materials(PVDF).
作者
王倩
李萌萌
戎媛
王晓萱
哈婧
常明
于宏伟
WANG Qian;LI Mengmeng;RONG Yuan;WANG Xiaoxuan;HA Jing;CHANG Ming;YU Hongwei(Hebei University of Science&Technology,School of Chemical and Pharmaceutical Engineering,Shijiazhuang 050018,China;Shijiazhuang University College of Chemical Technology,Shijiazhuang 050035,China)
出处
《弹性体》
CAS
北大核心
2021年第6期16-22,共7页
China Elastomerics
基金
河北省高等学校科学技术研究项目(ZC2021250)
河北省麻醉药技术创新中心自研项目(SG2019010)
石家庄市麻醉药技术创新中心自研项目(2019)。
