聚四氟乙烯 发表于 2013-7-21 08:20:35

TRANSITION IN THE MELT OF FEP COPOLYMER

TRANSITION IN THE MELT OF FEP COPOLYMER

【作者】 史观一; 乐俊士;

【Author】 SHI Guanyi YUE Junshi (Shanghai Institute of Organic Chemistry, Academia Sinica, Shanghai)

【机构】 Shanghai Institute of Organic Chemistry Academia Sinica Shanghai; Shanghai Institute of Organic Chemistry Academia Sinica Shanghai;

【摘要】 <正> The nature of the transition in molten FEP copolymer was examined in relation to the enthalpy change, mechanical damping and melt viscosity. For a pre-heat-treated FEP copolymer sample a small endothermic peak appeared at 309—312 ℃in DSC trace with enthalpy change 0.03—0.05 cal/g. A peak was also detected in damping versus temperature curve at the same temperature range. The theological property of FEP copolymer melt was similar to that of liquid crystal, but no birefrigence was viewed... 更多还原

【关键词】 科学通报; 史观; 高分子; 通讯;

【参考文献】 说明:反映本文研究工作的背景和依据
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