申请人:Daikin Industries, Ltd.
公开号:EP3708597A1
公开(公告)日:2020-09-16
The invention provides an ethylene/tetrafluoroethylene copolymer having excellent melt-fabricability and excellent heat resistance. The invention relates to an ethylene/tetrafluoroethylene copolymer satisfying the following formula (1). Peak intensities, determined by Fourier transform infrared spectroscopy, of vibrations derived from a -CF2H group, a - CF2CH2COF group, a -COF group, a -COOH group, a dimer of a -CF2COOH group and a monomer of a CF2CH2COOH group, a - COOCH3 group, a -CONH2 group, and a -CH2OH group satisfy the following formula (2). 75≤tanδ60/tanδ5×100≤225 wherein
tanδ(5): a loss tangent after five minutes from start of measurement in dynamic mechanical analysis in an air atmosphere at 320°C; and
tanδ(60): a loss tangent after 60 minutes from the start of measurement in the dynamic mechanical analysis in the air atmosphere at 320°C.
PIA/PIB+PIC+PID+PIE+PIF+PIG+PIH≥0.60 wherein
PIA: the peak intensity of vibration derived from the -CF2H group;
PIB: the peak intensity of vibration derived from the -CF2CH2COF group;
PIC: the peak intensity of vibration derived from the -COF group;
PID: the peak intensity of vibration derived from the -COOH group;
PIE: the peak intensity of vibration derived from the dimer of the -CF2COOH group and the monomer of the CF2CH2COOH group;
PIF: the peak intensity of vibration derived from the -COOCH3 group;
PIG: the peak intensity of vibration derived from the -CONH2 group; and
PIH: the peak intensity of vibration derived from the -CH2OH group.
本发明提供了一种乙烯/四氟乙烯共聚物,它具有极佳的熔融可制造性和优异的耐热性。本发明涉及一种符合下式(1)的乙烯/四氟乙烯共聚物。通过傅立叶变换红外光谱法测定的-CF2H 基团、-CF2CH2COF 基团、-COF 基团、-COOH 基团、-CF2COOH 基团的二聚体和 CF2CH2COOH 基团的单体、-COOCH3 基团、-CONH2 基团和-CH2OH 基团的振动峰强度满足下式 (2)。75≤tanδ60/tanδ5×100≤225 wherein
tanδ(5):在 320°C 的空气环境中进行动态力学分析时,从开始测量起 5 分钟后的损耗正切值;以及
tanδ(60):在 320°C 的空气环境中进行动态机械分析,从开始测量起 60 分钟后的损耗正切。
PIA/PIB+PIC+PID+PIE+PIF+PIG+PIH≥0.60 其中
PIA:来自 -CF2H 基团的振动峰值强度;
PIB:来自 -CF2CH2COF 基团的振动峰强度;
PIC:-COF 基团的振动峰值强度;
PID:-COOH 基团的振动峰值强度;
PIE:-CF2COOH 基团的二聚体和 CF2CH2COOH 基团的单体的振动峰强度;
PIF:来自 -COOCH3 基团的振动峰强度;
PIG:来自 -CONH2 基团的振动峰强度;以及
PIH:-CH2OH 基团的振动峰值强度。