EPTの結晶性
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概要
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Commercially available ethylene-propylene terpolymers have been studied using the polarizing microscope, differential scanning calorimeter and spectrometer.Some of them contained a little amount of microcrystallites stemming from a comparatively long methylene sequence in their main chain. The melting points of such microcrystallites were observed to be between 40° and 50°C.As the influences of crystallinity on the physical properties of the polymers, higher glass transition point and shorter repetition life at high extension were observed.
- 日本ゴム協会の論文