【摘要】 采用正电子湮没寿命谱（ Ｐ Ａ Ｌ Ｓ）研究了在１４０～３５０ Ｋ 温度范围内弹性体乙烯辛烯共聚物（ Ｐ Ｏ Ｅ） 在１４０～３５０ Ｋ 温度范围内的自由体积和结构转变特性，得到 Ｐ Ｏ Ｅ的玻璃化转变温度 Ｔｇ 和次级转变温度 Ｔβ分别为２２０、１７０ Ｋ，并分析了决定其正电子湮没参数和结构转变的化学结构因素更多还原

【Abstract】 Positron annihilation lifetime have been measured for polyethylene\|octene copolymer(POE) in the temperature range from 140K to 350K. The o\|Ps annihilation lifetime data show the structure transition in the coplymer.The transitions at 170K and 220K are attributed to the β transition and glass transition of POE. We also analysis the chemical structure factors which determine the positron annihilation parameters and structure transitions.更多还原