摘要
本文用ＤＳＣ研究了乙丙共聚物接枝甲基丙烯酸环氧丙酯（ＥＰ－ｇ－ＧＭＡ）的热学性质。与空白乙丙共聚物相比，接枝共聚物中丙烯序列的结晶温度升高了８～１２℃，熔融热焓增加了４～６Ｊ／ｇ。乙烯序列的结晶温度却稍有下降，其相应熔点及熔融热熔都有相应下降。等温与非等温结晶动力学表明接枝样品中丙烯序列的结晶速率高于相应的未接枝样品，ＥＰ－ｇ－ＧＭＡ的Ａｖｒａｍｉ指数及Ｚｉａｂｉｃｋｉ指数均高于空白ＥＰ，接枝到乙丙共聚物乙烯序列上的甲基丙烯酸环氧雨酯（ＧＭＡ）可能成为丙烯序列结晶的成核剂，加速了丙烯的成核速度和晶体增长速度。
The thermal behaviour of ethylene-propylene copolymer-grafted-glycidy, methacrylate (Ep-g-GMA) were investigated by using DSC.Comparing with plain ethylene-propylene copolymer (EP),crystallization temperature of the propylene squences in the grafted EP copolymer increased about 8-12℃, melting enthalpy increased about 4-6J/g.The isothermal and nonisothermal crystallization kinetics of the grafted and ungrafted samples was carried out by DSC.Within the scope of the researched crystallization temperature the avrami exponent (n) of ungrafted sample was 1.6￣1.8,and that of grafted samples were all above 2,which indicated that the grafted GMA could become a nucleatiag agent for the crystallization of propylene sequences.With increasing of grafted monomer content,crystallization rate of propylene sequence in grafted EP increased,it might be the results of lapid nucleation rate and crystal growth rate.
出处
《中国塑料》
CAS
CSCD
1996年第4期26-30,共5页
China Plastics
