A hydrogenated polymer obtained by hydrogenating a conjugated diene polymer having an average vinyl bond content of 20% by weight or more and less than 40% by weight to a degree such that 85% or more of double bond residues in the conjugated diene unit portion are hydrogenated, wherein
(1) the crystallizing peak temperature and the hydrogenated vinyl bond content satisfy the formula:
−2.8
V
+100<
T
<−2.8
V
+130
wherein T is the crystallizing peak temperature (° C.) measured by DSC; and V is the hydrogenated vinyl bond content (%),
(2) the molecular weight is 60,000 to 600,000, and
(3) the molecular weight distribution is 1.55 to 5.0. The hydrogenated polymer is excellent in mechanical strength, heat resistance, weatherability and processability and, when blended with other thermoplastic resins or rubbery polymers, provides molded articles with well-balanced physical properties such as impact resistance and moldability.
一种氢化聚合物,通过氢化
乙烯基键平均含量大于或等于 20%(重量比)且小于 40%(重量比)的共轭二烯聚合物,使共轭二烯单元部分中 85%或更多的双键残基氢化而得到,其中
(1) 结晶峰值温度和氢化
乙烯基键含量满足以下公式:
-2.8
V
+100<
T
<-2.8
V
加;130
其中,T 为 DSC 测得的结晶峰温度(℃);V 为氢化乙烯基键含量(%)、
(2) 分子量为 60,000 至 600,000,且
(3) 分子量分布为 1.55 至 5.0。氢化聚合物具有优异的机械强度、耐热性、耐候性和可加工性,当与其他热塑性
树脂或橡胶聚合物混合时,可提供具有良好平衡物理性能(如抗冲击性和可模塑性)的模塑制品。