Linear functional copolymers of ethylene with precise and minimum run length distributions and methods of making thereof
申请人:ExxonMobil Research and Engineering Company
公开号:US07504465B2
公开(公告)日:2009-03-17
The present invention is related to a linear functional polymer having repeating units A, B and D. Unit A represents —CH2—, unit B represents
and unit D represents
where R1 represents a polar functional group. There are at least four A units separating each B unit, each D unit, and each B and D unit. The value y represents the total number of B units and is an integer greater than or equal to 1. The total number of D units is represented by h and is an integer greater than or equal to 0. And x represents the total number of A units and is an integer sufficient that the molar fraction of the B and D units in the linear functional polymer is represented by a value j defined by the equation:
j
=
y
+
h
x
+
y
+
h
≤
0.032
.
The present invention is also directed to a method for preparing such linear functional polymers by copolymerizing a first polar substituted monomer and a second non-polar unsubstituted monomer.
本发明涉及一种具有重复单元A、B和D的线性功能聚合物。单元A表示-CH2-,单元B表示,单元D表示其中R1表示一个极性功能基团。每个B单元、每个D单元以及每个B和D单元之间至少有四个A单元。值y表示B单元的总数,是大于或等于1的整数。D单元的总数由h表示,是大于或等于0的整数。x表示A单元的总数,是一个足够大的整数,以使线性功能聚合物中B和D单元的摩尔分数由方程式定义的值j表示:j=y+hx+y+h≤0.032。本发明还涉及通过共聚第一极性取代单体和第二非极性未取代单体来制备这种线性功能聚合物的方法。