Affiliation:
1. SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd. No. 14 Beisanhuan Donglu, Chao Yang District Beijing 10013 China
Abstract
AbstractBoth cyclic olefin copolymer (COC) and functionalized polyolefins are high‐performance polyolefin materials with different outstanding properties. The introduction of functional groups into COC has the potential to yield materials that combine the advantages of both. In this work, ethylene copolymers with norbornene (NBE) or 5‐norbornene‐2‐methanol (NBMO) are synthesized by using a metallocene catalyst. The activity and the molecular weight of copolymer of the former is much higher than that of the latter. A joint deactivation‐chain transfer mechanism is proposed to interpret these observations. Chain transfer is further discussed. Through regression analysis, it is considered that the chain transfer mode of the two comonomers is the same. Three methods for the calculation of NBMO incorporation are proposed and compared, and a more suitable method is obtained, on the basis of the resonance assignment. The comparison of the copolymerization of ethylene with NBE and NBMO may indicate that NBMO has a higher coordination probability but a slower insertion rate compared to NBE.
Funder
National Natural Science Foundation of China
Subject
Materials Chemistry,Organic Chemistry,Polymers and Plastics,Physical and Theoretical Chemistry,Condensed Matter Physics