Study On Copolymerization Of Ethylene With 1-Decene And Microstructure Of The Copolymer

As an alpha olefin,copolymerization of ethylene and 1-decene forms ethylene/1-decene copolymers with broad potential applications.The copolymers can be used as high-performance polymer materials such as linear low-density polyethylene,polyolefin elastomer,olefin block copolymers and so on.It has a good application prospect in China.The copolymerization of ethylene and 1-decene catalyzed by synthetic restricted geometric metallocene catalysts A?2-?tetramethylcyclopentadienyl?-6-tertbutylphenoxy-titanium dichloride?and B?2-?tetramethylcyclopentadienyl?-4,6-ditertbutylp-henoxy-titanium dichloride?with additives of Al?ⁱBu?₃/[Ph₃C]⁺[B?C₆F₅?₄]^-was studied.The sequence distribution of copolymer microstructures and the probability statistics of chain growth elementary reactions were analyzed.The copolymerization mechanism and the structure of copolymers were discussed.The results show that:?1?the content of copolymer 1-decene in the main chain of copolymer is between 14.3%and 67.2%?mass fraction?;?2?the growth mechanism of copolymer chain conforms to the first-order Markovian model chain growth mechanism;?3?the copolymer structure tends to polyethylene copolymer.1-decene is easier to be coordinated or inserted into{copolymer main chain-1-decene-1-decene-catalyst}sequence,and ethylene is easier to be coordinated or inserted into{copolymer main chain-ethylene-ethylene-catalyst}sequence;?4?with the increase of 1-decene concentration,copolymers?ethylene/1-decene?tend to polydecene structure;?5?1-decene is easier to be inserted into catalyst B.