摘要
研究了Ｔｉ－Ｍｇ催化剂（ＭＧ型）的乙烯－１－丁烯气相共聚合。常压下聚合动力学曲线为衰减型。催化效率为１０．２～１１．０ｋｇＰＥ＼ｇＴｉ，产物密度ｄ＝０．９０５～０．９２２ｇ＼ｃｍ３。Φ－１００流化床共聚合（１．２ＭＰａ）催化效率为１３７～１７３ｋｇＰＥ＼ｇＴｉ。产物特性粘度［η］、ＭＩ２．１６、ＭＦＲ１０．０＼２．１６分别为１．０９～２．２２、１．０～６．９、７．８～１０．４。共聚物熔点、结晶度、密度随共聚单体１－丁烯含量增加而降低。共聚物分子链中１－丁烯链节摩尔数、支化度随共聚单体丁烯含量增加而增加。共聚物分子链中１－丁烯含量为１７％～３８％（体积）时，共聚物熔点１１７．０～１２１．８℃、结晶度２２．９％～３４．９％、密度０．９１４～０．９３９ｇ＼ｃｍ３、共聚物分子链中丁烯链节摩尔数０．０１３～０．０６８、支化度１４．３～３１．１。
he catalytic efficience is 10.2￣11.0 kg PE g Ti and the kinetic curves are decay under atmospheric pressure. Products with density of 0.905￣0.922 g cm3 had been obtained. The catalytic efficience of the copolymerization in fluide bed (1.2 MPa) reaches to the level of 137￣173 kg PE g Ti. The ,MI2.16 and MFR10.0 2.16 of copolymers are 1.09￣2.22, 1.0￣6.9 and 7.8￣10.4, respectively. The effects of comonomer 1butene on copolymer properties were investigated. It was found that the melting point, crystallinity and density of the copolymers decreased and the 1butene monomer content and branched chain concentration in the copolymers increased with increasing 1butene content in the feeding. When 1butene content in the feeding is 17%￣38%(V), the melting point, crystallinity and density of the copolymers are 117.0￣121.8 ℃, 22.9%￣34.9%, 0.914￣0.939 g cm3 and the branched chain concentration and butene monomer mole in the copolymers are 14.3￣31.1 and 0.013￣0.068, respectively. The results of 13C NMR show that the products are random ethylene1butene copolylmers.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1997年第6期60-66,共7页
Polymer Materials Science & Engineering
关键词
钛
催化剂
乙烯
丁烯
气相共聚合
共聚物
聚合
TiMg catalyst
gasphase copolymerization of ethylene1butene
copolymer property
