发明名称 |
Methods for Modulated Degenerative Transfer Living Polymerization and Isotactic-Atactic Stereoblock and Stereogradient Poly(Olefins) Thereby |
摘要 |
Methods for modulated degenerative transfer living polymerization and isotactic-atactic stereoblock and stereogradient poly(olefins) thereby Abstract A method of producing a multiblock, stereoblock polyolefin having substantially uniform microstructure is disclosed. The method includes contacting a Ziegler-Natta pre-catalyst with a co-catalyst and an olefin to polymerize the olefin and form a first stereoblock, adding a methyl donator that changes the stereoregularity of the polymerization, and polymerizing the olefin to form a second stereoblock. The methods of the present invention allow for the production of poly(olefin)s having predictable degrees of incorporation of stereoerrors of a known type. The methods allows for the production of a variety of poly(olefin) microstructures, ranging from stereoblock to stereogradient poly(olefin)s and poly(olefin)s having fully isotactic to fully atactic microstructures.
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申请公布号 |
US2009220786(A1) |
申请公布日期 |
2009.09.03 |
申请号 |
US20060886535 |
申请日期 |
2006.03.17 |
申请人 |
UNIVERSITY OF MARYLAND, COLLEGE PARK |
发明人 |
SITA LAWRENCE R.;HARNEY MATTHEW B.;ZHANG YONGHUI |
分类号 |
B32B1/00;C08F110/06;C08L9/00;C08L23/04;C08L23/10;C08L25/06;C08L27/06;C08L27/12;C08L33/04;C08L33/10;C08L33/20;C08L39/06 |
主分类号 |
B32B1/00 |
代理机构 |
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地址 |
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