发明名称 |
CONTROLLED DEGRADATION OR CRACKING OF ALPHA-OLEFIN POLYMERS |
摘要 |
An improved process for the controlled reduction of average molecular weight and alteration of molecular weight distribution of C3-C8 alpha-monoolefin homopolymers or copolymers comprises adding a peroxide continuously at a programmed cyclic rate to the polymer or copolymer and heating the mixture in a melt extruder. The rate of peroxide addition is varied at a frequency with a period longer than the decomposition time of the peroxide but shorter than the passage time of the mixture through the extruder, so as to achieve combinations of melt flow and molecular weight distribution for the polymer not possible with prior art steady rates of addition. |
申请公布号 |
KR930005820(B1) |
申请公布日期 |
1993.06.25 |
申请号 |
KR19850009556 |
申请日期 |
1985.12.18 |
申请人 |
SHELL INTERNATIONALE RESEARCH MATSCHAPPIS B.V. |
发明人 |
SOL, DAVISON |
分类号 |
C08F8/00;C08F2/38;C08F8/50;(IPC1-7):C08F8/50;C08F10/00 |
主分类号 |
C08F8/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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