Pseudorotation in pentacoordinated phosphorus compounds. The influence of the conformational transmission effect on the barriers to pseudorotation in cyclic alkoxyphosphoranes
作者:A. E. H. De Keijzer、L. H. Koole、Hendrick M. Buck
DOI:10.1021/ja00226a012
日期:1988.8
oxyphosphoranes I (R1 = H, Me; R2 = Me, Ph; R3 = Me, OEt; R4 = Me, cyclopentylmethyl, etc.) is used to examine the influence of the conformational transmission effect on the barriers to pseudorotation in pentacoordinated P compds. The pseudorotation rates of monocyclic oxyphosphoranes exhibiting the conformational transmission effect is 2-4 times faster as compared to their counterparts in which the effect is
Voltage stabilized polyolefin compositions and silicone-glycol derivatives suitable therefor
申请人:CIBA-GEIGY AG
公开号:EP0252878A1
公开(公告)日:1988-01-13
Esters and urethanes of certain polydialkylsiloxanepolyoxyalkylene block and graft copolymers of the formulae given in claim I which impart high voltage stabilization to dielectric olefin polymers, the stabilized olefin polymer insulating materials resulting therefrom and electric wire or cable insulated therewith.
权利要求 I 所述某些聚二烷基硅氧烷聚氧亚烷基嵌段共聚物和接枝共聚物的酯和氨基甲酸乙酯,可为电介质烯烃聚合物、由此产生的稳定烯烃聚合物绝缘材料以及用其绝缘的电线或电缆提供高压稳定性。
Stabilized olefin polymer insulating compositions
申请人:CIBA-GEIGY AG
公开号:EP0253766A2
公开(公告)日:1988-01-20
Insulating material for electric wire and cable which consists of an olefin polymer stabilized against electrical failure resulting from voltage stress by the presence therein of a polydialkylsiloxanepolyoxyalkylene block or graft copolymer, the electric wire coated with said insulating material and a method for stabilizing said insulation.