Vinylic polymerization of norbornene by Pd(II)-catalysis in the presence of ethylene

被引：104

作者：

Haselwander, TFA

Heitz, W

Maskos, M

机构：

[1] UNIV MARBURG,FACHBEREICH PHYS CHEM,D-35032 MARBURG,GERMANY

[2] UNIV MAINZ,INST PHYS CHEM,D-55099 MAINZ,GERMANY

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 1997年 / 18卷 / 08期

关键词：

D O I：

10.1002/marc.1997.030180810

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Pd(II) catalysts with nitrilo ligands and BF4- counter ions give the best results in vinylic polymerization of norbornene. Absolute molecular weight determination of polynorbornene (PN) by means of light scattering and the three-dimensional shape of PN were also investigated. By correlation of molecular weights (M) over bar(W) with intrinsic viscosity (Staudinger-index) [eta], yield a close to 0.5 exponent for the Mark-Houwink equation with sol vents chlorobenzene and cyclohexane at 25 degrees C expected for polymer molecules with confined conformation. The vinylic polymerization of norbornene with [(CH3CN)(4)Pd][BF4](2) (I) in nitromethane in the presence of ethylene results in PN with narrow molecular weight distribution. No termination and transfer reactions were found, nor any incorporation of ethylene could be detected.

引用

页码：689 / 697

页数：9

共 27 条

[1]

[Anonymous], COMMUNICATION

[2] HYDROOLIGOMERIZATION OF CYCLOOLEFINS - A VIEW OF THE MICROSTRUCTURE OF POLYNORBORNENE [J].