PROPERTIES OF SOME POLYSILANE POLYMERS - (N-PRSIME)(N), (I-PRSIME)(N), AND (SEC-BUSIME)(N)

被引：9

作者：

ASUKE, T ^{[1
]}

WEST, R ^{[1
]}

机构：

[1] UNIV WISCONSIN,DEPT CHEM,MADISON,WI 53706

来源：

JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS | 1995年 / 5卷 / 01期

关键词：

POLYSILANE; NEMATIC MESOPHASE; LIQUID CRYSTAL; ISOTOPIC PHASE; THERMOCHROMIC TRANSITION;

D O I：

10.1007/BF01157521

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Three polysilane polymers, (n-PrSiMe)(n), (i-PrSiMe)(n), and (sec-BuSiMe)(n), were synthesized and characterized by DSC, UV spectroscopy, wide-angle X-ray diffraction, and optical microscopy, all at variable temperatures. The known thermochromic transition of (n-PrSiMe)(n) at similar to 48 degrees C is associated with a change From an orthorhombic to an isotropic phase. (i-PrSiMe)(n) was examined as an insoluble and soluble (low M(w)) fraction, both existing mainly in an orthohombic lattice at room temperature. (sec-BuSiMe)(n) has a mesophase structure at 25 degrees C, undergoes a weak endothermic transition to a second (nematic) mesophase near 65 degrees C, and becomes isotropic at similar to 160 degrees C.

引用

页码：31 / 42

页数：12

共 35 条

[1] ELECTRONIC TRANSPORT IN ALIPHATIC POLYSILYLENES AND POLYGERMYLENES [J].