Application of the Low Frequency Raman Spectroscopy for Studying Ultra-High Molecular Weight Polyethylenes

被引：9

作者：

Pakhomov, Pavel ^{[1
]}

Khizhnyak, Svetlana ^{[1
]}

Galitsyn, Vladimir ^{[2
]}

Rogova, Ekaterina ^{[2
]}

Hartmann, Brigitta ^{[3
]}

Tshmel, Alexandre ^{[4
]}

机构：

[1] Tver State Univ, Phys Chem Dept, Sadovy Per 35, Tver 170002, Russia

[2] Inst Synthet Fiber, Tver 170032, Russia

[3] Univ Osnabruck, Dept Phys Chem, D-49069 Osnabruck, Germany

[4] Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia

来源：

POLYMER SPECTROSCOPY | 2011年 / 305卷

关键词：

gels; low-frequency raman spectroscopy; oriented fibers; reactor powders; ultra-high molecular weight polyethylene; NASCENT REACTOR POWDERS; GEL; FIBERS; MORPHOLOGY;

D O I：

10.1002/masy.201000137

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In the frequency range below similar to 150 cm(-1), the longitudinal acoustic modes (LAM) localized along straight chain segments (SCS) of macromolecules emerge in the Raman spectra of linear semicrystalline polymers. The LAM frequency is inversely proportional to the SCS length; therefore, the LAM band contour reflects the SCS length distribution in a sample. The opportunities given one by the low-frequency Raman spectroscopy for studying the ordered structures in polyethylene are demonstrated and discussed. The illustrating material consists of both previously published and original data on nucleation and transformation of the ensemble of SCS in powder-like, gelled, and drawn ultra-high molecular weight polyethylene.

引用

页数：10

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