Relaxational and vibrational dynamics of poly(propylene glycol)

被引：30

作者：

Bergman, R ^{[1
]}

Svanberg, C ^{[1
]}

Andersson, D ^{[1
]}

Brodin, A ^{[1
]}

Torell, LM ^{[1
]}

机构：

[1] Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1998年 / 235卷

关键词：

D O I：

10.1016/S0022-3093(98)00638-3

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Photon correlation spectroscopy has been used to study structural relaxation dynamics near the glass transition temperature for glass-forming linear chain molecules differing in the number of repeat units. Complementary investigations of the low-frequency vibrational dynamics were performed by means of Raman spectroscopy. The systems studied range from the low molecular weight liquid propylene glycol (PG, molecular weight (MW) = 76) to the polymer, poly(propyleneglycol) (PPG, M-W = 4000). Differences are observed in terms of the fragility of the systems. The findings are attributed to bonding between the hydroxy endgroups which decrease in density as the MW increases. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：225 / 228

页数：4

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