|
11. |
A Thermal Decomposition and Glass Transition Temperature Study of Poly(p-bromostyrene) |
|
Journal of Macromolecular Science: Part A - Chemistry,
Volume 15,
Issue 8,
1981,
Page 1577-1599
S.L. Malhotra,
P. Lessard,
L.P. Blanchard,
Preview
|
PDF (765KB)
|
|
摘要:
The thermal decomposition and the glass transition temperature of poly(p-bromostyrene) (PpBrS) were studied with a (DSC-2) differential scanning calorimeter. The undecomposed and decomposed polymers were analyzed by gel permeation chromatography for molecular weight distributions and by DSC-2 for changes in the glass transition temperatures. The decomposition of PpBrS under isothermal conditions during 50 min intervals at increasing temperatures or at a fixed temperature (320°C) for increasing periods results in increasing quantities of high molecular weight polymer yielding greater amounts of low molecular weight products. Random scissions have been shown to break the polymer chains which then volatilize via depolymerization. Activation energy for the decomposition of PpBrS at 118 kcal/mol is near that (102 kcal/mol) of polystyrene (PS). Variation of Tge(at q = 1 K/min) withMobeys the relation
ISSN:0022-233X
DOI:10.1080/00222338108056804
出版商:Taylor & Francis Group
年代:1981
数据来源: Taylor
|
12. |
Erratum |
|
Journal of Macromolecular Science: Part A - Chemistry,
Volume 15,
Issue 8,
1981,
Page 1601-1601
Preview
|
PDF (26KB)
|
|
ISSN:0022-233X
DOI:10.1080/00222338108056805
出版商:Taylor & Francis Group
年代:1981
数据来源: Taylor
|
13. |
Editorial board page for “Journal of Macromolecular Science—Chemistry”, Volume 15, Number 8 |
|
Journal of Macromolecular Science: Part A - Chemistry,
Volume 15,
Issue 8,
1981,
Page -
Preview
|
PDF (46KB)
|
|
摘要:
This is a scanned image of the original Editorial Board page(s) for this issue.
ISSN:0022-233X
DOI:10.1080/00222338108056793
出版商:Taylor & Francis Group
年代:1981
数据来源: Taylor
|
|