INVESTIGATION OF THE TRANSITIONS OF OLIGO-POLYSULFONES BY DSC*

DONG Lisong; ZHENG Guodong; FENG Zhiliu

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INVESTIGATION OF THE TRANSITIONS OF OLIGO-POLYSULFONES BY DSC*

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- INVESTIGATION OF THE TRANSITIONS OF OLIGO-POLYSULFONES BY DSC*
- Vol. 5, Issue 3, Pages: 228-233(1987)
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- Published：20 September 1987
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DONG Lisong, ZHENG Guodong, FENG Zhiliu. INVESTIGATION OF THE TRANSITIONS OF OLIGO-POLYSULFONES BY DSC*[J]. 1987, 5(3): 228-233.
DOI：

DONG Lisong, ZHENG Guodong, FENG Zhiliu. INVESTIGATION OF THE TRANSITIONS OF OLIGO-POLYSULFONES BY DSC*[J]. 1987, 5(3): 228-233. DOI：

摘要

The transitions of bisphenol A and phenolphthalein o|igopolysulfones were investigated by DSC. It is found that both the oligomers have three transitions within the temperature range (230-550K) studied. Considering the strong dependence of the appearance of the two transitions

lower and higher than Tg

on the specimens' thermal history

i. e.

temperature and time of heat-treatment

and their particular molecular strueture

it is proposed that these two transitions are morphological in origin arid are due to the disordering of relatively short range order of very small regions

and to the disordering of relatively well-ordered intra or/and intermolecular segments

respectively.Equations for linear relationship between Tg and 1/Mn for both the oligomers are given in the paper.

Abstract

lower and higher than Tg

on the specimens' thermal history

i. e.

temperature and time of heat-treatment

and their particular molecular strueture

it is proposed that these two transitions are morphological in origin arid are due to the disordering of relatively short range order of very small regions

and to the disordering of relatively well-ordered intra or/and intermolecular segments

respectively.Equations for linear relationship between Tg and 1/Mn for both the oligomers are given in the paper.

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