Correlation between the Glass Transition Temperatures and Repeating Unit Structure for High Molecular Weight Polymers

2003 ◽  
Vol 43 (2) ◽  
pp. 643-650 ◽  
Author(s):  
Chenzhong Cao ◽  
Yuanbin Lin
Keyword(s):  
Molecular Weight ◽  
Glass Transition ◽  
High Molecular Weight ◽  
Transition Temperatures ◽  
Glass Transition Temperatures ◽  
Unit Structure ◽  
High Molecular Weight Polymers

Glass Transition Behavior of Polyisoprene: The Influence of Molecular Weight, Terminal Hydroxy Groups, Microstructure, and Chain Branching

1982 ◽  
Vol 55 (1) ◽  
pp. 245-252 ◽  
Author(s):  
C. Kow ◽  
M. Morton ◽  
L. J. Fetters ◽  
N. Hadjichristidis
Keyword(s):  
Molecular Weight ◽  
Differential Scanning Calorimetry ◽  
Glass Transition ◽  
Low Molecular Weight ◽  
Hydroxyl Groups ◽  
Transition Temperatures ◽  
Scanning Calorimetry ◽  
Chain Branching ◽  
Glass Transition Temperatures ◽  
Hydroxy Groups

Abstract The glass transition temperatures for a series of high-1,4 linear and star-branched polyisoprenes have been measured by differential scanning calorimetry. The Fox-Flory relation for the linear polyisoprenes was found to be Tg=Tg∞−1.76×104Mn−1. The influence of hydroxyl groups on Tg was also examined for low molecular weight (<2.2×104) polyisoprenes.

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