Photon correlation spectroscopic studies of poly(vinyl acetate) above the glass transition temperature

1985 ◽  
Vol 18 (7) ◽  
pp. 1492-1496 ◽  
Author(s):  
G. Fytas ◽  
C. H. Wang ◽  
G. Meier ◽  
E. W. Fischer
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Vinyl Acetate ◽  
Spectroscopic Studies ◽  
Photon Correlation

Study on the Reaction of Acetylated Konjac Glucomannan and EVA during Processing

2011 ◽  
Vol 695 ◽  
pp. 61-64 ◽  
Author(s):  
Xian Hong Li ◽  
Xiao Yan Lin ◽  
Xue Gang Luo ◽  
Ji Wei Li
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Konjac Glucomannan ◽  
Ft Ir

The transesterification in acetylated konjac glucomannan/ethylene vinyl acetate (AKGM/EVA) melting blend system with the presence of dibutyltin oxide (DBTO) catalyst was investigated by means of a torque rheometer during compounding. The characteristics of the products were evaluated by DSC and FT-IR. The glass transition temperature at about 179.4 °C was found in the DSC curve of AKGM-EVA, the equilibrium torque of AKGM/EVA with 0.25 wt% DBTO was lower than that without DBTO. The results showed that the transesterification took place in the AKGM/EVA blend system.

Novel Applications of the QCM Technique in Biomaterials Science

2007 ◽  
Vol 1060 ◽  
Author(s):  
Candida Costa Silva ◽  
David C Lin ◽  
Iren Horkayne-Szakaly ◽  
Peter J Basser ◽  
Ferenc Horkay
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Vinyl Acetate ◽  
Reasonable Agreement ◽  
Quartz Crystal ◽  
Vapor Sorption ◽  
Different Temperatures ◽  
Novel Applications ◽  
Quartz Sensor

ABSTRACTA quartz crystal microbalance (QCM) has been used to investigate polymer samples. The vapor sorption of three different polymer samples (poly(vinyl acetate), polybutadiene and polydimethylsiloxane) was studied. The change in resonance frequency of the quartz sensor uniformly coated with polymer films was measured as a function of the film thickness and water absorption at different temperatures. The range of linear frequency vs. mass response was determined in the absence of absorbed water. The glass transition temperature of thin poly(vinyl acetate) films (10 nm <thickness< 1000 nm) was found to be in reasonable agreement with published values for macroscopic samples.

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