E.s.r. and saturation transfer e.s.r. spectroscopy of spin-probed poly(vinyl acetate): A new spectral transition correlating with glass transition temperature

Polymer ◽  
1986 ◽  
Vol 27 (2) ◽  
pp. 190-194 ◽  
Author(s):  
Isabel S. Miles ◽  
G. Gordon Cameron ◽  
Anthony T. Bullock
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Vinyl Acetate ◽  
Saturation Transfer ◽  
Spectral Transition

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.

Study on Preparation and Properties of Pressure Sensitive Adhesive of Acrylate Prepared by Miniemulsion

2011 ◽  
Vol 183-185 ◽  
pp. 1938-1941
Author(s):  
Jiu Yin Pang ◽  
Chuan Sun ◽  
Shi Cheng Zhang ◽  
Zhen Xing
Keyword(s):  
Molecular Weight ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Vinyl Acetate ◽  
Butyl Acrylate ◽  
Peel Strength ◽  
Excellent Performance ◽  
Pressure Sensitive Adhesive ◽  
Pressure Sensitive

Miniemulsion was prepared by means of different ratio of butyl acrylate with vinyl acetate emulsion pressure sensitive adhesive excellent performance. Focused on acrylic acid and vinyl acetate copolymers of different proportions of the glass transition temperature, molecular weight and molecular weight distribution of micro-factors, and build the macroscopic properties of the copolymer glass transition temperature and molecular weight between contacts. The use of APS as initiator under the conditions of the experiment found that with the increase of acrylic, PVC-floor, 180 peel strength composite materials decreased. While the molecular weight of butyl acrylate with the increase of the amount did not change significantly, the initial viscosity of the polymer and 180 º peel strength is improved, but the adhesive holding down quickly.

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