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Behavior comparison of PMMA-PTEGDMA copolymerized by two different methods.

Published online by Cambridge University Press:  01 February 2011

R. Velazquez ,
J. Reyes  and
V.M. Castaño
R. Velazquez
Affiliation:
Instituto de Física, U.N.A.M. Apdo Postal 1-1010 Querétaro, Qro. México
J. Reyes
Affiliation:
Instituto de Física, U.N.A.M. Apdo Postal 1-1010 Querétaro, Qro. México
V.M. Castaño
Affiliation:
Instituto de Física, U.N.A.M. Apdo Postal 1-1010 Querétaro, Qro. México
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Abstract

The acrylic system consisting of a casting syrup [made of polymethyl methacrylate (PMMA) dissolved in methyl methacrylate (MMA) monomer] and triethylene glycol dimethacrylate (TEGDMA) monomer was polymerized by two different methods. One of these methods was made by thermal decomposition of benzoil peroxide (BP) as initiator, and the other one, used the promoted decomposition of BP using dimethyl p-toluidine (DMT). Both types of polymerization were carried out by bulk polymerization in closed test tubes. Since the polymerization reactions were over, the polymer obtained from the two methods were very different each other in appearance and, when characterization analysis were performed those gave evidence of different behavior between the two types of polymers. The characterization study was carried out using Scanning Electron Microscopy (SEM) to observe the morphology and microstructure in the polymers. Fourier Transform Infrared (FTIR), Raman and micro-Raman to analyze differences on the chemical compositions in the polymer bulk. Differential Scanning Calorimetry (DSC) to evaluate the thermal behavior, Dilatometry to determine the final cure shrinkage after polymerization reaction in the two types of polymers.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 725: Symposium P – Organic and Polymeric Materials and Devices-Optical, Electrical, and Optoelectronic Properties , 2002 , P9.23
Copyright
Copyright © Materials Research Society 2002

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References

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