Differential scanning calorimetric and free volume study of reactive compatibilization by EPM-g-MA of poly(trimethylene terephthalate)/EPDM blends

Ravikumar, H. B. and Ranganathaiah, C. and Kumaraswamy, G. N. and Deepa Urs, M. V. and Jagannath, J. H. and Bawa, A. S. and Thomas, Sabu (2006) Differential scanning calorimetric and free volume study of reactive compatibilization by EPM-g-MA of poly(trimethylene terephthalate)/EPDM blends. Journal of Applied Polymer Science, 100 (1). pp. 740-747. ISSN 1097-4628

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Abstract

Abstract Differential scanning calorimetry (DSC) and positron annihilation lifetime measurements have been carried out to study the effect of the compatibilizer maleic anhydride grafted ethylene propylene copolymer (EPM-g-MA) in poly trimethylene terephthalate and ethylene propylene diene monomer (PTT/EPDM) immiscible blends. The DSC results for the blends of 50/50 and 30/70 compositions show two clear glass transition temperatures, indicating that the blends are two-phase systems. With the addition of compatibilizer, the separation between the two glass transitions decreased, suggesting an increased interaction between the blend components with compatibilizer. At 5 wt % of compatibilizer, the separation between the Tgs reduced in both 50/50 and 30/70 blends. The positron results for the blends without compatibilizer showed an increase in relative fractional free volume, as the EPDM content in the blend is increased. This suggests the coalescence of free volume of EPDM with the free volumes of PTT due to phase separation. However, the effect of compatibilizer in the blends was clearly seen with the observed minimum in free volume parameters at 5% of the compatibilizer, further suggesting that this percent of compatibilizer seems to be the optimum value for these blends. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 740–747, 2006

Item Type:	Article
Uncontrolled Keywords:	differential scanning calorimetry, PTT/EPDM blend, glass transition temperature, o-Ps lifetime, free volume, compatibilizer
Subjects:	D Physical Science > Physics
Divisions:	Department of > Physics
Depositing User:	LA manjunath user
Date Deposited:	23 Aug 2019 05:59
Last Modified:	06 Jan 2023 10:25
URI:	http://eprints.uni-mysore.ac.in/id/eprint/6946

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