Thermo-mechanical analysis of lead monoxide filled unsaturated polyester based polymer composite radiation shields

Particulate polymer composites of Isophthalate based unsaturated polyester resin filled with different concentrations of lead monoxide were prepared and investigated for physical, thermal, mechanical, and gamma radiation shielding characteristics. The results of thermo-mechanical studies have been d...

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Bibliographic Details
Published in:Journal of applied polymer science 2010-09, Vol.117 (6), p.3623-3629
Main Authors: Harish, V, Nagaiah, N, Prabhu, T. Niranjana, Varughese, K.T
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Cooling
Exact sciences and technology
Fillers
Forms of application and semi-finished materials
Heating
Polyester resins
polymer composites
Polymer industry, paints, wood
Polymer matrix composites
radiation shields
Reproduction
Technology of polymers
Thermal expansion
thermo-mechanical analysis
Unsaturated
unsaturated polyester
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Summary:Particulate polymer composites of Isophthalate based unsaturated polyester resin filled with different concentrations of lead monoxide were prepared and investigated for physical, thermal, mechanical, and gamma radiation shielding characteristics. The results of thermo-mechanical studies have been discussed in this article. The composites were investigated to understand the effect of filler on glass transition temperature (Tg) and thermal expansion coefficients (α) at various temperatures under cyclic heating and cooling conditions. The results show that Tg values of composites appear to decrease slightly with increasing filler content. The composites were observed to exhibit three phases of thermal expansion during first heating and cooling cycles where as they exhibit only two phases during second heating cycle. An anomalous expansion of the composites was observed in the temperature range from 60°C to 110°C only during first heating and it disappears in subsequent heating cycles. Further, all the composites were observed to exhibit a dimensional contraction only during first heating and cooling cycles. The cyclic heating and cooling technique using thermo-mechanical analyzer was observed to be very efficient in determining actual values of Tg and also in determining the post curing temperatures of the polymer and its composites.
ISSN:0021-8995
1097-4628
1097-4628
DOI:10.1002/app.32265