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| Volume 2, Issue 03 - 2006 |
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| 1 |
SHRINKAGE CONTROL OF UNSATURATED POLYESTER USING NANOSTRUCTURED PARTICLES: PART I - PROCESS DEVELOPMENT |
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| Pages 75-86 |
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| P. J. SCHUBEL, N. A. WARRIOR |
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| University of Nottingham, School of Mechanical, Materials and Manufacturing Engineering, University Park, Nottingham NG7 2RD, United Kingdom |
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| Received 16 June 2006; accepted 20 November 2006 |
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| A novel approach using exfoliated clays to reduce chemical resin shrinkage within styrene based unsaturated polyester resins via a so-called nanocomposite is presented. Two types of silicate clay (CloisiteŽ 10A and GaramiteŽ 1958) were investigated and compared to a conventional low profile additive (polyvinyl acetate) and calcium carbonate filler at various loadings. A suitable exfoliation process was established using in-situ, intercalative polymerisation with investigations into volumetric shrinkage, glass transition temperature and mechanical properties. The results indicate that a reduction in volumetric shrinkage is achievable due to the formation of exfoliated nano-scale silicates in a polymerised unsaturated polyester resin. Additional benefits to physical properties were also observed. |
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