Influence of nanoparticles on the shrinkage control of low profile unsaturated polyester composites

Liqun Xu, L. James Lee

Research output: Contribution to conferencePaperpeer-review

Abstract

Unsaturated polyester (UP) resins are one of the most widely used materials in fabricated composites. However, a number of problems caused by their high polymerization shrinkage have limited their growth in many new markets. Our research results showed that 1-3 wt% of nanoclay can provide excellent volume shrinkage control of UP resin systems containing polyvinyl acetate (PVAc) as a low profile additive (LPA) in room temperature molding processes. Nanoclay residing in the LPA-rich phase led to a higher reaction rate and earlier onset of micro-cracking in the resin system. Consequently, an earlier volume expansion during curing was observed in the reactive dilatometry experiment, resulting in better shrinkage control.

Original languageEnglish
Pages1451-1455
Number of pages5
StatePublished - May 2004
EventANTEC 2004 - Annual Technical Conference Proceedings - Chicago, IL., United States
Duration: 16 May 200420 May 2004

Conference

ConferenceANTEC 2004 - Annual Technical Conference Proceedings
Country/TerritoryUnited States
CityChicago, IL.
Period16/05/0420/05/04

Keywords

  • Low profile additive
  • Low temperature cure
  • Nanoclay
  • Unsaturated polyester resin
  • Volume shrinkage control

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