Journal of Polymer Research

, Volume 18, Issue 4, pp 621–626 | Cite as

Reaction kinetics and physical properties of unsaturated polyester modified with methylacyloxylpropyl-POSS

  • Jun-gang Gao
  • Shi-rong Li
  • De-juan Kong
Original Paper


The polyhedral oligomeric silsesquioxanes which contains methylacryloylpropyl group (MAP-POSS) was synthesized and used to modify unsaturated polyester resin (UPR). The cure kinetics was investigated by isothermal DSC technique. The mechanical and electrical properties of fiberglass-reinforced laminate were determined. The result shows that the reaction can be described by a Kamal autocatalytic model which has two reaction rate constants k 1 and k 2, and two apparent activation energies E a1 and E a 2 are 98.12 kJ/mol and 74.01 kJ/mol, respectively. UPR and MAP-POSS can co-cure in free radical polymerization. When the MAP-POSS content is 5 wt%, the impact and tensile strength of fiberglass-reinforced laminate enhanced 10% and 6%, respectively, and has better electrical properties than no MAP-POSS. The dielectric constant ε and dielectric loss tanδ are all decrease. The surface resistance ρ s is 4.7 times higher than pure UPR laminates


Silsesquioxanes Unsaturated polyester Composites 



The authors gratefully acknowledge the financial support from the Nature Science Foundation (No.E2007000204) of Hebei Province, China.


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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.College of Chemistry and Environmental ScienceHebei UniversityBaodingChina
  2. 2.Department of Public HealthBaotou College of Medical ScienceBaotouChina

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