The Effect of Addition-Fragmentation Chain Transfer Agent on Shrinkage-Induced Stress in acrylate Monomers

Monomers containing acrylate and methacrylate groups are very active in radical polymerization and,due to the rapid formation of a network with a high cross-link density, stress accumulation occurs,which causes the creation of small cracks in the polymer bulk deteriorating the mechanical properties.Using the addition-fragmentation chain transfer polymerization method (AFCT) is a suitableapproach to reduce the polymerization induced stress in polymers. Ethyl ۲-(tosylmethyl)acrylate wassynthesized and used as an AFCT agent. Degree of conversion and shrinkage-induced stress wereinvestigated. Methyl methacrylate was also used as control additive. The agent successfully decreasestress without reduction in conversion.

کلیدواژه ها:

Polymer Synthesis and Characterization ، AFCT ، Dental Materials