Effect of Initiator on Thermal Curing of Unsaturated Polyester Resins

One of the common methods to cure unsaturated polyester resins is to use dualinitiators. In order to produce an appropriate composite, it is necessary toknow the effect of dual initiators on curing behavior. In this paper the effectof benzoyl peroxide, BPO, and tertiary butyl perbenzoate, TBPB, and their mixtures onthermal curing of an unsaturated polyester resin have been investigated. BPO and TBPBare medium and high temperature initiators, respectively. SPI and DSC tests have beenused for this evaluation.