Hyderabad, A.P, India, was used. The Chalk powder is used as additive for present work
Preparation
In present work the composites were prepared by hand lay-up technique. The matrix of unsaturated polyester and monomer of styrene are mixed in the ratio of 100:25 part by weight respectively. Later the additive chalk power is mixed thoroughly and then the accelerator of methyl ethyl ketene peroxide 1% by weight and catalyst of Cobalt Naphthenate of 1% by weight were added to the mixture and mixed thoroughly. The releasing agent of silicon is sprayed to glass mould and the matrix mixture is poured in to the mould. The fibre is added to matrix mixture, which was poured in the