As produced reactor copolymer, obtained by in-reactor grafting polymerization technology is a two-phase rigid polymer, which combines the best attributes of semicrystalline polypropylene and those of amorphous polystyrene. In the process, the
compatibilizer, PP-g-PS and the non-olefinic polymer component, PS are simultaneously generated from the monomer styrene. The reactor product which has higher modulus but lower impact resistance is further toughened by incorporation of EPR (ethylene propylene rubber) and SEBS (styrene-ethylene-butylene-styrene) triblock copolymer, via intensive melt-mixing in a downstream compounding operation. [Continues.]
A doctoral thesis submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.