Witold Brostow (a), Victor M. Castaño (a, b) and Gonzalo Martinez-Barrera (a,c)
(a)
Laboratory of
Advanced Polymers and Optimized Materials (LAPOM),
Department of Materials Science, University of North Texas, Denton, TX
76203-5310, USA; Denton, TX 76203, USA;
(b) Centro de Fisica Aplicada y
Tecnologia Avanzada (CFATA),
Universidad Nacional Autonoma de Mexico,
AP 1-1010, Queretaro, Qro. 76001, Mexico
(c)
Laboratorio de Investigacion y Desarrollo de Materiales Avanzados (LIDMA),
Facultad de Quimica,
Universidad Autonoma del Estado de Mexico, Km. 12 de la carretera Toluca-Atlacomulco,
San Cayetano 50200, Mexico
Blends with 0, 5, 10 and 13 weight % of styrene/butadiene (SBR) copolymer
embedded in a rigid polystyrene matrix were prepared. Microhardness was
determined and morphology evaluated by scanning electron microscopy (SEM) before
and after gamma irradiation. We relate the morphology to chemical structure and
to composition of the SBRs as well as to irradiation dosages. We also connect
the microhardness to the impact strength determined previously.