Gamma irradiation effect on polystyrene + SBR blends:

morphology and microhardness
 

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

 


ABSTRACT

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.
 


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