Toughened polystyrene containing high cis-1,4-polybutadiene rubber
| Autor: | G. Allen, H.J. Michels, K. Sardelis |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
Materials science
Polymers and Plastics Rubber toughening Izod impact strength test General Chemistry Surfaces Coatings and Films Styrene chemistry.chemical_compound Polybutadiene chemistry Natural rubber visual_art Materials Chemistry Copolymer visual_art.visual_art_medium Polystyrene Composite material Phase inversion |
| Zdroj: | Journal of Applied Polymer Science. 28:3255-3268 |
| ISSN: | 1097-4628 0021-8995 |
| DOI: | 10.1002/app.1983.070281020 |
| Popis: | High cis -1,4 -polybutadiene has been used to prepare toughened polystyrene in an attempt to improve its low temperature impact properties. A range of physical and mechanical properties was obtained by keeping the amount of rubber and the polymerization conditions constant, and varying the rate of agitation in a purpose -built reactor system. Although a good balance of tensile and impact properties is obtained at room temperature, the rubber partially crystallizes when the polyblends are cooled to below −40°C. This should decrease the efficiency of rubber particles to create and terminate crazes. However, it is significant that the developed crystallinity decreases with the rubber phase volume, and is suppressed almost completely at about 21% rubber phase volume (RPV). The factors influencing the RPV are discussed, and a study of the phase inversion with three different types of rubber shows that its duration depends on the viscosity of the styrene/rubber system. |
| Databáze: | OpenAIRE |
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