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Ethylene–Propylene–Diene Rubber as a Modifier for Weather-Resistant High-Impact Styrene Copolymers
| Content Provider | Semantic Scholar |
|---|---|
| Author | Rupyshev, V. G. Gavrichenkova, E. A. |
| Copyright Year | 2004 |
| Abstract | An important area of application of elastomeric materials is their use in the synthesis of high-impact styrene copolymers. Rubber-reinforced polymers possess higher impact strength and breaking elongation and lower brittleness [1]. The elastomers used in such copolymers are mainly butadiene rubbers which have a low glass transition temperature and are capable of taking part in reactions of grafting and crosslinking. However, during service, with exposure to sunlight, the impact strength and other mechanical properties of high-impact styrene copolymers (high-impact polystyrene and ABS copolymers), and also their appearance, deteriorate [2]. A reliable means of improving the weather resistance of polystyrene plastics is to use, as the elastomers, rubbers with increased weather resistance, a low content of double bonds, and UV radiation resistance [3]. Most promising for these purposes is comparatively cheap ethylene–propylene–diene rubber (SKEPT) with a low degree of non-saturation. This rubber is a statistical terpolymer of ethylene, propylene, and diene comonomer. The propylene content in the rubber should amount to 40–45% to ensure plasticity of the elastomer [4]. As diene comonomers to be used in SKEPT production, of most interest are ethylidene-norbornene (ENB) and dicyclopentadiene (DCP) which possess high reactivity in copolymerisation reactions [5]. The SKEPT rubbers investigated (the SKEPT specimens were provided by the S. V. Lebedev Scientific Research Institute for Synthetic Rubber Federal State Unitary Enterprise in St Petersburg) have been used as modifiers in the production of high-impact polystyrene (HIP) by the block suspension method [6] and in the production of a ternary copolymer of the ABS type (styrene–acrylonitrile–SKEPT (St–AN–SKEPT)) by continuous bulk polymerisation [7]. |
| Starting Page | 15 |
| Ending Page | 18 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| DOI | 10.1177/0307174x0403100304 |
| Volume Number | 31 |
| Alternate Webpage(s) | http://www.polymerjournals.com/pdfdownload/920337.pdf |
| Alternate Webpage(s) | https://doi.org/10.1177/0307174x0403100304 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
