Crystalline Syndiotactic Polystyrene as Reinforcing Agent of cis-1,4-Polybutadiene Rubber
| Autor: | Alfonso Grassi, Cinzia Cuomo, Antonio Buonerba, Vito Speranza |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Polymers and Plastics Organic Chemistry Carbon black Inorganic Chemistry chemistry.chemical_compound Crystallinity Polybutadiene chemistry Natural rubber Chemical engineering Polymerization visual_art Tacticity Polymer chemistry Materials Chemistry visual_art.visual_art_medium Polystyrene Polymer blend |
| Zdroj: | Macromolecules. 43:367-374 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/ma901859e |
| Popis: | Syndiotactic polystyrene (sPS), a thermoplastic polymer characterized by high crystallinity, good chemical resistance and high modulus, has been successfully tested as a reinforcing agent for cis-1,4-polybutadiene (PB) rubber. Blends of sPS and PB have been in situ synthesized using a multistep polymerization process catalyzed by monocyclopentadienyl titanium compounds activated with MAO. This procedure assures an intimate mixing of the components and homogeneous dispersion of the sPS particles having dimension from few hundreds of nanometers to micrometers. The analysis of the mechanical properties of the sPS−PB blends obtained using this process showed enhanced Young’s modulus, toughness, σbreak and e break: these properties were found to be 1 order of magnitude higher than those of PB and comparable to those of PB charged with inorganic filler as carbon black or silica. A multiblock copolymer (sPSB) comprising segments of sPS and PB was successfully in situ synthesized with the sPS and PB homopolymers ... |
| Databáze: | OpenAIRE |
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