Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Toughening of polypropylene with β-nucleated thermoplastic vulcanizates based on polypropylene/ethylene–propylene–diene rubber blends
Graphical abstract Display Omitted
Highlights We designed and prepared β nucleated thermoplastic vulcanizates. We adopted the β nucleated TPV to toughen polypropylene. Greatly improved toughness of iPP, limited loss in strength and rigidity was achieved. A toughening mechanism was proposed.
Abstract A series of dynamically vulcanized isotactic polypropylene (PP)/ethylene–propylene–diene rubber thermoplastic vulcanizates (TPVs) containing different content of β-nucleating agent (β-NA) were prepared and introduced into isotactic PP matrix as a toughening agent. The effect of β-nucleated TPVs (β-TPVs) on the toughness and other properties of PP were studied. Differential scanning calorimetry and wide-angle X-ray diffraction results indicated that the β-crystallinity and the relative content of β-phase in β-TPVs samples and the toughened blends increased with the content of β-NA increasing. The notched impact strength of PP toughened by β-TPVs, with limited loss in the tensile strength and rigidity, showed an almost linear increase with increasing β-NA content. Especially when the content of β-NA was 0.5wt%, the impact strength of the toughened blends was ten times more than that of pure PP. The toughening mechanism based on classical rubber toughening mechanisms was discussed and a synergic toughening mechanism was proposed.
Toughening of polypropylene with β-nucleated thermoplastic vulcanizates based on polypropylene/ethylene–propylene–diene rubber blends
Graphical abstract Display Omitted
Highlights We designed and prepared β nucleated thermoplastic vulcanizates. We adopted the β nucleated TPV to toughen polypropylene. Greatly improved toughness of iPP, limited loss in strength and rigidity was achieved. A toughening mechanism was proposed.
Abstract A series of dynamically vulcanized isotactic polypropylene (PP)/ethylene–propylene–diene rubber thermoplastic vulcanizates (TPVs) containing different content of β-nucleating agent (β-NA) were prepared and introduced into isotactic PP matrix as a toughening agent. The effect of β-nucleated TPVs (β-TPVs) on the toughness and other properties of PP were studied. Differential scanning calorimetry and wide-angle X-ray diffraction results indicated that the β-crystallinity and the relative content of β-phase in β-TPVs samples and the toughened blends increased with the content of β-NA increasing. The notched impact strength of PP toughened by β-TPVs, with limited loss in the tensile strength and rigidity, showed an almost linear increase with increasing β-NA content. Especially when the content of β-NA was 0.5wt%, the impact strength of the toughened blends was ten times more than that of pure PP. The toughening mechanism based on classical rubber toughening mechanisms was discussed and a synergic toughening mechanism was proposed.
Toughening of polypropylene with β-nucleated thermoplastic vulcanizates based on polypropylene/ethylene–propylene–diene rubber blends
Ma, Li-Feng (Autor:in) / Wang, Wei-Kang (Autor:in) / Bao, Rui-Ying (Autor:in) / Yang, Wei (Autor:in) / Xie, Bang-Hu (Autor:in) / Yang, Ming-Bo (Autor:in)
18.04.2013
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2013