Improvement of impact properties of polypropylene by modification with very low-density polyethylene
| Autor: | Keun Young Lee, Jae Hun Shim, Eung-Soo Kim, Jin-San Yoon, Ji Yoon Woo |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Polypropylene
Materials science Polymers and Plastics Izod impact strength test General Chemistry Polyethylene Methacrylate Silane Surfaces Coatings and Films chemistry.chemical_compound Low-density polyethylene chemistry Ultimate tensile strength Materials Chemistry Polymer blend Composite material |
| Zdroj: | Journal of Applied Polymer Science. 121:3547-3552 |
| ISSN: | 0021-8995 |
| DOI: | 10.1002/app.34143 |
| Popis: | Very low-density polyethylene (VLDPE) was compounded with polypropylene (PP) to improve its impact strength. VLDPE was modified by grafting 3-(trimethoxysilyl) propyl methacrylate silane (MS) to VLDPE to prepare mVLDPE. PP was melt-mixed either with VLDPE or mVLDPE together with Cloisite®20A (C20A). The composites exhibited a phase-separated morphology, irrespective of whether the VLDPE had been modified with the silane compounds or not. Incorporation of C20A decreased the domain size of the dispersed phases of both PP/VLDPE and PP/mVLDPE blends. The tensile strength and elongation at break of PP/VLDPE and PP/mVLDPE were improved by the addition of C20A. In contrast, their impact strengths were reduced by the clay. However, the decrease in impact strength was less significant in PP/mVLDPE/C20A than in PP/VLDPE/C20A. The superior mechanical properties of PP/mVLDPE/C20A over PP/VLDPE/C20A were attributed to enhanced interfacial interactions originating from chemical reactions between silane residues on mVLDPE and the silanol groups of C20A. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011 |
| Databáze: | OpenAIRE |
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