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- Title
LOW MELT VISCOSITY NOVEL BLEND BASED ON POLYPROPYLENE OBTAINED BY THE ADDITION OF CYCLICBUTYLENETEREPHTHALATE
- Authors
ASTIGARRAGA RUIZ DE VELASCO, VICTORIA; GONDRA ZUBIETA, KOLDO; VALEA PEREZ, ANGEL
- Abstract
In this work, polymeric blends based on polypropylene (PP) combined with cyclic butylene terephthalate (CBT) and maleic anhydride grafted polypropylene (PP-g-AM) have been prepared and studied for applications in thermoplastic composites and as multimaterial composites for automotive industry. The principal aim has been to reduce the melt viscosity of thermoplastic matrixes to values similar to thermosetting ones in order to be able to use more economic equipment for the thermoplastic composites development.. For that purpose, different polymeric blends of CBT/PP have been prepared, and the effect of the addition of a PP-g-AM compatibilizer in the fibrillar morphology and in the rheological behavior of the compounds has been analyzed. For compatibilized blends, apart from a substantial reduction of the size of CBT, a thixotropic behavior has been observed, with a marked reduction of the viscosity at the beginning of the shear test followed by a slight restoration at the conclusion of the shear stress. Stationary values as low as 20000 mPa.s have been registered which corresponds with a reduction greater than 90% from PP viscosity. Keywords: Polymer blending, thermoplastic composites, compatibilizer , fibrillar morphology, viscosity, thixotropic.
- Publication
DYNA, 2018, Vol 93, Issue 1, p308
- ISSN
1989-1490
- DOI
10.6036/8576