Efeito do uso de compabilizante e do tempo de processamento sobre as propriedades termicas, morfologicas, reologicas e mecanicas da blenda PET/PP

AUTOR(ES)
DATA DE PUBLICAÇÃO

1997

RESUMO

This work the study of the effects of the processing time and compatibilizer addition on the properties of poly(ethylene terephthalate) (PET), polypropylene (PP) and PET/PP blends. The samples were prepared by melt blending in the Mini Max Molder CS-183MMX, at 265 DEGREES C, with processing time of: 1 min. 20 sec.; 5 min.; and 15 min. The PET/PP blend compositions (wt/wt) used in this work were: 100/0; 90/10; 70/30; 50/40; 50/50; and 0/100; with and without 3% of Polypropylene grafted Maleic Anhydride (PP-g-MA). The samples were studied by thermal, morphological, rheological and mechanical analysis. The rheological characterization was evaluated by eccentric-disk-orthogonal rheometer, Mini Max Dynamic Tester CS-183DY . The measurements of the dynamic modulus G and G , were used to observe the compatibilization effect and polymer degradation on the viscoelastic behavior of the blends. The modification caused by the blending process in PET s crystallization temperature, were studied by Differential Scanning Calorymetry (DSC) using two methods: anisothermal and isothermal crystallization. The morphological analysis were performed by Scanning Electron Microscopy (SEM) in which it was observed a strong influence of compatibilizer and processing time in dispersion grade and phase diameter. The best dispersion was obtained with processing time of 15 minutes and compatibilizer addition... Note: The complete abstract is available with the full electronic digital thesis or dissertations

ASSUNTO(S)

mistura (quimica) polimeros - testes polipropileno

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