Journal ArticleDOI
Polymer blends based on polyolefin elastomer and polypropylene
Ana Lúcia Nazareth da Silva,Maria Inês Bruno Tavares,Daniel P. Politano,Fernanda M. B. Coutinho,Marisa C. G. Rocha +4 more
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TLDR
In this article, the effectiveness of polyethylene elastomer (POE) as an impact modifier for polypropylene in relation to the traditional modifier EPDM was analyzed by solid-state 13C nuclear magnetic resonance (13C-NMR) spectroscopy, scanning electron microscopy, and differential scanning calorimetry (DSC).Abstract:
A new family of homogeneous polyolefin polymers that exhibit unique molecular and rheological properties designated polyolefin elastomers (POEs) are characterized by a narrow molecular weight and high degrees of comonomer distribution. Because these copolymers are often elastomeric in nature, one of the uses for these materials is as impact properties improver for brittle polymers such as polypropylene at low temperatures. In this work a study was carried out about the effectiveness of the polyethylene elastomer (POE) as an impact modifier for polypropylene in relation to the traditional modifier EPDM. In this study the flow properties of of the POE/PP and EPDM/PP blends were also evaluated. The blends were analyzed by solid-state 13C nuclear magnetic resonance (13C-NMR) spectroscopy, scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). The results showed that PEE/PP and EPDM/PP blends present a similar crystalline behavior, which resulted in a similar mechanical performance of the blends, on the composition analyzed. It was also verified that the POE/PP blend presents lower torque values than the EPDM/PP blend, which indicates a better processability when POE is used as an impact modifier. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 2005–2014, 1997read more
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Rheology, phase morphology, mechanical, impact and thermal properties of polypropylene/metallocene catalysed ethylene 1-octene copolymer blends
TL;DR: In this paper, a polypropylene (PP) and a metallocene catalysed ethylene-octene copolymer (EOCP) were prepared using a single screw extruder fitted with a barrier screw design.
Journal ArticleDOI
Evaluation of polypropylene/polyolefin elastomer blends for potential recyclable HVDC cable insulation applications
TL;DR: In this paper, the microstructure and properties of polypropylene/polyolefin elastomer (PP/POE) blends for potential recyclable HVDC cable insulation applications were evaluated.
Journal ArticleDOI
Mechanical and rheological properties of composites based on polyolefin and mineral additives
A.L.N. da Silva,Marisa C. G. Rocha,M.A.R. Moraes,C.A.R. Valente,Fernanda M. B. Coutinho,Fernanda M. B. Coutinho +5 more
TL;DR: In this article, results of rheological and mechanical analysis on polypropylene composites prepared with talc and CaCO 3 are reported, showing that the addition of fillers provoked an increase in modulus of elasticity, stress at break and yield stress.
Journal ArticleDOI
SBS and SEBS block copolymers as impact modifiers for polypropylene compounds
Flávia Oliveira Monteiro da Silva Abreu,Maria Madalena de Camargo Forte,Susana Alcira Liberman +2 more
TL;DR: In this article, the effect of the TPE type as an impact modifier for polypropylene (PP) and influence of the concentration of elastomer on the polymer properties was evaluated.
Journal ArticleDOI
Rheological, mechanical, thermal, and morphological properties of polypropylene/ethylene-octene copolymer blends
Ana Lúcia Nazareth da Silva,Marisa C. G. Rocha,Fernanda M. B. Coutinho,Fernanda M. B. Coutinho,Rosario E. S. Bretas,Carlos Henrique Scuracchio +5 more
TL;DR: In this article, the viscosities of polyethylene elastomer (PEE) and polypropylene (PP) were analyzed using an Instron capillary rheometer and a Rheometrics Dynamic Stress Rheometer, SR 200.