Morphology, static and dynamic mechanical properties of in situ microfibrillar composites based on polypropylene/poly (ethylene terephthalate) blends

Jayanarayanan, K; Thomas, Sabu; Joseph, Kuruvilla

doi:10.1016/j.compositesa.2007.11.008

Cited by 133 publications

(79 citation statements)

References 39 publications

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“…The damping behaviour of a polymer blend is governed by the mechanical relaxation of the two blended polymers, the content used and the interface between the two polymers. In composites, the damping transitions are characterized by the mechanical relaxation of the polymer matrix and the filler, the content used and the filler size or length [33,34]. Figure 8 shows a comparison of tanδ as a function of temperature of PP, MAPP, LLDPE, the PP/ LLDPE and MAPP/LLDPE blends, and their 10% WP containing blend composites.…”

Section: Dynamic Mechanical Analysis (Dma)mentioning

confidence: 99%

“…With the presence of other components in the polymer, the amount of polymer in a blend or composite decreases and the polymer structure becomes partially loosened so as to accommodate the other component. The decrease in the quantity of matrix used and the loosening of the polymer structure lead to a reduction in the intensity of the damping peak [33].…”

Section: Dynamic Mechanical Analysis (Dma)mentioning

confidence: 99%

“…Both PP and MAPP have a β-transition peak at about 16°C. This transition corresponds to the glass transition (T g ) of the amorphous region in PP and MAPP [24,33]. LLDPE has a β-transition at -15°C, which is related to the movement of polymer side or short chains [35].…”

Section: Dynamic Mechanical Analysis (Dma)mentioning

confidence: 99%

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Comparative study of the morphology and properties of PP/LLDPE/wood powder and MAPP/LLDPE/wood powder polymer blend composites

Dikobe¹,

Luyt

2010

Express Polym. Lett.

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Abstract. In this study, polypropylene (PP)/linear low-density polyethylene (LLDPE) and maleic anhydride grafted polypropylene (MAPP)/LLDPE blend systems were comparatively investigated. The blends and composites contained equal amounts of the two polymers, and the compatibility and miscibility between the two polymers were investigated. Composites with 10, 20 and 30 wt% wood powder (WP), but still with equal amounts of the two polymers, were prepared and investigated. The morphologies, as well as mechanical and thermal properties, of the blends and the blend composites were investigated. The MAPP/LLDPE blend and composites showed better properties than the PP/LLDPE blend and composites as a result of the stronger interfacial interaction between MAPP, LLDPE and WP. The SEM and DSC results of the PP/LLDPE/WP blend composites showed that WP located itself more in the LLDPE phase. In the MAPP/LLDPE/WP composites the WP was in contact with both polymers, although it had a greater affinity for MAPP. The TGA results show that the MAPP/LLDPE blend and composites are more thermally stable than the PP/LLDPE blend and composites.

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Section: Dynamic Mechanical Analysis (Dma)mentioning

confidence: 99%

Section: Dynamic Mechanical Analysis (Dma)mentioning

confidence: 99%

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Comparative study of the morphology and properties of PP/LLDPE/wood powder and MAPP/LLDPE/wood powder polymer blend composites

Dikobe¹,

Luyt

2010

Express Polym. Lett.

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“…O valor de E'' maior quer dizer que há maior restrição na mobilidade das cadeias poliméricas [33] . Essa restrição na mobilidade das cadeias pode estar associada à maior rigidez da matriz de polietileno devido à presença das nanocargas.…”

Section: Fim F C Et Al -Comparação Entre Nanocompósitos De Polietunclassified

Comparação entre Nanocompósitos de Polietileno/Nanotubos de Carbono e Polietileno/Nanolâminas de Grafeno Obtidos por Polimerização In Situ

Fim¹,

Radaelli²,

Azambuja³

et al. 2014

Polímeros

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Resumo: Nanocompósitos de polietileno/nanotubos de carbono foram sintetizados através da polimerização in situ para serem comparados com nanocompósitos de polietileno/nanolâminas de grafeno, obtidos nas mesmas condições. Os nanocompósitos de polietileno/NTC foram obtidos com boas atividades catalíticas e foram caracterizados por DSC e MET. Os nanocompósitos com NG apresentaram melhor estabilidade térmica que os de NTC, porem não houve diferenças significativas nas propriedades dinâmico-mecânicas. No estudo da condutividade elétrica os nanocompósitos PE/NTC atingiram condutividades de materiais semicondutores com menor teor de nanocarga que os de PE/NG. Palavras-chave: Nanolâminas de grafeno, nanotubos de carbono, polietileno, nanocompósitos. Comparison between Polyethylene/Carbon Nanotubes and Polyethylene/Graphene Nanosheets Nanocomposites Obtained by In Situ Polymerization Abstract: Polyethylene/carbon nanotubes, PE/NTC, nanocomposites were synthesized by in situ polymerization for comparison with polyethylene/graphene nanosheets, PE/NG, nanocomposites obtained in the same conditions. The nanocomposites of polyethylene/NTC were obtained with good catalytic activities and were characterized by DSC and TEM. The nanocomposites with NG showed better thermal stability than with NTC, however, no significant differences in dynamic mechanical properties were found. In the electrical conductivity study, PE/NTC nanocomposites reached conductivities of semiconductor materials at lower content of filler than PE/NG nanocomposites.

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“…The effectiveness of immiscible blends is strongly influenced by phase morphology i.e. shape and size as well as the properties of each polymer component [1][2][3] . Polymer blending has the following advantages: cheap, easily processable, and distinct properties can be achieved depending on the composition and preparation methods 4,5 .…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of EG and Cloisite 15A on the Thermomechanical Properties and Thermal Conductivity of EVA/PCL Blend

et al. 2016

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The purpose of this study was to investigate the synergy of expanded graphite (EG) and Cloisite 15A (C15A) on the thermal conductivity and thermomechanical properties of ethylene-vinyl acetate copolymer/poly (ɛ-caprolactone) (EVA/PCL) blend. Scanning electron microscopy (SEM) results showed that the blend had a phase separation, in which the PCL phase (appeared as droplets) was dispersed uniformly in the EVA matrix in all samples. The results from SEM and X-ray diffraction (XRD) showed that as the EG content increases, graphite sheets increase, leading to a high probability of re-stacking and poor dispersion as well, however the synergy rendered an increase in the storage modulus for the composite containing low content of EG (5phr) in both the EG and clay containing samples. The addition of EG showed a slight increase in thermal stability,but the presence of C15A decreased the onset of degradation of EVA/PCL blend. However, at high temperatures the synergistic effect of EG and C15A showed better thermal stability for EVA/PCL blend than EG alone. The addition and increase in EG content improved thermal conductivity of the EVA/PCL blend in both the clay containing and EG containing samples, however the clay-containing samples showed lower values compared to EG only.

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Morphology, static and dynamic mechanical properties of in situ microfibrillar composites based on polypropylene/poly (ethylene terephthalate) blends

Cited by 133 publications

References 39 publications

Comparative study of the morphology and properties of PP/LLDPE/wood powder and MAPP/LLDPE/wood powder polymer blend composites

Comparative study of the morphology and properties of PP/LLDPE/wood powder and MAPP/LLDPE/wood powder polymer blend composites

Comparação entre Nanocompósitos de Polietileno/Nanotubos de Carbono e Polietileno/Nanolâminas de Grafeno Obtidos por Polimerização In Situ

Synergistic Effect of EG and Cloisite 15A on the Thermomechanical Properties and Thermal Conductivity of EVA/PCL Blend

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