Thermal and crystallisation behaviour of isotactic polypropylene/nitrile rubber blends

George, Soney C.; Varughese, K. T.; Thomas, Sabu

doi:10.1016/s0032-3861(99)00719-3

Cited by 146 publications

(107 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The obtained results conform with the results of George et al, 44 in which they found that the degradation of NBR (the AN content, 34%) occurred in two stages. In the first stage, it started at 414…”

Section: Thermal Stability Of Rubber-clay Compositessupporting

confidence: 91%

Electrical Properties of Irradiated Rubber‐Clay Composites Based on NBR and SBR

2012

View full text Add to dashboard Cite

ABSTRACT:The electrical and thermal properties of gamma-irradiated rubber-clay composites based on acrylonitrile-butadiene rubber (NBR) and styrene-butadiene rubber (SBR) have been performed. The rubber-clay composites were prepared with different ratios of clay up to 50 phr using melt-mixing and hot-pressing methods. The produced sheets were exposed to gamma rays at dose levels in the range from 25 to 250 kGy. The chemical structure was studied by using FTIR technique, whereas thermal stability was tested using thermogravimetric analysis. Variations in the direct current (DC) conductivity (σ DC ) with both the clay ratio and irradiation dose were studied. The effect of the clay ratio and gamma irradiation on the dielectric constant (ε ) and loss (ε ) has also been investigated. The obtained results show that the thermal stability has been improved as a result of clay loading and gamma irradiation of the rubber samples. Moreover, a significant increase in the values of ε and ε with increasingCorrespondence to: Rasha M. Mohamed;

show abstract

Section: Thermal Stability Of Rubber-clay Compositessupporting

confidence: 91%

Electrical Properties of Irradiated Rubber‐Clay Composites Based on NBR and SBR

2012

View full text Add to dashboard Cite

show abstract

“…The diffraction pattern has a broad amorphous background superimposed on sharp crystalline peaks. Generally PP has three crystalline structure α (monoclinic), β (pseudo hexagonal) and γ (triclinic [20]. Crystallinity pattern can be inferred from the change in position of peaks, whereas crystallinity level from the intensity of the peaks.…”

Section: Wide Angle X-ray Diffraction (Waxd)mentioning

confidence: 99%

Studies on the influence of structurally different peroxides in polypropylene/ethylene alpha olefin thermoplastic vulcanizates (TPVs)

Babu¹,

Singha²,

Naskar³

2008

Express Polym. Lett.

View full text Add to dashboard Cite

Abstract. Novel thermoplastic vulcanizates (TPVs) based on polypropylene (PP) and new generation ethylene-octene copolymer (EOC) have been developed by dynamic vulcanization process, which involves melt-mixing and simultaneously crosslinking a rubber with a thermoplastic. In this paper technologically compatibilized blends of PP and EOC were dynamically vulcanized by coagent assisted peroxide crosslinking system. The effect of structurally different types of peroxides, namely dicumyl peroxide, di-tert butyl peroxy isopropyl benzene and tert-butyl cumyl peroxide with varying concentrations on the properties on TPVs was mainly studied. The physico-mechanical, thermal and morphological properties of these TPVs were characterized by using X-ray diffraction (XRD), differential scanning calorimeter (DSC) and scanning electron microscopy (SEM).

show abstract

“…Phenolic modified polypropylene was prepared using a Brabender Plasticorder by mixing process according to the work of George et al 31 PP (100 parts by weight) and dimethylol phenolic resin (SP-1045) (4 parts) were mixed at 180°C with a rotor speed of 60 rpm for 3 min. Stannous dichloride (SnCl 2 ) (0.8 parts) was then added and mixing was continued for 2 min.…”

Section: Preparation Of Phenolic Modified Polypropylene (Ph-pp)mentioning

confidence: 99%

Thermoplastic vulcanizates based on epoxidized natural rubber/polypropylene blends: Effect of compatibilizers and reactive blending

Nakason

Wannavilai

Kaesaman

2006

J of Applied Polymer Sci

View full text Add to dashboard Cite

Epoxidized natural rubber (ENR) was prepared using the performic epoxidation method. TPVs based on ENR/PP blends were later prepared by melt-mixing processes via dynamic vulcanization. The effects of blend ratios of ENR/PP, types of compatibilizers, and reactive blending were investigated. Phenolic modified polypropylene (Ph-PP) and graft copolymer of maleic anhydride on polypropylene molecules (PP-g-MA) were prepared and used as blend compatibilizers and reactive blending components of ENR/Ph-PP and ENR/PP-g-MA blends. It was found that the mixing torque, apparent shear stress and apparent shear viscosity increased with increasing levels of ENR. This is attributed to the higher viscosity of the pure ENR than that of the pure PP. Furthermore, there was a higher compatibilizing effect because of the chemical interaction between the polar groups in ENR and PP-g-MA or Ph-PP. Mixing torque, shear flow properties (i.e., shear stress and shear viscosity) and mechanical properties (i.e., tensile strength, elongation at break, and hardness) of the TPVs prepared by reactive blending of ENR/Ph-PP and ENR/PP-g-MA were lower than that of the samples without a compatibilizer. However, the TPVs prepared using Ph-PP and PP-g-MA as compatibilizers exhibited higher values. We observed that the TPVs prepared from ENR/PP with Ph-PP as a compatibilizer gave the highest rheological and mechanical properties, while the reactive blending of ENR/PP exhibited the lowest values. Trend of the properties corresponds to the morphology of the TPVs. That is, the TPV with Ph-PP as a blend compatibilizer showed the smallest rubber particles dispersed in the PP matrix, while the reactive blending of ENR/PP-g-MA showed the largest particles.

show abstract

Thermal and crystallisation behaviour of isotactic polypropylene/nitrile rubber blends

Cited by 146 publications

References 23 publications

Electrical Properties of Irradiated Rubber‐Clay Composites Based on NBR and SBR

Electrical Properties of Irradiated Rubber‐Clay Composites Based on NBR and SBR

Studies on the influence of structurally different peroxides in polypropylene/ethylene alpha olefin thermoplastic vulcanizates (TPVs)

Thermoplastic vulcanizates based on epoxidized natural rubber/polypropylene blends: Effect of compatibilizers and reactive blending

Contact Info

Product

Resources

About