A novel thermoplastic elastomer based on dynamically vulcanized polypropylene/acrylic rubber blends

Soares, Bluma G.; Santos, Daniela Micheline dos; Sirqueira, Alex da Silva

doi:10.3144/expresspolymlett.2008.72

Cited by 32 publications

(36 citation statements)

References 23 publications

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“…The best way to achieve commercially viable products with outstanding properties is through the addition of filler and/or blending with other thermoplastic or rubber. Several researchers have reported the use of ACM rubbers in blends with some thermoplastic as nylon [2][3][4][5] , poly (vinyl chloride) [6][7] , ethylene -vinyl acetate (EVA) copolymers [8] , poly(vinylidene fluoride) (PVDF) [9] , poly (ethylene terephthalate) [10] , chlorinated polypropylene [11] and polypropylene [12] , as well as with few rubbers as fluorocarbon rubber [13][14][15][16][17] and natural rubber [18][19][20] . Recently we have reported some results involving mechanical and dynamic mechanical properties of ACM/NBR blends aiming to develop a system with better heat and oil resistance than pure NBR elastomer and better mechanical performance than ACM [21] .…”

Section: Introductionmentioning

confidence: 99%

Compatibilization efficiency of carboxylated nitrile rubber and epoxy pre-polymer in nitrile/acrylic rubber blends.

Celestin¹,

Soares²

2013

Polímeros

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An investigation has been made of the effects from a compatibilizer, viz. carboxylated nitrile rubber (XNBR), on several properties of nitrile rubber (NBR) and acrylic rubber (ACM) blends, including curing characteristics, mechanical, dynamic mechanical and dielectric properties. The presence of XNBR until 10 phr resulted in an improvement of the ultimate tensile properties, especially elongation at break. The mechanical properties associated to the volume fraction of rubber in the network (Vr) and torque values suggest the co-vulcanization phenomenon imparted by the compatibilization. The oil resistance of NBR/ACM (50:50 wt. (%)) blends (compatibilized and non compatibilized) was similar to that observed for pure ACM and significantly higher than NBR. The addition of small amounts of epoxy pre-polymer in combination with XNBR resulted in an additional improvement of the tensile properties. The dynamic mechanical and dielectric properties of the blends were also investigated. The loss modulus values of the compatibilized blends were significantly lower indicating an increase of the elastic characteristics. All blends presented two dielectric relaxation peaks confirming the heterogeneity of the compatibilized blends.

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Section: Introductionmentioning

confidence: 99%

Compatibilization efficiency of carboxylated nitrile rubber and epoxy pre-polymer in nitrile/acrylic rubber blends.

Celestin¹,

Soares²

2013

Polímeros

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“…With the addition of compatibilizer will increase the Temperature melting (Tm), and enthalpy of the PP melting. This indicates that the macro chain compatibilization limit movement of molecules due to the interaction between the phases that produce high enough Temperature melting [18]. In the amorphous portion of PP, where the glass transition temperature (Tg) can not be detected by DSC, because DSC is only sensitive to the scope of the molecules motion larger than the micro-Brownian motion which causes the loss of dynamic peaks [19].…”

Section: Resultsmentioning

confidence: 99%

THE EFFECT OF SIZE AND CRUMB RUBBER COMPOSITION AS A FILLER WITH COMPATIBILIZER PP-g-MA IN POLYPROPYLENE BLENDS AND SIR-20 COMPOUND ON MECHANICAL AND THERMAL PROPERTIES

Frida¹

2013

MST

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Having been researched the development of thermoplastic elastomer material of polypropylene and natural rubber SIR-20 compound with Crumb Rubber as the filler. Reinforced polypropylene with size 60 mesh with 1 mm, and the composition of the Crumb rubber (30, 40, and 50) wt%. Observed mechanical properties are tensile strength, fracture elongation, Young's modulus, tear strength and impact strength. Thermal properties are analyzed by DSC and DTA/TGA. It is acquired that for the size of 60 mesh crumb rubber tensile strength, fracture elongation, Young's modulus, tear strength and impact strength are bigger than 1mm size. The addition of 60 mesh crumb rubber increases but it decreases by adding of 50 weight%. While for crumb rubber 1 mm tensile strength, fracture elongation, tear strength and impact strength decreas. Based on analysis of DSC that the addition of crumb rubber does not make a difference boiling point significantly between samples containing crumb rubber and polypropylene Analysis TGA/DTA to an increase in enthalpy and decomposition temperature with the addition of crumb rubber used and thermal stability. AbstrakPengaruh Ukuran dan Komposisi Serbuk Ban Bekas sebagai Filler dengan Kompatibeliser PP-g-MA pada Campuran Polipropilena dan Kompon SIR-20 terhadap Sifat Mekanik dan Termal. Telah diteliti pengembangan bahan termoplastik elastomer dari polipropilena dan kompon karet alam SIR-20 dengan serbuk ban bekas sebagai bahan pengisi. Polipropilena yang diperkuat dengan serbuk ban bekas dengan ukuran 60 mesh 1 mm, dan komposisi serbuk ban bekas (30, 40, dan 50) %berat. Sifat mekanik yang diamati adalah kekuatan tarik,perpanjangan putus, Modulus Young, kekuatan sobek, dan kekuatan impact. Sifat termal dianalisis dengan DSC dan DTA/TGA.Dari hasil penelitian diperoleh bahwa untuk ukuran serbuk ban bekas 60 mesh kekuatan tarik, perpanjangan putus, modulus Young, kekuatan sobek, dan kekuatan impact lebih besar dibanding ukuran 1 mm. Penambahan serbuk ban bekas 60 mesh mengalami peningkatan namun mengalami penurunan pada penambahan 50 % berat. Sedangkan untuk ukuran serbuk ban bekas 1 mm kekuatan tarik, perpanjangan putus, kekuatan sobek, dan kekuatan impact mengalami penurunan. Dari analisis DSC diperoleh bahwa dengan penambahan serbuk ban bekas tidak menghasilkan perbedaan titik didih yang signifikan antara sampel yang mengandung serbuk ban bekas dan polipropilena. analisis TGA/DTA adanya peningkatan enthalpy dan suhu dekomposisi dengan adanya penambahan serbuk ban bekas dan terjadi stabilitas termal.

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“…Remaining all other zones excluding the feeding zone was set at 150°C; whereas, the initial set temperature for the feeding zone was set at 130°C. The resulting pellets thus obtained were reprocessed in the Brabender internal mixer and subsequently their properties were measured with the moulded specimens to ensure the reprocessability.…”

Section: Methodsmentioning

confidence: 99%

Meticulous analysis and consequences of microstructure changes on melt rheology and dynamic viscoelasticity of thermoplastic vulcanizates upon reprocessing

Dey

Naskar

Nando

et al. 2014

J of Applied Polymer Sci

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Thermoplastic vulcanizates (TPVs), which are a special class of elastomer alloy, prepared by dynamic vulcanization possess unique morphology of finely dispersed micron-size cross-linked elastomeric particles in a continuous thermoplastic matrix. The present study investigates the microstructure formation of elastomeric phase and its associated morphological changes during reprocessing of TPVs based on poly[styrene-b-(ethylene-co-butylene)-b-styrene] triblock co-polymer (S-EB-S) and solution polymerized styrene butadiene elastomer (S-SBR) by scanning electron microscopy and atomic force microscopy. Semi-efficient and efficient sulfur-based curing systems have been adopted to cure the elastomeric phase and a comparative study has been made to demonstrate and explain the effect of reprocessing on the melt rheology and dynamic viscoelasticity of the TPVs. The present work also provides a better insight and guidance to control the microstructure of the cross-linked elastomeric phase to prepare selectively co-continuous or dispersed phase morphology.

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A novel thermoplastic elastomer based on dynamically vulcanized polypropylene/acrylic rubber blends

Cited by 32 publications

References 23 publications

Compatibilization efficiency of carboxylated nitrile rubber and epoxy pre-polymer in nitrile/acrylic rubber blends.

Compatibilization efficiency of carboxylated nitrile rubber and epoxy pre-polymer in nitrile/acrylic rubber blends.

THE EFFECT OF SIZE AND CRUMB RUBBER COMPOSITION AS A FILLER WITH COMPATIBILIZER PP-g-MA IN POLYPROPYLENE BLENDS AND SIR-20 COMPOUND ON MECHANICAL AND THERMAL PROPERTIES

Meticulous analysis and consequences of microstructure changes on melt rheology and dynamic viscoelasticity of thermoplastic vulcanizates upon reprocessing

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