Studies on blends of ethylene vinyl acetate and polyacrylic rubber with reference to their shrinkability

Chowdhury, S. Ray; Das, C. K.

doi:10.1002/1097-4628(20000829)77:9<2088::aid-app27>3.0.co;2-n

Cited by 21 publications

(11 citation statements)

References 8 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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“…So the tendency of the H-T stretched sample will be more to snap back to its original state compared to R-T stretched one [26]. Thus the shrinkage in case of H-T stretched sample will be greater.…”

Section: Study Of Poly (Eva)-carboxylated Nitrile Rubber (Xnbr) Blendsmentioning

confidence: 97%

Study of Poly (Ethylene Vinyl Acetate)- Carboxylated Nitrile Rubber (XNBR) Blends with Reference to their Shrinkability

Chowdhury

Das

2002

Journal of Reinforced Plastics and Composites

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Heat shrinkability, a collective property, of the polymer is being utilised in various applications -mainly in the field of encapsulation. The elastic memory is introduced into the system in the form of an elastomeric phase. Here, the blends of ethylene vinyl acetate (EVA) and carboxylated nitrile rubber (XNBR) were studied with reference to their shrinkability. It was found that with increasing cure time shrinkability was decreased. On the other hand, with increasing elastomer content, the shrinkage was increased up to a certain level and beyond this shrinkability was decreased. Temperature has a profound effect on the shrinkability. High temperature (H-T) stretched samples showed higher shrinkage than room temperature (R-T) stretched one. Generally, the crystallinity of high temperature (H-T) stretched sample was higher than that of room temperature (R-T) stretched sample, which was again higher than that of original unstretched sample, for a particular blend. At room temperature (R-T), stretching nucleation is favoured but at high temperature (R-T) stretching crystal growth is favoured. From SEM, it was seen that elastomer phase in H-T stretched sample was more elongated than that in R-T stretched one and in shrunk sample elastomer phase was more spherulitic than that of the original unstretched one.

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“…Recoiling is controlled by comparatively highly oriented amorphous materials as well as memory points. [4,12] The higher the elastomer content, the higher is the amorphous phase, consequently the amount of oriented amorphous material will be more on stretching, hence the tendency of the extended state to revert to a randomly coiled conformation will be higher, thus increasing shrinkage. In addition, with an increase of elastomer (EPH) the active functional group increases.…”

Section: Effect Of Cure Time and Elastomer Content On Shrinkage Of Thmentioning

confidence: 99%

“…[12] All the above factors have been considered in studying the shrinkability of the blend in this case. The effect of additive flame retardants on shrinkability has also been considered here.…”

Section: Introductionmentioning

confidence: 99%

Study of Heat Shrinkability and Flame Retardancy of Poly(ethylene vinyl acetate)/Epichlorohydrin Blends

Chowdhury

Mishra

Das³

2001

Macromol. Mater. Eng.

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Studies on blends of ethylene vinyl acetate and polyacrylic rubber with reference to their shrinkability

Cited by 21 publications

References 8 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.

Study of Poly (Ethylene Vinyl Acetate)- Carboxylated Nitrile Rubber (XNBR) Blends with Reference to their Shrinkability

Study of Heat Shrinkability and Flame Retardancy of Poly(ethylene vinyl acetate)/Epichlorohydrin Blends

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