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Nair, S. V.; Wong, S. C.; Goettler, Lloyd A.

doi:10.1023/a:1018618912039

Cited by 49 publications

(23 citation statements)

References 21 publications

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“…When in such composites, an ABS rubber was added, a positive effect was mentioned but only in the case that the polymer/fiber interface was very strong. 16,17 However, from a recent study in PA-6 it was found that even when small amounts of glass fibers (<5 wt%) were used in combination with EPR-g-MA copolymer, a significant reduction of about 50% occurred in impact strength compared with similar PA-6/EPRg-MA blends. 18 As a conclusion, it can be said that the stabilization of impact strength in our blend containing 12.5 wt% SEBS-g-MA, can be attributed to the presence of glass fibers and it is not possible to produce supper-tough materials as in the case that rubber is added alone.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Rubber toughening of glass fiber reinforced nylon‐6,6 with functionalized block copolymer SEBS‐g‐MA

et al. 2002

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ABSTRACT:The toughening of glass fiber reinforced nylon-6,6 (PA-6,6) by using the functionalized triblock copolymer styrene-(ethylene-co-butylene)-styrene, grafted with maleic anhydride (SEBS-g-MA) was examined. Blends containing 2.5, 5, 7.5, 10, and 12.5 wt% copolymer were prepared by melt blending in a single-screw extruder. Emphasis was given to the study of mechanical properties in comparison with morphology and thermal properties of the aforementioned samples. Although the amount of SEBS-g-MA that was added in PA-6,6 was not enough to produce a super-tough material, a significant increase in the resistance to crack propagation and impact strength was observed in all blends. This behavior was proportional to the amount of SEBS-g-MA that was added for samples having up to 10%, rubber, while additional amounts seem to have no further effect. A small decrease in tensile strength was also observed. From FTIR spectroscopy and DSC analysis it was shown that the grafting extent of SEBS-g-MA to PA-6,6 was very low.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Rubber toughening of glass fiber reinforced nylon‐6,6 with functionalized block copolymer SEBS‐g‐MA

et al. 2002

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“…Nair et al 6,7 studied the fracture resistance of glassfiber-reinforced polyamide-6,6/ABS hybrids. They reported that the glass fibers promoted shear yielding of the matrix, thereby enhancing the fracture initiation and propagation resistance of the polyblends.…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance characteristics of short‐glass‐fiber/maleated styrene–ethylene–butylene–styrene/polypropylene hybrid composites

Tjong

et al. 2002

J of Applied Polymer Sci

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Eighty/twenty polypropylene (PP)/styreneethylene-butylene-styrene (SEBS) and 80/20 PP/maleated styrene-ethylene-butylene-styrene (SEBS-g-MA) blends reinforced with 30 wt % short glass fibers (SGFs) were prepared by extrusion and subsequent injection molding. The influence of the maleic anhydride (MA) functional group grafted to SEBS on the properties of SGF/SEBS/PP hybrid composites was studied. Tensile and impact tests showed that the SEBS-g-MA copolymer improved the yield strength and impact toughness of the hybrid composites. Extensive plastic deformation occurred at the matrix interface layer next to the fibers of the SGF/SEBS-g-MA/PP composites during impact testing. This was attributed to the MA functional group, which enhanced the adhesion between SEBS and SGF. Differential scanning calorimetry measurements indicated that SEBS promoted the crystallization of PP spherulites by acting as active nucleation sites. However, the MA functional group grafted to SEBS retarded the crystallization of PP. Finally, polarized optical microscopy observations confirmed the absence of transcrystallinity at the glass-fiber surfaces of both SGF/SEBS/PP and SGF/SEBS-g-MA/PP hybrid composites.

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“…behavior exhibited by the hybrid composite is clearly more desired than neat nylon 6,6, which does not yield any R-curve in crack propagation [13]. The significant crack propagation toughness reinforces the notion that unique benefits can be obtained with the design for hybrid composites.…”

Section: Fracture Propertiesmentioning

confidence: 58%

“…Tearing modulus calculated using equation (3) is indicative of partial propagation component of toughness [13]. behavior exhibited by the hybrid composite is clearly more desired than neat nylon 6,6, which does not yield any R-curve in crack propagation [13].…”

Section: Fracture Propertiesmentioning

confidence: 99%

Fracture behavior of nylon hybrid composites

Pisharath¹,

Wong²,

Hu³

2004

Journal of Materials Science

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SynopsisHybrid composite systems consisting of liquid crystalline polymer (LCP), short glass fibers and toughened nylon in varied ratios were studied. Dynamic mechanical results indicated that, elastomeric phase in toughened nylon 6,6 promoted a better compatibilization between nylon 6,6 and LCP in a hybrid system containing short glass fibers in comparison with one without glass fibers. Improved compatibility facilitated fibrillation of LCP phase in the skin region of the hybrid composite, thereby providing superior tensile strength. Without the presence of LCP, glass fiber reinforced toughened nylon 6,6 exhibited the least tensile strength. J-integral analysis and essential work of fracture (EWF) method were used to compare the fracture behavior of composites. Results showed that specific essential work of fracture were consistent with the critical J-integral. Matrices reinforced by LCP alone showed the * Corresponding author. Fax: 701-231-8913. E-mail address: josh.wong@ndsu.nodak.edu (Shing-Chung Wong) 2 best crack initiation and propagation toughnesses, followed by glass fiber reinforced and hybrid composites. The better compatibility between nylon 6,6 and LCP appeared to inhibit the interfacial debonding process, resulting in brittle fracture.

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Cited by 49 publications

References 21 publications

Rubber toughening of glass fiber reinforced nylon‐6,6 with functionalized block copolymer SEBS‐g‐MA

Rubber toughening of glass fiber reinforced nylon‐6,6 with functionalized block copolymer SEBS‐g‐MA

Preparation and performance characteristics of short‐glass‐fiber/maleated styrene–ethylene–butylene–styrene/polypropylene hybrid composites

Fracture behavior of nylon hybrid composites

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