Surface modification effects of core–shell rubber particles on the toughening of poly(butylene terephthalate)

Yang, Hoichang; Cho, Kilwon

doi:10.1002/app.31434

Cited by 9 publications

(3 citation statements)

References 41 publications

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“…It can be assumed that MAPE surface coated RR seems to slow down crazing propagation through uniform filler dispersion in the matrix via thick interphase around RR particles reducing the stress concentration leading to more energy dissipated during crack growth (propagation). 54,55 In a similar work, Kakroodi and Rodrigue 18 reported about 81% higher toughness of PP-glass fiber composites (from 23.1 to 41.9 J/m) by adding 15% MAPP/EPDM compound because of improved interfacial adhesion as a result of the chemical similarity between EPDM and PP (propylene blocks) and strong bonding between C = C bonds in EPDM with MAPP. Also, impact modification of natural fiber-reinforced PP composites by the direct addition of MAPP coupling agent led to partially located MAPP at the interface of TPE blend with slightly improved toughness.…”

Section: Fracture Analysismentioning

confidence: 96%

Phase morphology, mechanical, and thermal properties of fiber-reinforced thermoplastic elastomer: Effects of blend composition and compatibilization

Fazli

Rodrigue

2021

Journal of Reinforced Plastics and Composites

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In this work, recycled high density polyethylene (rHDPE) was compounded with regenerated tire rubber (RR) (35–80 wt.%) and reinforced with recycled tire textile fiber (RTF) (20 wt.%) as a first step. The materials were compounded by melt extrusion, injection molded, and characterized in terms of morphological, mechanical, physical, and thermal properties. Although, replacement of the rubber phase with RTF compensated for tensile/flexural moduli losses of rHDPE/RR/RTF blends because of the more rigid nature of fibers increasing the composites stiffness, the impact strength substantially decreased. So, a new approach is proposed for impact modification by adding a blend of maleic anhydride grafted polyethylene (MAPE)/RR (70/30) into a fiber-reinforced rubberized composite. As in this case, a more homogeneous distribution of the fillers was observed due to better compatibility between MAPE, rHDPE, and RR. The tensile properties were improved as the elongation at break increased up to 173% because of better interfacial adhesion. Impact modification of the resulting thermoplastic elastomer (TPE) composites based on rHDPE/(RR/MAPE)/RTF was successfully performed (improved toughness by 60%) via encapsulation of the rubber phase by MAPE forming a thick/soft interphase decreasing interfacial stress concentration slowing down fracture. Finally, the thermal stability of rubberized fiber-reinforced TPE also revealed the positive effect of MAPE addition on molecular entanglements and strong bonding yielding lower weight loss, while the microstructure and crystallinity degree did not significantly change up to 60 wt.% RR/MAPE (70/30).

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Section: Fracture Analysismentioning

confidence: 96%

Phase morphology, mechanical, and thermal properties of fiber-reinforced thermoplastic elastomer: Effects of blend composition and compatibilization

Fazli

Rodrigue

2021

Journal of Reinforced Plastics and Composites

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“…Poly(butylene terephthalate) (PBT) as one of the important engineering plastics possesses high mechanical strength, excellent electrical insulation, and dimensional stability, which make it widely used in the fields of automotive, electronics, and industrial parts. − However, the notched impact resistance of PBT is poor. The common method to enhance the fracture toughness of PBT is melt blending with elastomers.…”

Section: Introductionmentioning

confidence: 99%

Toughening of PBT by POE/POE-g-GMA Elastomer through Regulating Interfacial Adhesion and Toughening Mechanism

Shang

Wu²,

Shentu

et al. 2019

Ind. Eng. Chem. Res.

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Supertough poly(butylene terephthalate) (PBT) blends were prepared by melting with poly(ethyleneoctene) (POE) and glycidyl methacrylate grafted POE (POEg-GMA), and the toughening mechanism was systematically analyzed. Scanning electron microscopy (SEM) and rheological measurements identified that POE-g-GMA effectively improved the interaction between PBT and elastomer. The compatibility between phases improved gradually, while the notched impact strength increased at first and then decreased with the increase of POE-g-GMA content. The blends containing 10 wt % POE-g-GMA showed the highest impact strength, which was 18.0-fold compared to that of neat PBT. The study of the toughening mechanism indicated that a suitable compatibility was significant for obtaining supertough PBT blends because the good elastomers dispersion and suitable interfacial adhesion can be obtained simultaneously. The weak interface and the large particle size led to unstable crack propagation, while too strong interfacial adhesion prevented interface debonding and arrested matrix shear yielding. Microvoiding generated by both the debonding and internal cavitation of elastomers followed by matrix shear yielding was the main toughening mechanism in toughened PBT blends.

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“…The un-notched impact strength of PBT is high, however, it is strongly notch sensitive and gives brittle fracture [13][14][15]. It is necessary to modify PBT with other polymers and toughening modifiers to overcome its brittle behavior for diverse applications [9,[16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Morphology and properties of PBT/SEBS and PBT/SEBS-G-MAH blends

Lu¹,

Qu²

2016

AIP Conference Proceedings

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Abstract.A series of poly (butylene terephthlate) (PBT)/ styrene-ethylene/butylene-styrene (SEBS) and PBT/ (styreneethylene/butylene-styrene)-G-(Maleic anhydride) (SEBS-G-MAH) blends were prepared by melt blending method. And the morphology, mechanical properties were studied to identify the effect of SEBS or SEBS-G-MAH weight fraction on the properties of blends. SEM show that the minor phase was hardly distinguishable in the blend of PBT/SEBS-G-MAH as the result of the improvement in dispersibility, compared with PBT/SEBS blends. These results lead to the different mechanical properties between PBT/SEBS and PBT/SEBS-G-MAH blends.

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Surface modification effects of core–shell rubber particles on the toughening of poly(butylene terephthalate)

Cited by 9 publications

References 41 publications

Phase morphology, mechanical, and thermal properties of fiber-reinforced thermoplastic elastomer: Effects of blend composition and compatibilization

Phase morphology, mechanical, and thermal properties of fiber-reinforced thermoplastic elastomer: Effects of blend composition and compatibilization

Toughening of PBT by POE/POE-g-GMA Elastomer through Regulating Interfacial Adhesion and Toughening Mechanism

Morphology and properties of PBT/SEBS and PBT/SEBS-G-MAH blends

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