Effect of compatibilizer and silane coupling agent on physical properties of ethylene vinyl acetate copolymer/ethylene‐1‐butene copolymer/clay nanocomposite foams

Kim, Dongwoo; Park, Keun-Wan; Chowdhury, Subhendu Ray; Kim, Gue‐Hyun

doi:10.1002/app.24677

Cited by 25 publications

(14 citation statements)

References 17 publications

(13 reference statements)

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“…Generally, the nature of solid phase, cell structure, and density largely governs the mechanical properties of the polymeric foams . Because of the difference in foam density of EVA/NR blends with different fillers and their amounts, the tensile strength of the EVA/NR/Na‐MMT, EVA/NR/organoclay, and EVA/NR/(china clay) foams were normalized by their corresponding density and the results are plotted against filler content, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

The role of nanofillers on (natural rubber)/(ethylene vinyl acetate)/clay nanocomposite in blending and foaming

Lopattananon

Julyanon

Masa

et al. 2014

Vinyl Additive Technology

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Nanocomposite foams were fabricated from 60/40 wt% ethylene vinyl acetate (EVA)/natural rubber (NR) blends by using azodicarbonamide as a blowing agent. Two different nanofillers (sodium montmorillonite and organoclay) were employed to study their effects on foam properties. The results were also compared with conventional (china clay)‐filled foams. Transmission electron microscopy, X‐ray diffraction, scanning electron microscopy, and three‐dimensional Microfocus X‐ray computed tomography scanning analysis were performed to characterize the EVA/NR blend morphology and foam structures. The results revealed that the nanofiller acted as a blend compatibilizer. Sodium montmorillonite was more effective in compatibilization, generating better phase‐separated EVA/NR blend morphology and improving foam structure. Higher filler loading increased the specific tensile strength of rubber foams. The rubber nanocomposite foam showed superior specific tensile strength to the conventional rubber composite foam. The elastic recovery and compressive strength of the nanocomposite foams decreased with increasing filler content, whereas the opposite trend was observed for the conventional composite foams with china clay. The thermal conductivity measurement indicated that the nanofiller had better beneficial effect on thermal insulation over china clay filler. From the present study, the nanofillers played an important role in obtaining better blend morphology as compatibilizer, rather than the nucleating agent and the nanofiller content of 5 phr (parts by weight per hundred parts of rubber) was recommended for the production of EVA/NR nanocomposite foams. J. VINYL ADDIT. TECHNOL., 21:134–146, 2015. © 2014 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

The role of nanofillers on (natural rubber)/(ethylene vinyl acetate)/clay nanocomposite in blending and foaming

Lopattananon

Julyanon

Masa

et al. 2014

Vinyl Additive Technology

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“…A variety of different magnitude of epoxidation (5,10,30, and 50 mol%) of BR were conducted using modified protocol (Scheme 1) [27].…”

Section: Synthesis Of Epoxidized Polybutadiene Rubber (Ebr)mentioning

confidence: 99%

“…However, such challenges can be resolved up to greater extent using compatibilizers or coupling agents which reduces the difference in polar characters of fillers and rubbers and leads to improved rubber-filler interactions [10,11]. Typically, on industrial scale, the modification of silica surface is done by introduction of coupling agents or compatibilizers like silanes, which reduce the filler-filler interaction and also enhance the rubber-filler interaction through chemical linkages between the silica surface and rubber chains [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…• epoxidation of tire-grade high cis-polybutadiene rubber (5,10,30, and 50 mol% epoxidation) to prepare the epoxidized polybutadiene rubber (EBR); • evaluation of compatibilizing efficacy of thus synthesized EBR in silica-filled SBR/BR blend at various epoxidation levels and loadings; • comparative study of EBR as a compatibilizer with commercially used silanes like bis(triethoxy-silylpropyl) tetrasulphide (TESPT) and 3-amino propyl trimethoxy silane (APS).…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and utilization of epoxidized polybutadiene rubber as an alternate compatibilizer in green-tire composites

et al. 2017

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In the present study, epoxidized polybutadiene rubber (EBR) was synthesized from commercial-grade cispolybutadiene rubber (BR) and was characterized by NMR, FTIR, differential scanning calorimetry, thermogravimetric analysis and surface energy by contact angle measurement. To circumvent the drawback of the existing compatibilizers, the EBR was successfully used as an alternate compatibilizer for a silica-based 'green-tire' composite. The significant rise of surface energy was observed after epoxidation of BR, which represents the enhancement of the polar character of the rubber chains and eventually leads to improved compatibility between silica fillers and rubber chains. Out of various epoxidation levels, EBR with 30 mol% epoxidation showed the best compatibilizing effect. The optimum loading of EBR was found to be 12% with respect to total silica content. Apart from using EBR alone as a compatibilizer, combination of EBR with commercial silane-coupling agents, namely, bis(triethoxy-silylpropyl) tetrasulphide (TESPT) and 3-aminopropyltrimethoxy silane, was also investigated. The physico-mechanical and dynamic properties of the compounds with a combination of were comparable with those of the compound prepared using TESPT compatibilizer. The results observed with EBR-compatibilized samples revealed that EBR has a potential to be an effective compatibilizer which eventually could minimize the drawbacks associated while using commercial silane as a compatibilizer at the industrial scale.

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“…The system can be either polymer blend plus filler or a hybrid of a filler with polymer matrix. For example, Kim et al created (ethylene‐vinyl acetate copolymer)/(ethylene‐1‐butene copolymer)/clay composite foams with lower densities without sacrificing the mechanical properties. In addition, Spiridon et al studied the enzymatic degradation of PVA/starch/montmorillonite.…”

Section: Introductionmentioning

confidence: 99%

Effects of halloysite nanotubes and kaolin loading on the tensile, swelling, and oxidative degradation properties of poly(vinyl alcohol)/chitosan blends

Ismail

Khoo

Ariffin

2013

Vinyl Additive Technology

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[Halloysite nanotubes (HNT)]‐filled and kaolin filled composite films based on poly(vinyl alcohol) (PVA)/chitosan (CS) blend were prepared via solution casting method. Tensile properties, fracture morphology, FTIR spectra, thermal stability, swelling properties, moisture absorption, and oxidative degradation of the composite films were investigated. Addition of 0.5 wt% of filler led to the optimum tensile properties of the films. Increased roughness and tearing in the fracture surface morphology supported the tensile results. The FTIR results indicated there were physical interactions present in the composite films. Thermal stability of the composite films differed slightly where PVA/CS/HNT composite films showed better thermal stability than PVA/CS/kaolin composite films. Moreover, the presence of HNT and kaolin fillers in the blend reduced the swelling and moisture absorption properties of the films. Finally, the composite films were degraded by using Fenton's reagent. Degradation percentage of the composite films decreased with increasing filler loading. J. VINYL ADDIT. TECHNOL., 19:55–64, 2013. © 2013 Society of Plastics Engineers

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Effect of compatibilizer and silane coupling agent on physical properties of ethylene vinyl acetate copolymer/ethylene‐1‐butene copolymer/clay nanocomposite foams

Cited by 25 publications

References 17 publications

The role of nanofillers on (natural rubber)/(ethylene vinyl acetate)/clay nanocomposite in blending and foaming

The role of nanofillers on (natural rubber)/(ethylene vinyl acetate)/clay nanocomposite in blending and foaming

Synthesis and utilization of epoxidized polybutadiene rubber as an alternate compatibilizer in green-tire composites

Effects of halloysite nanotubes and kaolin loading on the tensile, swelling, and oxidative degradation properties of poly(vinyl alcohol)/chitosan blends

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