Effects of silica particle size on the structure and properties of polypropylene/silica composites foams

Hwang, Shyh‐Shin; Hsu, Peming P.

doi:10.1016/j.jiec.2012.12.043

Cited by 71 publications

(26 citation statements)

References 26 publications

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“…7 shows that the tensile strength of WPUTA films increases from 40.5 to 47.2 MPa with 0.25 wt% anatase TiO 2 content while it has almost no change as the TiO 2 content further increases from 0.25 to 1 wt%. The same phenomenon has been reported by Hwang for polypropylene-silica nanocomposites [29]. For WPUTR films, the tensile strength increases with the increase of rutile TiO 2 content.…”

Section: Physical Mechanical Performancesupporting

confidence: 86%

Comparative study of the effects of anatase and rutile titanium dioxide nanoparticles on the structure and properties of waterborne polyurethane

Peng

Zhang

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Section: Physical Mechanical Performancesupporting

confidence: 86%

Comparative study of the effects of anatase and rutile titanium dioxide nanoparticles on the structure and properties of waterborne polyurethane

Peng

Zhang

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…However, it has low mechanical properties and does not have any functions, which restrict its application ranges [ 1 , 2 , 3 , 4 , 5 ]. Current studies reinforce PP in order to have greater mechanical properties; reinforcing materials include rigid particles fillers, such as nanoclay [ 6 , 7 , 8 ], calcium carbonate [ 9 ], and silicon dioxide [ 10 , 11 ], as well as short fibers, such as glass fiber, carbon fiber [ 12 , 13 , 14 , 15 , 16 , 17 ], and basalt fiber [ 18 ]. In particular, short glass fiber causes PP to be the strongest mechanically.…”

Section: Introductionmentioning

confidence: 99%

Polypropylene/Short Glass Fibers Composites: Effects of Coupling Agents on Mechanical Properties, Thermal Behaviors, and Morphology

et al. 2015

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This study uses the melt compounding method to produce polypropylene (PP)/short glass fibers (SGF) composites. PP serves as matrix while SGF serves as reinforcement. Two coupling agents, maleic anhydride grafted polypropylene, (PP-g-MA) and maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-MA) are incorporated in the PP/SGF composites during the compounding process, in order to improve the interfacial adhesion and create diverse desired properties of the composites. According to the mechanical property evaluations, increasing PP-g-MA as a coupling agent provides the composites with higher tensile, flexural, and impact properties. In contrast, increasing SEBS-g-MA as a coupling agent provides the composites with decreasing tensile and flexural strengths, but also increasing impact strength. The DSC results indicate that using either PP-g-MA or SEBS-g-MA as the coupling agent increases the crystallization temperature. However, the melting temperature of PP barely changes. The spherulitic morphology results show that PP has a smaller spherulite size when it is processed with PP-g-MA or SEBS-g-MA as the coupling agent. The SEM results indicate that SGF is evenly distributed in PP matrices, but there are distinct voids between these two materials, indicating a poor interfacial adhesion. After PP-g-MA or SEBS-g-MA is incorporated, SGF can be encapsulated by PP, and the voids between them are fewer and indistinctive. This indicates that the coupling agents can effectively improve the interfacial compatibility between PP and SGF, and as a result improves the diverse properties of PP/SGF composites.

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“…In order to improve mechanical properties of PP foams, Hwang and Hsu [25] used nanosilica particle polypropylene. Physical foaming, MuCell technique, was applied in their study.…”

Section: Polypropylene-based Foamsmentioning

confidence: 99%

“…This is due to the nucleating agent efect of nanoparticles that cells nucleate at the boundary between the polymer matrix and the iller. Hwang and Hsu [25] also experienced the efect of microsilica particles and compare their efect on cell generation. They observed that at the same concentrations of particles, nanoparticles gave denser and smaller cells in size.…”

Section: Polypropylene-based Foamsmentioning

confidence: 99%

Thermoplastic Foams: Processing, Manufacturing, and Characterization

Altan¹

2018

Recent Research in Polymerization

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Polymer foams have wide application area due to their light weight, resistance to impact, high thermal insulation, and damping properties. Automotive, packing industry, electronic, aerospace, building construction, bedding, and medical applications are some of the ields that polymer foams have been used. However, depending on their cell structure-open or closed cell-polymer foams have diferent properties and diferent application areas. In this work, the most used thermoplastic foams with closed cells such as polypropylene, polyethylene, and polystyrene or polylactic acid have been focused. Their melt strength, degree of crystallinity for semi-crystalline ones, and viscosity have great importance on cell morphology. Cells in small diameter with high dense in polymer matrix are preferable. However, obtaining ine cells is not easy in each case, and it is still under investigation for some polymers. There are several ways to improve cell morphology, and one of them is addition of nanoparticle to the polymer. During foaming process, nanoparticles behave like nucleating agent that cells nucleate at the boundary between polymer and the nanoparticle. Besides, foaming agents contribute the homogenous dispersion of the nanoparticles in the polymer matrix, and this improves the properties of the polymer foams and generates multifunctional material as polymer nanocomposite foams.

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Effects of silica particle size on the structure and properties of polypropylene/silica composites foams

Cited by 71 publications

References 26 publications

Comparative study of the effects of anatase and rutile titanium dioxide nanoparticles on the structure and properties of waterborne polyurethane

Comparative study of the effects of anatase and rutile titanium dioxide nanoparticles on the structure and properties of waterborne polyurethane

Polypropylene/Short Glass Fibers Composites: Effects of Coupling Agents on Mechanical Properties, Thermal Behaviors, and Morphology

Thermoplastic Foams: Processing, Manufacturing, and Characterization

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