Effect of clay and compatibilizer on the mechanical/thermal properties of microcellular injection molded low density polyethylene nanocomposites

Hwang, Shyh‐Shin; Hsu, Peming P.; Yeh, Jui‐Ming; Yang, Jui-pin; Chang, Kung‐Chin; Lai, Ying-zhong

doi:10.1016/j.icheatmasstransfer.2009.02.005

Cited by 43 publications

(36 citation statements)

References 12 publications

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“…Organoclay–polyethylene nanocomposites prepared by melt compounding have been of interest. 4–15 Wang et al 8 produced maleated polyethylene/clay nanocomposites and indicated that the hydrophobicity of the organically modified clay and the hydrophilicity of maleated polyethylene are important factors to obtain exfoliated and homogeneously dispersed clay nanocomposites. Zhang et al 9 studied flammability properties of polyethylene–clay nanocomposites and found that there is considerable reduction in the peak release rate in the nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of low density polyethylene/ethylene methyl acrylate glycidyl methacrylate/organoclay nanocomposites

Coskunses

Yilmazer

2011

J of Applied Polymer Sci

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The effects of organoclay type, compatibilizer, and the addition order of components during meltblending process on the morphology and thermal, mechanical, and flow properties of ternary nanocomposites based on low-density polyethylene (LDPE) were investigated. As a compatibilizer, ethylene/methyl acrylate/glycidyl methacrylate (E-MA-GMA), as organoclays Cloisites V R 15A, 25A, and 30B were used. All samples were prepared by a corotating twin screw extruder, followed by injection molding. The highest increase of the basal spacing for ternary nanocomposites was obtained in LDPE/E-MA-GMA/ Cloisite V R 30B nanocomposites with interlayer spacing of 59.2 Å . Organoclay and compatibilizer addition did not influence the melting/crystallization behavior of the compositions, and both compatibilizer and organoclays had no significant nucleation activity in LDPE. Among the ternary nanocomposites, the maximum increase in tensile strength and tensile modulus values was observed for nanocomposites containing organoclay Cloisite V R 15A. The improvement with respect to neat LDPE was 43% for tensile strength and 44% for tensile modulus. According to the mechanical analysis, the best sequence of component addition was the one in which LDPE, organoclay, and compatibilizer were simultaneously fed to the extruder in the first run, and the product of the first run was extruded once more.

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of low density polyethylene/ethylene methyl acrylate glycidyl methacrylate/organoclay nanocomposites

Coskunses

Yilmazer

2011

J of Applied Polymer Sci

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“…Clay, such as montmorillonite (MMT), is mixed with polymers and the mechanical strength of the polymers increase [36,38]. In the study of Hwang et al [38], the efect of MMT on the cell morphology of the low density of polyethylene (LDPE) was observed.…”

Section: Polyethylene-based Foamsmentioning

confidence: 99%

“…In the study of Hwang et al [38], the efect of MMT on the cell morphology of the low density of polyethylene (LDPE) was observed. First of all, the researchers enhanced the nanoparticle distribution in the polymer matrix by grafting polar maleic anhydride (MA) onto nonpolar LDPE.…”

Section: Polyethylene-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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“…[44] In EPDM/clay foamed nanocomposites modified by maleic anhydride, an increase in mechanical and dynamic mechanical properties, as well as in non-isothermal crystallization rate, has been observed [55].…”

Section: Expanded Polyolefin-based Foamsmentioning

confidence: 99%