Effect of stearic acid/organic montmorillonite on EVA/SA/OMMT nanocomposite foams by melting blending

Zhang, Duan; Ma, Jianzhong; Xue, Chao-Hua; Deng, Fuquan

doi:10.1177/0021955x14525796

Cited by 19 publications

(13 citation statements)

References 29 publications

(50 reference statements)

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“…Generally, four methods for the fabrication of the polymeric foam with CCS had been reported, which were co-blowing agent method [1][2][3], two-step depressurization method [4][5][6][7][8], polymer blending system method [9][10][11][12][13], as well as cooling and depressurization method [14]. Polystyrene (PS) foams with CCS were prepared using water and n-butane as co-blowing agents in extrusion and it was found that the CCS could be tuned by n-butane/water/silica content and die temperature [2].…”

Section: Introductionmentioning

confidence: 99%

A cooling and two-step depressurization foaming approach for the preparation of modified HDPE foam with complex cellular structure

Wang

Ding

Zhao

et al. 2017

The Journal of Supercritical Fluids

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This article reports on the fabrication of modified high-density polyethylene (HDPE) foams with complex cellular structure (CCS) using supercritical CO 2 as a physical blowing agent by a cooling and two-step depressurization method. HDPE was modified by dicumyl peroxide (DCP) and carbon nanotubes (CNTs) to improve its viscoelasticity and foaming behavior. The gel content test demonstrated that the cross-linking structure formed in the modified HDPE samples. Compared with that of neat HDPE, the viscoelasticity of modified HDPE was improved largely, which was characterized by rotational rheometer and torque rheometer. The introduction of DCP and CNTs had a slightly effect on the thermal behaviors of HDPE. The foaming properties of various HDPE samples showed that the cross-linking structure caused by DCP improved the

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Section: Introductionmentioning

confidence: 99%

A cooling and two-step depressurization foaming approach for the preparation of modified HDPE foam with complex cellular structure

Wang

Ding

Zhao

et al. 2017

The Journal of Supercritical Fluids

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“…Thus, with the dimorphism on the size between nanometric and micrometric agglomerated particles, the formation of a bimodal foam is favored. By increasing the cellulose fiber content, the probability of obtaining agglomerated particles is higher, as well as the probability of obtaining a bimodal foam . Figure shows the variation of the arrangement of the CN in the EVA foams.…”

Section: Resultsmentioning

confidence: 98%

“…However, considering the data shown in Figure , by increasing the CN content, the presence of large cells increases, and on the contour of these large cells the presence of a large amount of small cells is observed. Foams with the presence of two different groups of cells, that is, of two sizes, is discussed by Duan et al . and are defined as bimodal foams.…”

Section: Resultsmentioning

confidence: 99%

“…Most polyolefin foams are nonpolar materials, such as polyethylene and polypropylene. However, poly(ethylene‐ co ‐vinyl acetate) – EVA, is a polymer with polar and nonpolar segments, which vary according to the vinyl acetate content in the copolymer and it is a promising material for the incorporation of cellulose nanofibers. Hence, this paper investigates of the use of hydrophilic cellulose nanofibers and hydrophobic acetylated cellulose nanofibers in EVA foams.…”

Section: Introductionmentioning

confidence: 99%

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Effect of nanocellulose fibers and acetylated nanocellulose fibers on properties of poly(ethylene‐co‐vinyl acetate) foams

Zimmermann

Silva

Zattera

et al. 2017

J of Applied Polymer Sci

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Cellulose nanofibers are promising materials in the development of polymeric foams, because they act as heterogeneous nucleation sites for the growth of cells during foaming. In this research, we studied the incorporation of cellulose nanoparticles in poly(ethylene‐co‐vinyl acetate)‐EVA foams. The foams were produced with different fiber contents. We observed the effect of a chemical treatment by acetylation on the cellulose fibber, that is, we evaluated the use of hydrophilic and hydrophobic cellulose nanofibers in EVA foams. The main results indicate that with the addition of only 1% of cellulose nanofibers, cell density significantly reduces when compared with the pure EVA foams. On the other hand, by increasing the cellulose content, the agglomeration of nanofibers also increases, which results in heterogeneous cell sizes. The same phenomenon was observed in the foams produced with acetylated cellulose nanofibers, regardless of the fiber content used. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44760.

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“…TPE can be defined as a class of polymers, which combines the properties of rubbers with the processing ease of thermoplastics . Among thermoplastics, ethylene‐vinyl acetate copolymer (EVA) is a polymer which has properties intermediate to those of its two constituent homopolymers, namely, polyethylene and poly(vinyl‐acetate) . Styrene‐butadiene rubber (SBR) is a general purpose synthetic rubber that presents high filler‐loading capacity, good flex resistance, crack‐initiation resistance, and abrasion resistance .…”

Section: Introductionmentioning

confidence: 99%

The effect of curing system on the properties of the thermoplastic elastomer foams of ethylene‐vinyl acetate copolymer and styrene‐butadiene and ethylene‐propylene‐diene monomer rubbers

Abady

Movahed

2017

J of Applied Polymer Sci

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Thermoplastic elastomer (TPE) foams have important application in electrical, toys, and other industries. Several foams were prepared by ethylene‐vinyl acetate copolymer (EVA) lonely, and in combination with styrene‐butadiene and ethylene‐propylene‐diene monomer rubbers (SBR and EPDM). The effects of crosslinking and foaming agents and EVA type on density and mechanical properties of the cured foams with two curing systems, peroxide and sulfur‐peroxide with potential use in automotive applications, were studied. The results showed that proposed compounds formulations were foamed properly. The viscosity of the EVA was a key factor for the density values of the formed foams. The densities of the cured foams with peroxide system with various SBR contents were higher when compared with cured foams with sulfur‐peroxide system. With increasing foaming agent, the densities of the foams were reduced for studied curing systems. The densities of the EVA–EPDM foams were lower than those of the EVA–SBR foams in the same studied conditions. Increasing rubber in foam formulation had adverse effect on tensile properties of the foams. The existence of the talc powder in foam formulation had important role on the shape and type of the formed cells and resulted in foams with mostly closed cells. The results of this study help the automotive article designer to produce suitable TPE foam. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45357.

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Effect of stearic acid/organic montmorillonite on EVA/SA/OMMT nanocomposite foams by melting blending

Cited by 19 publications

References 29 publications

A cooling and two-step depressurization foaming approach for the preparation of modified HDPE foam with complex cellular structure

A cooling and two-step depressurization foaming approach for the preparation of modified HDPE foam with complex cellular structure

Effect of nanocellulose fibers and acetylated nanocellulose fibers on properties of poly(ethylene‐co‐vinyl acetate) foams

The effect of curing system on the properties of the thermoplastic elastomer foams of ethylene‐vinyl acetate copolymer and styrene‐butadiene and ethylene‐propylene‐diene monomer rubbers

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