Properties of chlorinated polyethylene rubber/ethylene vinyl acetate copolymer blend‐based foam

Zhang, Bao Sheng; Zhang, Zhen Xiu; Lv, Xiu Feng; Lu, Bing; Xin, Zhen Xiang

doi:10.1002/pen.22071

Cited by 26 publications

(7 citation statements)

References 12 publications

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“…Moreover, the presence of both nonpolar groups (unmodified methylene units) and polar groups (chlorinated methylene co -units) in the CPE’s backbone increase its compatibility to blend with either polar or nonpolar polymers for a specific sets of properties and cost advantages purposes [ 127 ]. Zhang and coworkers prepared a series of foams to investigate the effect of CPE/EVA ratio on the curing, foaming and mechanical properties [ 128 ]. They found that increasing the EVA content had a negligible effect on the scorch and curing time, but higher hardness with lower rebound resilience and shrinkage ratio were obtained.…”

Section: Rubber Foaming Formulationmentioning

confidence: 99%

Chemistry, Processing, Properties, and Applications of Rubber Foams

Rostami‐Tapeh‐Esmaeil

Vahidifar

Esmizadeh

et al. 2021

Polymers

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With the ever-increasing development in science and technology, as well as social awareness, more requirements are imposed on the production and property of all materials, especially polymeric foams. In particular, rubber foams, compared to thermoplastic foams in general, have higher flexibility, resistance to abrasion, energy absorption capabilities, strength-to-weight ratio and tensile strength leading to their widespread use in several applications such as thermal insulation, energy absorption, pressure sensors, absorbents, etc. To control the rubber foams microstructure leading to excellent physical and mechanical properties, two types of parameters play important roles. The first category is related to formulation including the rubber (type and grade), as well as the type and content of accelerators, fillers, and foaming agents. The second category is associated to processing parameters such as the processing method (injection, extrusion, compression, etc.), as well as different conditions related to foaming (temperature, pressure and number of stage) and curing (temperature, time and precuring time). This review presents the different parameters involved and discusses their effect on the morphological, physical, and mechanical properties of rubber foams. Although several studies have been published on rubber foams, very few papers reviewed the subject and compared the results available. In this review, the most recent works on rubber foams have been collected to provide a general overview on different types of rubber foams from their preparation to their final application. Detailed information on formulation, curing and foaming chemistry, production methods, morphology, properties, and applications is presented and discussed.

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Section: Rubber Foaming Formulationmentioning

confidence: 99%

Chemistry, Processing, Properties, and Applications of Rubber Foams

Rostami‐Tapeh‐Esmaeil

Vahidifar

Esmizadeh

et al. 2021

Polymers

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“…For EVA copolymer as a thermoplastic matrix, the crosslinking of polymer chains is the best way to increase the melt strength. Therefore, in this study the crosslinking and foaming process of solid nanocomposites were completed in two separate steps, different from other investigations [35][36][37]. First, the chemical crosslinking of EVA copolymer macromolecules was carried out in the compression molding process.…”

Section: Effects Of Eva Crosslinkingmentioning

confidence: 99%

Assisted heterogeneous multinucleation and bubble growth in semicrystalline ethylene-vinyl acetate copolymer/expanded graphite nanocomposite foams: Control of morphology and viscoelastic properties

Yousefzade¹,

Hemmati²,

Garmabi³

et al. 2015

Express Polym. Lett.

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Abstract. Nanocomposite foams of ethylene-vinyl acetate copolymer (EVA) reinforced by expanded graphite (EG) were prepared using supercritical nitrogen in batch foaming process. Effects of EG particle size, crosslinking of EVA chains and foaming temperature on the cell morphology and foam viscoelastic properties were investigated. EG sheet surface interestingly provide multiple heterogeneous nucleation sites for bubbles. This role is considerably intensified by incorporating lower loadings of EG with higher aspect ratio. The amorphous and non-crosslinked domains of EVA matrix constitute denser bubble areas. Higher void fraction and more uniform cell structure is achieved for non-crosslinked EVA/EG nanocomposites foamed at higher temperatures. With regard to the structural variation, the void fraction of foam samples decreases with increasing the EG content. Storage and loss moduli were analyzed to study the viscoelastic properties of nanocomposite foams. Surprisingly, the foaming process of EVA results in a drastic reduction in loss and storage moduli regardless of whether the thermoplastic matrix contains EG nanofiller or not. For the EVA/EG foams with the same composition, the nanocomposite having higher void fraction shows relatively lower loss modulus and more restricted molecular movements. The study findings have verified that the dynamics of polymer chains varies after foaming EVA matrix in the presence of EG.

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“…In a similar work, blends of CPE25 and CPE48 with epoxidized natural rubber were found to be miscible at higher degree of chlorination owing to the interactions involving chlorine atoms and oxirane groups . Similarly, CPE blends with other polymer matrices have also been reported . Although incorporation of CPE has already been achieved in many polymer blends but in‐depth morphological and rheological studies on the miscibility, structural properties and performance of blends of different types of CPE with polyolefins like polyethylene (PE) and polypropylene (PP) is still missing.…”

Section: Introductionmentioning

confidence: 88%

Blends of high-density polyethylene with chlorinated polyethylene: Morphology, thermal, rheological, and mechanical properties

Chaudhry¹,

Mittal²

2013

Polym Eng Sci

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Blends of high-density polyethylene (HDPE) with chlorinated polyethylene (CPE) were generated using melt mixing. CPE of two different chlorination contents was used and its amount in the blends was varied from 1% till 30%. The rheological, thermal, mechanical, and morphological properties of the blends were characterized along with miscibility analysis. In general, better mixing of the CPE polymer in HDPE was observed at lower CPE concentration and reduced mixing or immiscibility occurred at higher concentration of CPE. However, the extent of immiscibility was different in both CPE25 and CPE35 systems. The rheological analysis of the data using Cole-Cole, Han-Chuang and van Gurp plots confirmed the miscibility of CPE25 blends (except for 30% CPE25 blend at lower frequency) whereas CPE35 blends with 10-30% CPE content were immiscible. Highest increase in the rheological properties (complex moduli) was observed at 2% CPE content. The mechanical properties of the CPE25 blends were superior than the corresponding CPE35 blends especially at higher CPE concentration where effects of immiscibility as well as matrix plasticization played a role. The morphology characterization using TEM indicated change in the crystalline features of the polymer in the case of CPE35 blends. The optical microscopy also confirmed the better mixing of CPE25 polymers in HDPE than CPE35. The CPE25 blends exhibited uniformly dispersed CPE phase which was also confirmed by the rheological analysis. However, the blends of CPE35 with 10% CPE content onwards had significant phase immiscibility. POLYM. ENG. SCI., 54:85-95, 2014. 10% CPE35, (m) 15% CPE35, (n) 20% CPE35, and (o) 30% CPE35 blends. The width of the images reads 500 lm. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.] FIG. 10. Transmission electron micrographs of (a) 5% CPE25 blend, (b) 5% CPE35 blend, and (c) pure HDPE.

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Properties of chlorinated polyethylene rubber/ethylene vinyl acetate copolymer blend‐based foam

Cited by 26 publications

References 12 publications

Chemistry, Processing, Properties, and Applications of Rubber Foams

Chemistry, Processing, Properties, and Applications of Rubber Foams

Assisted heterogeneous multinucleation and bubble growth in semicrystalline ethylene-vinyl acetate copolymer/expanded graphite nanocomposite foams: Control of morphology and viscoelastic properties

Blends of high-density polyethylene with chlorinated polyethylene: Morphology, thermal, rheological, and mechanical properties

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