Preparation of polystyrene/clay nanocomposite by suspension and emulsion polymerization

Yang, Wei-Ta; Ko, T. T.; Wang, Shuchun; Shih, Ping-I; Chang, Min; Jiang, George J.

doi:10.1002/pc.20412

Cited by 17 publications

(6 citation statements)

References 20 publications

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“…By increasing clay loading, the temperature at which degradation of nanocomposites takes place rises. The degradation temperature is increased by adding nanoclay content because clay platelets can retard heat transfer in the matrix and also strengthen the polymer chains to avoid heat degradation [45] . Additionally, the hindrance effect of nanoplatelets on the polymer chains motion, interaction between clay platelets and polymer matrix, and restriction of oxygen permeation by silicate sheets, are other reasonable explanations for increasing the degradation temperature of the nanocomposites [11,46,47] .…”

Section: Psmentioning

confidence: 99%

Polystyrene–organoclay nanocomposites produced by in situ activators regenerated by electron transfer for atom transfer radical polymerization

Khezri

Haddadi‐Asl

Roghani‐Mamaqani

et al. 2012

Journal of Polymer Engineering

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Polystyrene -organoclay nanocomposites produced by in situ activators regenerated by electron transfer for atom transfer radical polymerization Abstract: A newly developed initiation system, activators regenerated by electron transfer (ARGET), was employed to synthesize polystyrene-organoclay nanocomposites via atom transfer radical polymerization (ATRP). ARGET ATRP was applied since it is carried out at significantly low concentrations of the catalyst and environmentally acceptable reducing agents. Conversion and molecular weight evaluations were performed using gravimetry and size exclusion chromato graphy (SEC), respectively. According to the findings, addition of clay content resulted in a decrease in conversion and molecular weight of nanocomposites. However, an increase of polydispersity index is observed by increasing nanoclay loading. The living nature of the polymerization is revealed by 1 H NMR spectroscopy and extracted data from the SEC traces. X-ray diffraction (XRD) analysis shows that organoclay layers are disordered and delaminated in the polymer matrix and exfoliated morphology is obtained. Thermogravimetric analysis (TGA) shows that thermal stability of the nanocomposites is higher than the neat polystyrene. A decrease in glass transition temperature of the samples by increasing organoclay content is observed by differential scanning calorimetry (DSC). Transmission electron micro scopy (TEM) reveals that clay layers are partially exfoliated in the polymer matrix containing 2 wt % of organomodified montmorillonite (PSON 2) and a dispersion of partially exfoliated clay stacks is formed.

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Section: Psmentioning

confidence: 99%

Polystyrene–organoclay nanocomposites produced by in situ activators regenerated by electron transfer for atom transfer radical polymerization

Khezri

Haddadi‐Asl

Roghani‐Mamaqani

et al. 2012

Journal of Polymer Engineering

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“…Wang et al observed that ultrasound or ultrasonic irradiation processes assisted emulsion polymerization and could promote the formation of exfoliated layers during nanocomposite synthesis [28]. In addition, the results of Yang et al indicated that PS-clay nanocomposites synthesized via emulsion polymerization had better layer dispersion than those synthesized by suspension polymerization [29]. Therefore, emulsion polymerization is an efficient technique for preparing polymer-MMT nanocomposite particles with exfoliated structures and monodispersity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Polystyrene-Montmorillonite Nanocomposite Particles Using an Anionic-Surfactant-Modified Clay and Their Friction Performance

Yue

Deng

et al. 2018

Applied Sciences

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Polystyrene-organo-montmorillonite (PS-OMMT) nanocomposite particles were prepared via emulsion polymerization of styrene in the presence of montmorillonite modified with an anionic surfactant, sodium lauryl sulfonate (SLS), and its tribological properties as an additive to polyalphaolefin (PAO) were tested. The results of Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA) showed that SLS molecules resided in the montmorillonite (MMT) interlayer space. The effects of OMMT on the morphology and properties of the nanocomposites were also investigated. Gel permeation chromatography (GPC) and dynamic light scattering (DLS) demonstrate that the presence of OMMT can effectively reduce the average molecular weight and average particle size of PS. XRD and transmission electron microscopy (TEM) of the PS-OMMT nanocomposites indicate that exfoliated and intercalated structures form and that the MMT layers either are partly embedded inside the PS particles or remain on their surface. Compared with pure PS, the PS-OMMT nanocomposites possessed higher stability to thermal decomposition and higher glass transition temperatures. Adding nanocomposite particles reduces the friction coefficient, and thus, the antiwear properties of the PAO are significantly improved. The PS-OMMT-3 (3 wt % of OMMT based on styrene) particles have the best tribological performance and maintained a stable, very low coefficient of friction of 0.09.

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“…So many open papers have reported polystyrene (PS)/inorganic particles composites. Yang et al have synthesized PS/clay nanocomposite by suspension and emulsion polymerization . Yang et al have successfully prepared PS/montmorillonite nanocomposite via in situ emulsion polymerization .…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of polystyrene/modified carbon black composite beads via in situ suspension polymerization

Zheng

Sun

et al. 2013

Polym. Compos.

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A facile and effective method was introduced into this article to modify carbon black (CB). Fourier‐transform infrared spectrum demonstrates the chemical structure of CB has obviously changed after surface modification. Compared with pure CB, the thermogravimetric analysis illustrates thermal behavior of modified CB (MCB) exhibits a well‐defined difference from CB. Besides, aggregation phenomenon existed in CB is weakened evidently after surface modification. A series of polystyrene (PS) composite beads in presence of MCB were synthesized via in situ suspension polymerization process. The effects of benzoyl peroxide dosage and MCB dosage on the polymerization time of PS composite beads were systematically researched. After modification, the inhibition effect of MCB on the polymerization of PS/MCB composite beads is obviously weakened. The dispersion of MCB in PS/MCB composite beads is greatly improved than that of CB in PS/CB composite beads. Moreover, PS/MCB beads have the better thermal stability than that of PS and PS/CB composite beads. POLYM. COMPOS., 34:1110–1118, 2013. © 2013 Society of Plastics Engineers

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Preparation of polystyrene/clay nanocomposite by suspension and emulsion polymerization

Cited by 17 publications

References 20 publications

Polystyrene–organoclay nanocomposites produced by in situ activators regenerated by electron transfer for atom transfer radical polymerization

Polystyrene–organoclay nanocomposites produced by in situ activators regenerated by electron transfer for atom transfer radical polymerization

Synthesis and Characterization of Polystyrene-Montmorillonite Nanocomposite Particles Using an Anionic-Surfactant-Modified Clay and Their Friction Performance

Preparation and characterization of polystyrene/modified carbon black composite beads via in situ suspension polymerization

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