Rubber products prepared from silica modified by radiation-induced admicellar polymerization

Pongprayoon, Thirawudh; Yooprasert, Narissara; Suwanmala, Phiriyatorn; Hemvichian, Kasinee

doi:10.1016/j.radphyschem.2012.01.034

Cited by 13 publications

(7 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…also successfully applied admicellar polymerization to coat a thin film of polystyrene on cotton. Radiation‐induced admicellar polymerization was utilized to coat polyisoprene on silica surface to improve the compatibility between modified silica and rubber . The results revealed that mechanical properties of rubber reinforced with the modified silica were superior to those reinforced with unmodified silica.…”

Section: Introductionmentioning

confidence: 99%

Enhancing compatibility between poly(lactic acid) and thermoplastic starch using admicellar polymerization

Hemvichian¹,

Suwanmala²,

Kangsumrith

et al. 2016

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

An alternative method to improve the compatibility between poly(lactic acid) (PLA) and cassava starch (CS) is proposed and investigated. Admicellar polymerization is used to modify the surface of CS with poly(methyl methacrylate) (PMMA) in order to make it more hydrophobic and hence more compatible with PLA. The increased hydrophobicity of PMMA modified cassava starch (MS) is validated by contact angle measurement. Results from iodine test, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X‐ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) confirm the formation of PMMA film on MS surface. Mechanical properties of PLA‐CS and PLA‐MS blends are investigated to compare their compatibility. Noticeable improvements in blend tensile strength and elongation at break evidently show that MS is more hydrophobic as well as more compatible with PLA than CS. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43755.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhancing compatibility between poly(lactic acid) and thermoplastic starch using admicellar polymerization

Hemvichian¹,

Suwanmala²,

Kangsumrith

et al. 2016

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…The resultant TESPT‐modified silica as the filler is suitable for SSBR, because TESPT is chemically bonded on the surface of silica to acquire greatly increased compatibility with the rubber matrix. Pongprayoon et al [12] modified silica by admicellar polymerisation, and they found that the modified silica as the filler can effectively improve the mechanical properties of rubber. Pattanawanidchai et al [13] made use of a xanthate reaction to modify precipitated silica and obtained an environmentally friendly and uniformly dispersed nano‐silica suitable for natural rubber matrix.…”

Section: Introductionmentioning

confidence: 99%

Preparation of nano‐silica loaded N‐cyclohexyl‐2‐benzothiazole sulphonamide and its application in solution styrene‐butadiene rubber/butadiene rubber composites

Tian

Mao

Zhang

et al. 2017

Micro & Nano Letters

View full text Add to dashboard Cite

N-cyclohexyl-2-benzothiazole sulphonamide (rubber vulcanisation accelerator CZ) was grafted onto the surface of dispersible nano-silica (DNS) to obtain silica-loaded rubber vulcanisation accelerator CZ (DNS-CZ) through in-situ surface modification. A series of as-prepared DNS-CZ samples with different CZ loadings were used as the fillers to reinforce the composites made of solution styrene-butadiene rubber (SSBR) and butadiene rubber (BR). The effect of DNS-CZ fillers on the mechanical properties of the SSBR/BR composites was investigated in relation to the scanning electron microscopic observation of the filler dispersion in the rubber matrix. It was found that the CZ is chemically bonded onto the surface of nano-silica, thereby effectively reducing the polarity of the nano-silica and enhancing its compatibility with the rubber matrix. Therefore, the SSBR/BR composites filled with DNS-CZ exhibit greatly improved mechanical properties and Akron abrasion resistance than the counterparts filled with unloaded DNS. Particularly, when the loading amount of the CZ is set as 81.10 mmol/kg, the resultant SSBR/BR/DNS-CZ composite exhibits the best mechanical properties and Akron abrasion resistance, showing promising application for green tire tread.

show abstract

“…Since initial reports in the mid-1980s [1,2], the admicellar polymerization technique has proven to be an effective way to modify the surface characteristics of solid substrates for rubber reinforcement [3][4][5], corrosion control [6,7], the formation of conducting films [8][9][10][11][12], the modification of cotton fibers [13][14][15][16][17][18][19], and composite fillers [20,21]. Admicellar polymerization has been summarized as a four-step process: formation of adsorbed surfactant aggregates (admicelles), monomer solubilization into the admicelle (adsolubilization), polymerization, and partial removal of surfactant.…”

Section: Introductionmentioning

confidence: 99%

“…In an emulsion polymerization system, this ratio is typically greater than 500 and may exceed 1000 [23,24]. Previous admicellar polymerization studies demonstrated that low M/I values (below 15) were needed in order to achieve significant conversion of monomer into polymer [4,[16][17][18][25][26][27][28][29][30]. Pongprayoon et al studied the effect of M/I values ranging from 1 to 4 for the synthesis of a polystyrene-coated cotton fabric via admicellar polymerization and found that cotton fibers with the highest surface hydrophobicity were formed at M/I values of 1 [31,32].…”

Section: Introductionmentioning

confidence: 99%

Effect of Oxygen and Initiator Solubility on Admicellar Polymerization of Styrene on Silica Surfaces

Cheah

Bhikha

O’Haver

et al. 2017

International Journal of Polymer Science

View full text Add to dashboard Cite

Although admicellar polymerization has been termed the surface analog of emulsion polymerization, previous reports utilizing free radical-initiated admicellar polymerization relied on high levels of the free radical initiator when compared to emulsion polymerization, likely due to the presence of oxygen in the reported admicellar polymerization systems. Admicellar polymerizations of styrene on the surface of precipitated silica initiated by either a water-soluble or a water-insoluble initiator were studied to determine the effect of dissolved oxygen and free radical initiator solubility on the kinetics, yield, and molecular weight of the polymer formed. Results show that the presence of oxygen reduces the polymer yield and limits molecular weight. The solubility of the initiator also affected the polymer formed in the admicellar polymerization of styrene. While monomer conversions and polymer yield were similar, the molecular weights of polymerizations initiated by a water-soluble initiator were higher than comparable polymerizations initiated by a water-insoluble initiator.

show abstract

Rubber products prepared from silica modified by radiation-induced admicellar polymerization

Cited by 13 publications

References 13 publications

Enhancing compatibility between poly(lactic acid) and thermoplastic starch using admicellar polymerization

Enhancing compatibility between poly(lactic acid) and thermoplastic starch using admicellar polymerization

Preparation of nano‐silica loaded N‐cyclohexyl‐2‐benzothiazole sulphonamide and its application in solution styrene‐butadiene rubber/butadiene rubber composites

Effect of Oxygen and Initiator Solubility on Admicellar Polymerization of Styrene on Silica Surfaces

Contact Info

Product

Resources

About