Polystyrene‐b‐Poly(Ethylene‐r‐butylene)‐b‐Polystyrene Triblock Copolymer/Organoclay Nanocomposites and Their Phase Characteristics

Lim, Sang Kyoo; Lee, C. H.; Kwon, Yong Ku; Choi, Hyoung Jin

doi:10.1081/mb-120030007

Cited by 16 publications

(7 citation statements)

References 42 publications

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“…Though the work explains well the reason for flipping of BCP layers due to clay layers, it demonstrates inferior mechanical properties on clay loading to poly(styrene- b -butadiene- b -styrene) (SBS) matrix. Though a few studies are available on poly(styrene- b -ethylene- co -butylene- b -styrene) triblock copolymer (S-EB-S)-clay nanocomposites, – organically modified costly organoclays are employed for compatibility with hydrophobic polymer. For the nonpolar nature of S-EB-S, workers including the present authors , have found it very difficult to disperse and exfoliate montmorillonite clays (MT) mostly due to the incompatibility with hydrophilic clay from its tactoid form.…”

Section: Introductionmentioning

confidence: 99%

Insights into Montmorillonite Nanoclay Based ex Situ Nanocomposites from SEBS and Modified SEBS by Small-Angle X-ray Scattering and Modulated DSC Studies

Ganguly

Bhowmick

2008

Macromolecules

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The work reported here is concerned with the quantification and correlation drawn on the effect of nanoclay platelets in the lamella orders in the nanocomposites of poly[styrene-b-(ethylene-co-butylene)-bstyrene] triblock copolymer (SEBS) and polar-modified SEBSs by using small-angle X-ray scattering (SAXS) and modulated DSC (MDSC) studies with morphological evidence from atomic force microscopy (AFM) and transmission electron microscopy (TEM). 2-4 wt % organically modified nanoclay OMT loading assists increment in the lamellar orders of the neat SEBS owing to interaction in these hybrid systems indicated by the positive shift in glass transition temperature by DSC. Polar-modified SEBS samples show deviation of the corresponding ordering lengths and pattern supported by MDSC, while their unmodified MT nanoclay based nanocomposites exhibit structural regeneration of ordering pattern and morphology evidenced from AFM and TEM due to nucleating effect of the added nanoclay.

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Section: Introductionmentioning

confidence: 99%

Insights into Montmorillonite Nanoclay Based ex Situ Nanocomposites from SEBS and Modified SEBS by Small-Angle X-ray Scattering and Modulated DSC Studies

Ganguly

Bhowmick

2008

Macromolecules

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“…The ST Lim research group prepared SEBS/organophilic montmorillonite (Org-MMT) nanocomposite by the solvent casting method in different compositions without the use of any compatibilizer to improve the thermal properties of neat SEBS copolymer. 5 The increase in thermal degradation temperature in the nanocomposites was found to be directly proportional to the amount of the clay. Ganguly et al reported that MMT clay modified with dimethyl dehydrogenated tallow quaternary ammonium salt increased storage modulus of SEBS, whereas it decreased its damping factor.…”

Section: Introductionmentioning

confidence: 89%

Preparation of high-strength SEBS nanocomposites reinforced with halloysite nanotube: Effect of SEBS-g-MA compatibilizer

Arman

Tekay

Şen

2019

Journal of Thermoplastic Composite Materials

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Poly(styrene -b-ethylene- co-butylene -b-styrene) (SEBS)/organophilic halloysite nanotube (Org-HNT) nanocomposites were prepared by solution mixing and then compression molded. Maleic anhydride grafted SEBS (SEBS- g-MA) was also used as a compatibilizer in preparation of SEBS/SEBS- g-MA/Org-HNT ternary nanocomposites. Surface morphologies and both static and dynamic mechanical analyses as well as thermal stabilities of the nanocomposites were carried out. Both the binary and ternary nanocomposites exhibited higher tensile moduli, tensile strength, and toughness values compared to neat SEBS. The elastic modulus was found to increase about 385% and 320% with addition of 3 and 5 phr Org-HNT into the SEBS matrix, respectively, while the maximum toughness was achieved via SEBS-5H composite with an increase of 45%. The ternary nanocomposite having 3 phr Org-HNT and 10 phr SEBS- g-MA (3H10SMA) gave about a 325% and 103% increase in the elastic modulus and toughness, respectively, together with a 75% increase in the tensile strength as the maximum value. This result was ascribed to interactions of the surface of the nanotubes with the maleic anhydride (MA) group of the compatibilizer. The same nanocomposite was also found to have two times higher dynamic storage modulus at 25°C than neat SEBS and almost the same damping value, which is an indication of improvement in the elastic character of SEBS without impairing its damping ability. Although a much higher damping value was obtained via use of 20 phr SEBS- g-MA with the same amount of nanotubes, the corresponding storage modulus decreased too much, close to that of neat SEBS. The enhanced tensile modulus, strength, and toughness of the 3H10SMA nanocomposite, which is consistent with its dynamic mechanical properties, indicate a good balance between the toughness/damping and stiffness. Moreover, all the nanocomposites exhibited better thermal stabilities than neat SEBS, showing higher midpoint degradation temperatures and peak maximum temperatures at which the maximum degradation occurs.

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“…The LCC/OMMT nanocomposite films were prepared via a conventional solvent casting method, one which has been widely adopted for various polymer-inorganic nanocomposite systems such as poly(ethylene oxide), [19] polystyrene, [20] biodegradable polymers, [21] block copolymer, [22] and poly(vinyl chloride). [23] Three different samples with different OMMT contents of 0 wt%, 1 wt%, and 3 wt% in the LCC matrix were fabricated, hereafter labeled as LCC, LCC-CN01, and LCC-CN03, respectively.…”

Section: Preparation Of Lcc/ommt Nanocomposite Filmsmentioning

confidence: 99%

Fabrication and Thermal Characteristics of Liquid Crystalline Copolyester/OMMT Nanocomposite Films

Yang

Okamoto

et al. 2011

Journal of Macromolecular Science, Part B

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Liquid crystalline copolyester (LCC)/organically modified-montmorillonite (OMMT) nanocomposite films were prepared by a solvent casting method with different OMMT contents, using p-chlorophenol as a solvent. Both LCC and LCC/OMMT were heat treated to obtain the smectic structure. To examine their internal structure and morphology, the prepared LCC/OMMT nanocomposite films were characterized by an X-ray diffraction method and TEM (transmission electron microscopy). The d-spacing of the silicate layers for each LCC/OMMT nanocomposite film was shifted, indicating that the OMMT particles were dispersed in the LCC matrix and formed intercalated structures. Thermal characteristics of the LCC/OMMT nanocomposite films were investigated by differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), and thermo-mechanical analysis (TMA). The gel-to-liquid crystal transition (T c-lc ) and degradation temperatures (T d ) of both LCC and LCC/OMMT nanocomposite films with different heat treatment time were examined. The T c-lc and T d of the LCC/OMMT were found to be enhanced compared with those of the LCC film, exhibiting their improved thermal characteristics.

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Polystyrene‐b‐Poly(Ethylene‐r‐butylene)‐b‐Polystyrene Triblock Copolymer/Organoclay Nanocomposites and Their Phase Characteristics

Cited by 16 publications

References 42 publications

Insights into Montmorillonite Nanoclay Based ex Situ Nanocomposites from SEBS and Modified SEBS by Small-Angle X-ray Scattering and Modulated DSC Studies

Insights into Montmorillonite Nanoclay Based ex Situ Nanocomposites from SEBS and Modified SEBS by Small-Angle X-ray Scattering and Modulated DSC Studies

Preparation of high-strength SEBS nanocomposites reinforced with halloysite nanotube: Effect of SEBS-g-MA compatibilizer

Fabrication and Thermal Characteristics of Liquid Crystalline Copolyester/OMMT Nanocomposite Films

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