Polyester-based thermoplastic elastomer/MWNT composites: Rheological, thermal, and electrical properties

Bae, Jeong-Sik; Lee, Seungwon; Kim, Byoung Chul; Cho, Ho Hyun; Chae, Dong Wook

doi:10.1007/s12221-013-0729-8

Cited by 25 publications

(26 citation statements)

References 27 publications

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“…Even at amounts as high as 4 wt %, a notable increase in the T c of Hy3078/ME100 was observed, while the T c increased by approximately 10°C with both Hy3078/WXFN and WXFP compared to the pure Hy3078. This indicates that the clay played a role in reducing the chain mobility and promoting the crystallization as a nucleation agent . In a previous DSC analysis by Aso et al .…”

Section: Resultsmentioning

confidence: 78%

“…The storage modulus of the Hy3078 and their composites are shown in Figures (b, d, and f). In particular, an increase in storage modulus was observed for Hy3078/4WXFP‐ODTMA compared to Hy3078/2WXFP‐ODTMA indicating that the presence of organoclays has much more significant effects on the elastic properties than on the viscous ones at a low concentration range …”

Section: Resultsmentioning

confidence: 99%

“…The study of TPE‐layered silicate nanocomposites is still relatively immature. Previously, Hytrel nanocomposites were synthesized through a melt‐compounding process for improvements in viscoelastic properties . So far, there have been no investigations in the literature of Hytrel 3078 nanocomposites being prepared via twin‐screw extrusion, and there have been no thorough studies into the effects of low and high aspect ratio silicate clays on the microstructure.…”

Section: Introductionmentioning

confidence: 99%

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Structure‐property relationships in copolyester elastomer‐layered silicate nanocomposites

Alosime

Edwards

Martin

2014

J of Applied Polymer Sci

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While the field of polymer-clay nanocomposites is reaching maturity, some parts of the studied systems still present researchers with possibilities for the improvement of material properties. This study entails the understanding of the relationships in copolyester elastomer/organically modified layered silicate nanocomposite and the structure-property relationships within the system of the nanocomposite. A series of these nanocomposites was prepared via twin-screw extrusion melt compounding. The experiments included the following three types of synthetic organosilicates: high aspect ratio Somasif (ME100) fluoromica and two lower aspect ratio Laponite synthetic hectorites, (WXFN) and (WXFP). These organosilicates were modified with quaternary octadecyltrimethylammonium bromide (ODTMA) and were used to prepare the nanocomposites. The nanocomposite structure on a micro-and nanometre scales was evaluated by two techniques, such as X-ray diffraction (XRD) and transmission electron microscopy (TEM). The mechanical properties of the nanocomposites were examined to determine the impact aspect ratio of the nanofiller and wt % loading have on performance. The addition of the 2 wt % high aspect ratio of ME100-ODTMA, in particular, showed statistically improved tensile strength, tear resistance, creep resistance, and water vapor permeation barrier enhancement.

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Section: Resultsmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structure‐property relationships in copolyester elastomer‐layered silicate nanocomposites

Alosime

Edwards

Martin

2014

J of Applied Polymer Sci

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“…Inferior moisture barrier property of PET above its T g can be improved by introducing some fillers like graphene, 8 silica nanoparticles, or nano tubes. 10,11 Another, most widely used approach is by controlling the chemical structures of polyester themselves. Some new polyester-based materials have been synthesized with proper molecular design.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Copolyesters Derived from 1,4-Cyclohexanedimethanol, Terephthalic Acid, and 2,6-Naphthalenedicarboxylic Acid with Enhanced Thermal and Barrier Properties

Park¹,

Hussain²,

Kang³

et al. 2018

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In this work, a series of poly(1,4-cyclohexylenedimethylene terephthalate-co-1,4-cyclohexylene dimethylene 2,6-naphthalenedicarboxylate) (PCTN) copolymers with different compositions of two diacids: terephthalic acid (TPA) and 2,6-naphthalenedicarboxylic acid (NDA), and stoichiometry matched 1,4-cyclohexanedimethanol (CHDM) were synthesized directly by a melt polymerization technique. Thermal properties of synthesized copolymers were measured by a differential scanning calorimetry (DSC). The incorporation of either NDA or CHDM improved the glass transition temperature (T g) of PCTN compared to poly(ethylene terephthalate) (PET). Thermal degradation behaviors were analyzed using a thermogravimetric analysis (TGA). Chemical structures of the obtained copolyesters were investigated by a nuclear magnetic resonance spectroscopy (1 H NMR). Our results showed that the thermal and optical properties (determined by UV-Vis spectrophotometer) of the PCTN copolyesters were directly dependent on the ratio of TPA and NDA. It was also found that PCTN films have superior optical, thermal, and barrier (reduced water absorption) properties than PET and poly(ethylene naphthalate) (PEN) films.

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“…All of spinning dopes are prepared at the PVA concentration of 15wt% because the extremely high Regardless of temperature and coagulant the coagulation does not occur when pure water is singly used. 26) . PVA is prepared from saponification of polyvinylacetate which has high linearity without branching.…”

Section: Effects Of Dmso/h2o Ratio On the Coagulating Properties Of Pmentioning

confidence: 99%

Design of Spinning and Subsequent Drawing Parameters to Improve the Mechanical Properties of PVA Fibers

Chae¹,

Kim²,

Kim³

2016

Textile Coloration and Finishing

Self Cite

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In this study, efforts were made to enhance the mechanical properties of the poly(vinyl alcohol) (PVA) fibers of medium molecular weight(number-average degree of polymerization=1735) varying the ratio in DMSO/H2O mixed solvent and spinning/drawing conditions. The gel fibers prepared from pure DMSO were opaquely frozen in the coagulating bath of -20℃. However, transparent gel fibers were formed without freezing for the mixture to contain water less than 80wt%. As the amount of water in the mixture increased the residual solvent in the coagulated gel fibers decreased ranging from 85 to 42wt%. The complex viscosity increased with increasing PVA concentration in 80/20 DMSO/H2O exhibiting remarkable shear thinning at 18wt%. In the Cole-Cole plot, the 18wt% PVA solutions gave a deviated curve from 12 and 15wt% ones. Thus the optimum PVA concentration for the spinning processing of medium MW PVA solutions in 80/20 DMSO/H2O was determined to 18wt% with rheological concept. Low degree of drawing during hot drawing process in the dry state was available for high bath draft in the coagulation bath. The most improved mechanical properties were observed by applying the highest possible draw ratio attained by reducing bath draft over multi-step drawing process. In the given bath draft, linear relationship was observed between both tensile strength and modulus and draw ratio showing the inflection points at the draw ratio of 19.5 and 18.0 for tensile strength and modulus, respectively.

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Polyester-based thermoplastic elastomer/MWNT composites: Rheological, thermal, and electrical properties

Cited by 25 publications

References 27 publications

Structure‐property relationships in copolyester elastomer‐layered silicate nanocomposites

Structure‐property relationships in copolyester elastomer‐layered silicate nanocomposites

Synthesis and Properties of Copolyesters Derived from 1,4-Cyclohexanedimethanol, Terephthalic Acid, and 2,6-Naphthalenedicarboxylic Acid with Enhanced Thermal and Barrier Properties

Design of Spinning and Subsequent Drawing Parameters to Improve the Mechanical Properties of PVA Fibers

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