Dynamic mechanical properties of elastomeric nanoparticle composites

Sungwon Ma; Yonathan Thio

Macromolecular Research, Vol.24, No.10, 915-923, October, 2016

DOI10.1007/s13233-016-4121-6 Export Citation

Dynamic mechanical properties of elastomeric nanoparticle composites

Sungwon Ma^†, and Yonathan Thio

School of Polymer, Textile and Fiber Engineering, Georgia Institute of Technology, Atlanta, USA

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The blends of two crosslinked polystyrene-b-polyisoprene (PS-b-PI) copolymers with homopolystyrene were investigated for their dynamic mechanical properties. Elastomeric block copolymer nanofibers utilized as filler were prepared by employing the phase separation property of a polystyrene-b-polyisoprene copolymer, which was then exposed to a crosslinking agent (S2Cl2) for cold vulcanization. The crosslinking density and morphology of nanofillers resulted in three elastomeric block copolymer nanofillers: fully cross-linked nanofiber (FCF), fully crosslinked multi-junctioned nanofiber (FCM), and partially crosslinked multi-junctioned sample (PCM). Uncrosslinked PS-PI block copolymer (UBC) was also studied as a comparison. Crosslinking density was calculated by measuring the change in intensity of the double bond peaks using FTIR spectroscopy. Thermo-mechanical properties and morphology of the blends were characterized by dynamic mechanical analysis (DMA) and scanning electron microscope (SEM). DMA results show that modulus increases with increasing filler loading in the terminal region for both PS/FCM and PS/FCF systems and the increasing rate is related to crosslinking density.

Keywords:nanofiber;DMA;cold vulcanization;crosslinking density;free volume

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[1] Cadek M, Coleman JN, Barron V, Hedicke K, Blau WJ, Appl. Phys. Lett., 81, 5123 (2002)

[2] Coleman JN, Khan U, Gun'ko YK, Adv. Mater., 18(6), 689 (2006)

[3] LeBaron PC, Wang Z, Pinnavaia TJ, Appl. Clay Sci., 15, 11 (1999)

[4] Croce F, Appetecchi GB, Persi L, Scrosati B, Nature, 394, 456 (1998)

[5] Gangopadhyay R, De A, Chem. Mater., 12, 608 (2000)

[6] Beecroft LL, Ober CK, Chem. Mater., 9, 1302 (1997)

[7] Thio YS, Argon AS, Cohen RE, Weinberg M, Polymer, 43(13), 3661 (2002)

[8] Wu JX, Thio YS, Bates FS, J. Polym. Sci. B: Polym. Phys., 43(15), 1950 (2005)

[9] Crosby AJ, Lee JY, Polym. Rev., 47, 217 (2007)

[10] Chen GH, Wu DJ, Weng WG, Yan WL, J. Appl. Polym. Sci., 82(10), 2506 (2001)

[11] Kumar S, Alam MA, Murthy JY, Appl. Phys. Lett., 90 (2007)

[12] Li J, Guo S, Zhai Y, Wang E, Electrochem. Commun., 11, 1085 (2009)

[13] Abramson AR, Kim WC, Huxtable ST, Yan HQ, Wu YY, Majumdar A, Tien CL, Yang PD, J. Microelectromech. Syst., 13, 505 (2004)

[14] Asaletha R, Kumaran MG, Thomas S, Eur. Polym. J., 35, 253 (1999)

[15] George S, Ramamurthy K, Anand JS, Groeninckx G, Varughese KT, Thomas S, Polymer, 40(15), 4325 (1999)

[16] Glazer J, Nature, 167, 404 (1951)

[17] Liu GJ, Yan XH, Duncan S, Macromolecules, 35(26), 9788 (2002)

[18] Liu GJ, Li Z, Yan XH, Polymer, 44(25), 7721 (2003)

[19] Chatterjee AP, Prokhorova DA, J. Appl. Phys., 101 (2007)

[20] Pearson RA, Yee AF, J. Mater. Sci., 24, 2571 (1989)

[21] Ishizu KJ, Onen A, J. Polym. Sci. A: Polym. Chem., 27, 3721 (1989)

[22] Hashimoto T, Tanaka H, Hasegawa H, Macromolecules, 23, 4378 (1990)

[23] Ferry JD, Viscoleastic Properties of Polymers, Wiley, New York, 1980.

[24] Ballard DGH, Wignall GD, Schelten J, Eur. Polym. J., 9, 965 (1973)