Effect of Palladium Nanoparticles on the Thermal Degradation Kinetics of α Crystalline Syndiotactic Polystyrene

Jae-Young Lee; Shin Horiuchi; Hyeong-Ki Choi

Journal of Industrial and Engineering Chemistry, Vol.12, No.6, 862-867, November, 2006

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Effect of Palladium Nanoparticles on the Thermal Degradation Kinetics of α Crystalline Syndiotactic Polystyrene

Jae-Young Lee, Shin Horiuchi, and Hyeong-Ki Choi^{1, †}

Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1,Higashi, Tsukuba, Ibaraki 305-8565, Japan
¹Manufacturing Technology and Standards, Agancy for Technology and Standards (ATS), Gyeonggi-do427-805, Korea

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Palladium (Pd) nanoparticles were incorporated into a neat s-PS by a drying process consisting of simultaneous vaporization, penetration and reduction steps of palladium (Ⅱ) bis(acetylacetonato), Pd (acac)2, used as a precursor. In order to characterize the crystalline structure, distribution of Pd nanoparticles, and thermal stability, wide-angle X-ray diffraction (WAXD), transmission electron microscopy (TEM), and dynamic and isothermal thermogravimetric (TG) analyses were carried out. s-PS film with α crystalline form was prepared by rapid cooling the melted state and TEM observation showed that Pd nanoparticles were selectively located on the amorphous region. We also found that the Pd nanoparticles with 1.49 wt% enhanced the thermal stability of s-PS and the enhancement of thermal stability was mainly due to the hindrance of the mobility of polymer chains by the Pd nanoparticles.

Keywords:Pd nanoparticles;s-PS;thermal degradation;Kissinger equation

[References]

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[1] Manfredi C, De Rosa C, Guerra G, Rapacciuolo M, Auriemma F, Corradini P, Macromol. Chem. Phys., 196, 2795 (1995)

[2] Xu D, Ke Y, Hu Y, Macromol. Chem. Phys., 203, 80 (2002)

[3] Guerra G, Vitagliano VM, De Rosa C, Petraccone V, Corradini P, Macromolecules, 23, 1539 (1990)

[4] Auriemma F, Petraccone V, Dal Poggetto F, De Rosa C, Guerra G, Manfredi C, Corradini P, Macromolecules, 26, 3772 (1993)

[5] Tashiro K, Ueno Y, Yoshioka A, Kobayashi M, Macromolecules, 34(2), 310 (2001)

[6] Woo EM, Sun YS, Lee ML, Polymer, 40(15), 4425 (1999)

[7] Rotello V, in Nanoparticles: Building Blocks for Nanotechnology, Chapter 5, Kluwer Academic/ Plenum Publishers, New York (2004)

[8] Xu Y, Sun HB, Ye JY, Matsuo S, Misawa H, J. Opt. Soc. Am. B, 18, 1084 (2001)

[9] Haes AJ, Zou SL, Schatz GC, Van Duyne RP, J. Phys. Chem. B, 108(22), 6961 (2004)

[10] Thurn-Albrecht T, Schotter J, Kstle GA, Emley N, Shibauchi T, Krusin-Elbaum L, Guarini K, Black CT, Tuominen MT, Russell TP, Science, 290, 2126 (2000)

[11] Delamarche E, Geissler M, Vichiconti J, Graham WS, Andry PA, Flake JC, Fryer PM, Nunes RW, Michel B, O'Sullivan EJ, Schmid H, Wolf H, Wisnieff RL, Langmuir, 19(14), 5923 (2003)

[12] Aymonier C, Bortzmeyer D, Thomann R, Mlhaupt R, Chem. Mater., 15, 4874 (2003)

[13] Yoda S, Hasegawa A, Suda H, Uchimaru Y, Haraya K, Tsuji T, Otake K, Chem. Mater., 16, 2363 (2004)

[14] Horiuchi S, Fujita T, Hayakawa T, Nakao Y, Langmuir, 19(7), 2963 (2003)

[15] Schnabel W, in Polymer Degradation: Principles and Practical Applications, Chapter 2, Carl Hanser Verlag, Munich (1982)

[16] Kissinger HE, Anal. Chem., 29, 1702 (1957)

[17] Lee JY, Shim MJ, Kim SW, J. Appl. Polym. Sci., 81, 479 (2001)