New molecular-scale information on polystyrene dynamics in PS and PS-BaTiO3 composites from FTIR spectroscopy

被引:124
作者
Olmos, D.
Martin, E. V.
Gonzalez-Benito, J. [1 ]
机构
[1] Univ Carlos III Madrid, Dept Ciencia & Ingn Mat & Ingn Quim, Leganes 28911, Spain
关键词
NORMAL VIBRATIONAL ANALYSIS; GLASS-TRANSITION; THERMAL-DEGRADATION; SILICA NANOPARTICLES; ATACTIC POLYSTYRENE; PARTICLE-SIZE; POLY(ETHYLENE-TEREPHTHALATE); NANOCOMPOSITES; FLUORESCENCE; MORPHOLOGY;
D O I
10.1039/c4cp03516j
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A new idea to understand the macromolecular motion occurring along the thermal relaxations of polystyrene (PS) and PS-barium titanate composites is proposed. Detailed analysis of PS infrared bands provides a better knowledge of the factors affecting polymer dynamics. Average spectral positions and integrated absorbance of bands in the region of C-H out-of-plane vibrations showed a continuous decrease with temperature, whereas those in the region of aliphatic and aromatic C-H stretching vibrations showed the sharpest changes with temperature. Relaxation temperatures were determined from the changes observed in the band wavenumber or area with temperature. These results were attributed to changes in the distribution of the phenyl p-electron cloud, causing important dipole moment variations in the different vibration modes when the thermal transitions are taking place. Finally, although the presence of BaTiO3 particles does not seem to exert any specific effect on the PS dynamics in the glassy state, the Curie transition of these particles might induce a kind of confinement effect observable by FTIR.
引用
收藏
页码:24339 / 24349
页数:11
相关论文
共 47 条
[1]  
[Anonymous], 1999, SPECTROSCOPY POLYM
[2]  
[Anonymous], 2003, Nanocomposite science and technology
[3]   DETECTION OF POLYMER TRANSITION TEMPERATURES BY INFRARED ABSORPTION SPECTROMETRY [J].
ANTON, A .
JOURNAL OF APPLIED POLYMER SCIENCE, 1968, 12 (09) :2117-&
[4]   Effect of silica nanoparticles on the local segmental dynamics in poly(vinyl acetate) [J].
Bogoslovov, R. B. ;
Roland, C. M. ;
Ellis, A. R. ;
Randall, A. M. ;
Robertson, C. G. .
MACROMOLECULES, 2008, 41 (04) :1289-1296
[5]   Polycarbonate/SiC nanocomposites -: influence of nanoparticle dispersion on molecular mobility and gas transport [J].
Böhning, M ;
Goering, H ;
Hao, N ;
Mach, R ;
Schönhals, A .
POLYMERS FOR ADVANCED TECHNOLOGIES, 2005, 16 (2-3) :262-268
[6]   Real dispersion of isolated fumed silica nanoparticles in highly filled PMMA prepared by high energy ball milling [J].
Castrillo, P. D. ;
Olmos, D. ;
Amador, D. R. ;
Gonzalez-Benito, J. .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2007, 308 (02) :318-324
[7]   Novel Polymer Composites Based on a Mixture of Preformed Nanosilica-Filled Poly(methyl methacrylate) Particles and a Diepoxy/Diamine Thermoset System [J].
Castrillo, P. D. ;
Olmos, D. ;
Gonzalez-Benito, J. .
JOURNAL OF APPLIED POLYMER SCIENCE, 2009, 111 (04) :2062-2070
[8]  
Chen GM, 2001, MACROMOL CHEM PHYSIC, V202, P1189, DOI 10.1002/1521-3935(20010401)202:7<1189::AID-MACP1189>3.0.CO
[9]  
2-M
[10]   The thermal analysis of poly(ethylene terephthalate) by FTIR spectroscopy [J].
Chen, Ziyu ;
Hay, J. N. ;
Jenkins, M. J. .
THERMOCHIMICA ACTA, 2013, 552 :123-130