Analysis of non-covalent interactions between the nanoparticulate fillers and the matrix polymer as applied to shape memory performance

被引:33
作者
Gunes, I. Sedat [1 ]
Perez-Bolivar, Cesar [2 ,3 ]
Cao, Feina [1 ]
Jimenez, Guillermo A. [1 ]
Anzenbacher, Pavel, Jr. [2 ,3 ]
Jana, Sadhan C. [1 ]
机构
[1] Univ Akron, Dept Polymer Engn, Akron, OH 44325 USA
[2] Bowling Green State Univ, Dept Chem, Bowling Green, OH 43403 USA
[3] Bowling Green State Univ, Ctr Photochem Sci, Bowling Green, OH 43403 USA
关键词
THERMOPLASTIC POLYURETHANE NANOCOMPOSITES; ORGANOCLAY STRUCTURE; ELASTOMERS; MORPHOLOGY; CARBON; TEMPERATURE; COMPOSITES; CRYSTALLIZATION; ADSORPTION; SEGMENTS;
D O I
10.1039/b922027e
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
Non-covalent interactions between filler particles and polyurethanes were investigated using fluorescence emission spectroscopy. The results were used in the analysis of shape memory (SM) performance of polyurethanes. Composites of shape memory polyurethane (SMPU) and carbon nanofiber (CNF), oxidized carbon nanofiber (ox-CNF), organoclay, silicon carbide, and carbon black were prepared from diphenylmethane diisocyanate, 1,4-butanediol, and poly(caprolactone) diol. It was revealed by fluorescence emission spectroscopy that primarily the urethane groups located in the hard segments of SMPU interacted with the polar functional groups on filler particles. A close correlation between the extent of non-covalent filler-matrix interactions, soft segment crystallinity, and SM properties of polyurethane composites was discussed. It was observed that weak non-covalent interactions of polymer chains with CNF and SiC particles caused significant reductions in soft segment crystallinity of SMPU and hence the shape memory properties of the composites.
引用
收藏
页码:3467 / 3474
页数:8
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