SYNTHESIS AND BARRIER PROPERTIES OF POLY(EPSILON-CAPROLACTONE)-LAYERED SILICATE NANOCOMPOSITES

被引:1177
作者
MESSERSMITH, PB [1 ]
GIANNELIS, EP [1 ]
机构
[1] CORNELL UNIV,DEPT MAT SCI & ENGN,ITHACA,NY 14853
关键词
PERMEABILITY; NANOCOMPOSITES; POLYCAPROLACTONE; LAYERED SILICATES;
D O I
10.1002/pola.1995.080330707
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A new polymer-ceramic nanocomposite has been synthesized consisting of well-dispersed, two-dimensional layers of an organically modified mica-type silicate (MTS) within a degradable poly(epsilon-caprolactone) matrix. A protonated amino acid derivative of MTS was used to promote delamination/dispersion of the host layers and initiate ring-opening polymerization of epsilon-caprolactone monomer, resulting in poly(epsilon-caprolactone) chains that are ionically bound to the silicate layers. The polymer chains can be released from the silicate surface by a reverse ion-exchange reaction and were shown to be spectroscopically similar to pure poly(epsilon-caprolactone). Thick films of the polymer nanocomposite exhibit a significant reduction in water vapor permeability that shows a linear dependence on silicate content. The permeability of nanocomposite containing as low as 4.8% silicate by volume was reduced by nearly an order of magnitude compared to pure poly(epsilon-caprolactone). (C) 1995 John Wiley and Sons, Inc.
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页码:1047 / 1057
页数:11
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