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Title: Surface characteristics of polyhedral oligomeric silsesquioxane-modified clay and its application in polymerization of macrocyclic polyester oligomers
Authors: Wan, Chaoying
Zhao, Feng
Bao, Xujin
Kandasubramanian, Bala
Duggan, Matthew P.
Keywords: POSS
Issue Date: 2008
Publisher: © American Chemical Society
Citation: WAN, C. ... et al., 2008. Surface characteristics of polyhedral oligomeric silsesquioxane-modified clay and its application in polymerization of macrocyclic polyester oligomers. Journal Physical Chemistry B, 112 (38), pp.11915-11922.
Abstract: Novel porous aminopropyllsooctyl polyhedral oligomeric silsesquioxane (POSS) modified montmorillonite clay complexes (POSS-Mts) with large interlayer distance and specific surface area have been successfully prepared via ion-exchange reaction and followed by freeze-drying treatment. The morphology of the POSS-Mts is highly influenced by the POSS concentration, pH of the suspension and drying procedure, but the interlayer distance of the POSS-Mts does not change much when the POSS concentration is above 0.4 CEC. The POSS-Mts were used as Sn-catalyst supporters to initiate the ring-opening polymerization of cyclic butylene terephthalate oligomers (CBT) for the first time. No diffraction peak was detected by wide-angle X-ray diffraction for the polymerized composites (pCBT/POSS-Mt), even at 10 wt % loading of POSS-Mt. A clay network rather than exfoliation structure was observed unexpectedly in the composites by transmission electron microscopy. The pCBT/POSS-Mt composite with 10 wt % POSS-Mt was further melt-compounded with commercial PBT resin as a master batch. The tensile properties of the resultant PBT/POSS-Mt composites were highly improved as compared to the pristine PBT due to the homogeneous dispersion of POSS-Mt in the PBT matrix.
Description: Closed access.
Sponsor: The authors gratefully acknowledge the financial support of the UK Department of Trade and Industry/ Technology Stategy Board.
Version: Published
DOI: 10.1021/jp805259q
URI: https://dspace.lboro.ac.uk/2134/22435
Publisher Link: http://dx.doi.org/10.1021/jp805259q
ISSN: 1520-6106
Appears in Collections:Closed Access (Materials)

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