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Surface characteristics of polyhedral oligomeric silsesquioxane-modified clay and its application in polymerization of macrocyclic polyester oligomers
journal contribution
posted on 2016-09-14, 13:09 authored by Chaoying Wan, Feng Zhao, Xujin BaoXujin Bao, Balasubramanian Kandasubramanian, Matthew P. DugganNovel 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.
Funding
The authors gratefully acknowledge the financial support of the UK Department of Trade and Industry/ Technology Stategy Board.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
Published in
J. Physical Chemistry BVolume
112Issue
(38)Pages
11915 - 11922Citation
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.Publisher
© American Chemical SocietyVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2008Notes
Closed access.ISSN
1520-6106eISSN
1520-5207Publisher version
Language
- en