Crystallite Cluster Structure Formation Resulting from Semi-Enclosed Cage Interaction in TSI-POSS/PU Hybrid Composites

Rui Pan; Robert Shanks; Ling Ling Wang

doi:10.4028/www.scientific.net/AMR.1091.19

Paper Titles

Preface and Committee

A Capacitive Ammonia Sensor Using the Commercial 0.18 μm CMOS Process
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Phosphorous Incorporated-Silicon Nanoparticles Synthesized Using Double Tube Reactor and Inductive Coupled Plasma
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Spectroscopic and Morphological Investigation of Copper-Containing Nanocomposites
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Crystallite Cluster Structure Formation Resulting from Semi-Enclosed Cage Interaction in TSI-POSS/PU Hybrid Composites
p.19

Adsorption of Sulfur’s Atoms on the Outer Surface of Carbon Nanotubes
p.25

Terbium Complex Triboluminophore for Optical Sensorics
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3-py-TTF: Efficient and Simple Colorimetric Sensor for Copper Ion in Aqueous Solutions
p.35

Research on SOFC of Composite Anode Material SrMoO₃-YSZ Impregnated with Gd_0.2Ce_0.8O_1.9 by Hard Template Method
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Crystallite Cluster Structure Formation Resulting from Semi-Enclosed Cage Interaction in TSI-POSS/PU Hybrid Composites

Abstract:

Trisilanolisobutyl polyhedral oligomeric silsesquioxane (TSI-POSS) with three hydroxyl functional groups pendent to a semi-enclosed cage, was incorporated in concentrations of 7, 13 and 22 wt% into 4,4'-methylenebis (phenyl isocyanate) (MDI) and glycerol propoxylate to prepare TSI-POSS/PU hybrid composites as a heavy linking node in backbone, respectively. The domain micro-structures of these composites were investigated by FTIR, wide angle X-ray scattering (WAXS) and molecular dynamics simulation approach. The results indicate that with TSI-POSS concentration increasing in hybrid composites, distinct crystallite clusters are formed which increase the volume of hard segments and lead to the micro-phase separation. Meanwhile, details of chain packing has been evaluated by radial distribution function, which shows that below 13wt% TSI-POSS concentration, the number of contacts between neighboring chains is decreased due to the humping semi-enclosed cage of TSI-POSS units. However, when TSI-POSS concentration is up to 22 wt%, the number of contacts is increased because the formation of crystallite cluster pulls neighboring chains closer to each other and significantly shortens their distance.