Synthesis and Characterization of Segmented Polyurethanes Containing Polyhedral Oligomeric Silsesquioxanes Nanostructured Molecules-Reference-Cited by-同舟云学术

Synthesis and Characterization of Segmented Polyurethanes Containing Polyhedral Oligomeric Silsesquioxanes Nanostructured Molecules

Published:2000-12 Issue:4 Volume:12 Page:565-571
ISSN:0954-0083
Container-title:High Performance Polymers
language:en
Short-container-title:High Performance Polymers

Author:

Fu Bruce X¹,Zhang Wenhua²,Hsiao Benjamin S¹,Rafailovich Miriam,Sokolov Jonathan²,Johansson Gary,Sauer Bryan B³,Phillips Shawn,Balnski Rusty⁴

Affiliation:

1. Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794-3400, USA

2. Department of Materials Science and Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794-3400, USA

3. Central Research and Development, E I DuPont de Nemours and Company, Wilmington, DE 19880, USA

4. Propulsion Directorate, Air Force Research Laboratory, Edwards Air Force Base, CA 93524-7680, USA

Abstract

Segmented polyurethanes based on diphenylmethane-4,4′-diisocyanate and polytetra-methylene glycol were synthesized using a mixture of polyhedral oligomeric silsesquioxane (POSS)-diol and 1,4-butanediol as chain extenders. The polymers were characterized by differential scanning calorimetry, wide-angle x-ray diffraction (WAXD), small-angle x-ray scattering (SAXS) and tensile property tests. Microphase separation between the hard and soft segment domains was observed in all the samples by SAXS. The increase of the POSS concentration was found to weaken the microphase separation between the domains and increase the Tg of the soft segments. The WAXD results showed that when the POSS concentration was greater than 10 wt%, the 101 diffraction peak from the POSS crystals could be observed, which suggested the formation of POSS nanocrystals in the hard domain. The tensile property tests showed that polyurethanes containing the nanostructured POSS molecules had higher moduli, but lower maximum elongation ratios.

Publisher

SAGE Publications

Subject

Materials Chemistry,Organic Chemistry,Polymers and Plastics

Link

http://journals.sagepub.com/doi/pdf/10.1088/0954-0083/12/4/311

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