期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 115, 期 1, 页码 263-268出版社
JOHN WILEY & SONS INC
DOI: 10.1002/app.31096
关键词
polyurethane; thermal analysis; x-ray diffraction
Fourier Transformed Infrared Spectroscopy, Thermogravimetric Analysis, and X-ray Diffractometry have been used to investigate the rigid, semi rigid, and soft polyurethane (PU) forms, which were developed by the Group of Analytic Chemistry and Technology of Polymers - USF - Sao Carlos. The -NCO/-OH ratios were 0.6, 0.5, and 0.3% for rigid, semi rigid, and soft PUs, respectively, showing that different ratios cause differences in thermal behaviors and crystalline structures of the synthesized PU resins. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 115: 263-268, 2010
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