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Synthesis and characterization of pendent hydroxy fluoroesters of secondary high molecular weight guayule rubber
Author(s) -
Thames Shelby F.,
Gupta Sandhya
Publication year - 1997
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19970222)63:8<1077::aid-app15>3.0.co;2-3
Subject(s) - glass transition , natural rubber , polymer chemistry , polymer , fourier transform infrared spectroscopy , characterization (materials science) , materials science , chemistry , organic chemistry , chemical engineering , engineering , nanotechnology
The epoxidation of secondary high molecular weight guayule rubber (SHMWGR) and subsequent ring opening with fluoroacids to give hydroxyfluoroesters (FGR) is reported. Structural characterization was performed with FTIR; 1 H‐, 13 C‐, and 19 F‐NMR; and DSC. The percent epoxidation was quantitatively determined by 1 H‐NMR. It was noted that the glass transition temperatures ( T g ) of the FGR polymers increased with increasing fluoro acid content; however, reactions with longer chain, highly fluorinated acids lowered the T g . © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 63: 1077–1089, 1997