Synthesis and characterization of pendent hydroxy fluoroesters of secondary high molecular weight guayule rubber

✍ Scribed by Shelby F. Thames; Sandhya Gupta

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 290 KB
• Volume: 63
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970222)63:8<1077::aid-app15>3.0.co;2-3

✦ Synopsis

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 .