Synthesis and characterization of poly(3,3 bis(azidomethyl)oxetane-co-ε-caprolactone)s

✍ Scribed by Jean-Jacques Jutier; Anémone De Gunzbourg; Robert E. Prud'homme

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 217 KB
• Volume: 37
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19990401)37:7<1027::aid-pola17>3.0.co;2-b

✦ Synopsis

The quasi-living cationic copolymerization of 3,3-bis(chloromethyl)oxetane (BCMO) and -caprolactone (-CL), using boron trifluoride etherate as catalyst and 1,4-butanediol as coinitiator, was investigated in methylene chloride at 0°C. The resulting hydroxyl-ended copolymers exhibit a narrow molecular weight polydispersity and a functionality of about 2. The reactivity ratios of BCMO (0.26) and -CL (0.47), and the T g of the copolymers, indicate their statistical character. The synthesis of poly(3,3bis(azidomethyl)oxetane-co--caprolactone) from poly(BCMO-co--CL) via the substitution of the chlorine atoms by azide groups, using sodium azide in DMSO at 110°C, occurs without any degradation, but the copolymers decompose at about 240°C. All polymers were characterized by vapor pressure osmometry or steric exclusion chromatography, 1 H-NMR and FTIR spectroscopies, and DSC.