Synthesis and characterization of carbamoylphosphonate monomer and its copolymer with styrene. II

✍ Scribed by Shi Lin; Israel Cabasso

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 275 KB
• Volume: 35
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19970415)35:5<889::aid-pola4>3.0.co;2-g

✦ Synopsis

A monomer, diethyl a,a-dimethyl-m-isopropenylbenzyl carbamoylphosphonate, has been prepared by the base-catalyzed reaction of the isocyanate m-TMI ( a,adimethyl-m-isopropenylbenzylisocyanate) with diethyl phosphite. The structure of the carbamoylphosphonate monomer and its styrene copolymer was confirmed spectroscopically, and the nature of the hydrogen bondings in the {NHC(|O)P(|O)(OR) 2 unit in the monomer and copolymer is discussed in detail. A bulk polymerization of the carbamoylphosphonate is very slow and tends to yield a crosslinked product, but a solution polymerization produced the soluble copolymers. The T g ( midpoint ) of the homopolymer is low, 67ЊC, and its capacity to complex UO 2 (NO 3 ) 2 is very high, 28 wt % (19 mol %).