1991 Fiscal Year Final Research Report Summary

Development of Ring-Opening-Closing Alternating Copolymerization

Research Project

Project/Area Number	02650658
Research Category	Grant-in-Aid for General Scientific Research (C)
Allocation Type	Single-year Grants
Research Field	高分子合成
Research Institution	Tohoku University
Principal Investigator	SHODA Shin-ichiro Tohoku Univ. Fac. of Engineering Associate Professor, 工学部, 助教授 (10143364)
Project Period (FY)	1990 – 1991
Keywords	Ring-Opening-Closing Alternating Copolymerization / Ring-Opening Monomer / Ring-Closing Monomer / Trivalent Phosphorus Compound / Muconic Acid / 2-Oxazoline / Acrylic Anhydride / N-Methyldiacrylamide
Research Abstract	It has been found that the copolymerizations of cyclic phosphonites with muconic acid undergo the ring-opening-closing alternating copolymerization without initiator to give alternating copolymers. N-methyldi(meth)acrylamide reacted with cyclic phosphonites without added initiator to give 1 : 1 alternating copolymers. The first step of the reaction is formation of a zwitterion by a Michael-type addition of the phosphonite to acrylamide, followed by a ring-closing process via an intramolecular-type addition, the next step is the reaction between two genetic zwitterions in which the phosphonium ring is opening by nucleophilic attack of the anion from another zwitterion according to an Arbuzov type of ring-opening.

(2 results)