Cyclodextrins in Polymer Synthesis: Photoinitiated Free-Radical Polymerization of N-Isopropylacrylamide in Water Initiated by a Methylated β-Cyclodextrin/2-Hydroxy-2-methyl-1-phenylpropan-1-one Host/Guest Complex

• Published in: Macromolecular rapid communications. Vol. 23; no. 1; pp. 55 - 58
• Main Authors: Alupei, Iulian Corneliu, Alupei, Valentina, Ritter, Helmut
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag GmbH 09.01.2002; WILEY‐VCH Verlag GmbH; Wiley
• Subjects: Applied sciences; cyclodextrins; Exact sciences and technology; host-guest systems; photopolymerization; Physical Sciences; Physicochemistry of polymers; Polymer Science; Polymerization; Polymers and radiations; radical polymerization; Science & Technology; photopolymerization; MONOMERS; host-guest systems; BETA-CYCLODEXTRIN; HOST; ACRYLATE; STYRENE; cyclodextrins; COPOLYMERIZATION; radical polymerization; Cyclodextrin; Photopolymerization; Acetophenone derivatives; Priming activity; Ketol; Hydrophobic compound; Aqueous solution; Experimental study; Complexes; Acrylamide derivative polymer; Solution polymerization; Photoinitiator
• ISSN: 1022-1336; 1521-3927
• DOI: 10.1002/1521-3927(20020101)23:1<55::AID-MARC55>3.0.CO;2-I

Methylated β‐cyclodextrin (Me‐β‐CD) was used to complex a free‐radical photoinitiator, 2‐hydroxy‐2‐methyl‐1‐phenylpropan‐1‐one (1), yielding the water‐soluble 1 : 1 host/guest complex 1 a. The structure of complex 1 a was verified by means of IR, UV/vis and 1H NMR spectroscopy. The influence of Me‐β‐CD as the host on the photopolymerization kinetics of N‐isopropylacrylamide was studied. Compared to the photopolymerization carried out under nearly identical conditions but without cyclodextrin, an increase in the polymerization rate was registered in the presence of complex 1 a.