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Cloud point of poly(N-isopropylacrylamide) synthesized in the presence of cyclodextrin

✍ Scribed by Seung Jun Han; Mi Kyong Yoo; Yong Kiel Sung; Young Moo Lee; Chong Su Cho

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
406 KB
Volume
19
Category
Article
ISSN
1022-1336

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✦ Synopsis

Polymerization of N-isopropylacrylamide (NIPAAm) was performed in the presence of P-cyclodextrin (B-CD) [or hydroxypropyl-/3-cyclodextrin (HOP-P-CD)]. The formation of an inclusion complex between PNIPAAm and p-CD was confirmed by FT-IR, 'H N M R and 2D-NOESY NMR. It was found that the cloud point (CP) of poly(N-isopropylamide) (PNIPAAm) in the PNIPAAm/P-CD complex in aqueous solution increased up to about 57 "C whereas that in the PNIPAAm/P-CD blend is about 33 "C. The CP of PNIPAAm in the PNIPAAdP-CD complex is higher than that in the PNIPAAmMIOP-P-CD inclusion complex. E R and NMR results suggest that P ~P A A m chains are included in CD cavities.

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