๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Temperature-induced phase transition of poly(N,N-dimethylaminoethyl methacrylate-co-acrylamide)

โœ Scribed by Sun Hang Cho; Mu Shik Jhon; Soon Hong Yuk; Hai Bang Lee

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
115 KB
Volume
35
Category
Article
ISSN
0887-6266

No coin nor oath required. For personal study only.

โœฆ Synopsis

Copolymers of N,N-dimethylaminoethyl methacrylate (DMAEMA) and acrylamide (AAm) were prepared to demonstrate a temperature-induced phase transition. Poly DMAEMA has a lower critical solution temperature (LCST) around 50ะŠC in water. With copolymerization of DMAEMA with AAm, the LCST shifts to the lower temperature was observed, probably due to the formation of hydrogen bonds between amide and N,N-dimethylamino groups. FT-IR studies clearly show the formation of hydrogen bonds which protect N,N-dimethylamino groups from exposure to water and result in a hydrophobic contribution to the LCST.

๐Ÿ“œ SIMILAR VOLUMES

Temperature-induced phase transition of
Temperature-induced phase transition of poly(N-n-propylacrylamide-co-butyl methacrylate-co-N,N-diethylaminoethyl methacrylate)
โœ Soo Young Park; Joong Hwan Yang; Soon Hong Yuk; Mu Shik Jhon ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 123 KB ๐Ÿ‘ 1 views

Terpolymers composed of N-n-propylacrylamide (NPAAm), butyl methacrylate (BMA), and N,N-diethylaminoethyl methacrylate (DEAEMA) were prepared in an attempt to investigate the temperature-induced phase transition and its mechanism. Poly(NPAAm) showed the lower critical solution temperature (LCST) aro