Conformational behaviour of linear and crosslinked poly(4-but-3-en-1-ynyl-1-methylpiperidin-4-ol) in solution

The conformational transition expanded coil to compact globule for linear and crosslinked poly(4‐but‐3‐en‐1‐ynyl‐1‐methylpiperidin‐4‐ol), poly{1‐[2‐(4‐hydroxy‐1‐methyl‐4‐piperidyl)ethynyl]ethylene}, (1) in aqueous and aqueous‐salt solutions was investigated. The free energy of the conformational tra...

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Bibliographic Details
Published in:Die Makromolekulare Chemie 1993-10, Vol.194 (10), p.2713-2718
Main Authors: Kudaibergenov, Sarkyt E., Saltybaeva, Saule S., Bekturov, Esen A., Nurkeeva, Z. S., Sigitov, V. B., Shaikhutdinov, E. M., Ermagambetov, M. F.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
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Summary:The conformational transition expanded coil to compact globule for linear and crosslinked poly(4‐but‐3‐en‐1‐ynyl‐1‐methylpiperidin‐4‐ol), poly{1‐[2‐(4‐hydroxy‐1‐methyl‐4‐piperidyl)ethynyl]ethylene}, (1) in aqueous and aqueous‐salt solutions was investigated. The free energy of the conformational transition for linear 1. n HCl was calculated. It was shown that in aqueous solution 1 is characterized by a lower critical solution temperature (LCST). The collapse of crosslinked 1 on changing the ionization state (aqueous salt solution) and temperature was observed and is similar to a phase transition.
ISSN:0025-116X
0025-116X
DOI:10.1002/macp.1993.021941006