THERMO-RESPONSIVE BLOCK COPOLYMERS BASED ON LINEAR-TYPE POLY(ETHYLENE GLYCOL): TUNABLE LCST WITHIN THE PHYSIOLOGICAL RANGE

Guo-liang Yue; Qian-ling Cui; Yu-xi Zhang; Er-jian Wang; Fei-peng Wu

doi:10.1007/s10118-012-1179-2

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THERMO-RESPONSIVE BLOCK COPOLYMERS BASED ON LINEAR-TYPE POLY(ETHYLENE GLYCOL): TUNABLE LCST WITHIN THE PHYSIOLOGICAL RANGE

NOTES | Updated：2023-01-03

- THERMO-RESPONSIVE BLOCK COPOLYMERS BASED ON LINEAR-TYPE POLY(ETHYLENE GLYCOL): TUNABLE LCST WITHIN THE PHYSIOLOGICAL RANGE
- Chinese Journal of Polymer Science Vol. 30, Issue 5, Pages: 770-776(2012)
- Affiliations：
  
  a.Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China,
  b.Graduate School of Chinese Academy of Sciences, Beijing 100049, China
- Author bio：
  
  *Fei-peng Wu (吴飞鹏), E-mail: fpwu@mail.ipc.ac.cn
- Funds：
- DOI：10.1007/s10118-012-1179-2
  CLC：
- Received：16 March 2012，
  
  Revised：2012-05-07，
  
  Accepted：08 May 2012，
  
  Published：2012-09
- Accepted：
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Guo-liang Yue, Qian-ling Cui, Yu-xi Zhang, et al. THERMO-RESPONSIVE BLOCK COPOLYMERS BASED ON LINEAR-TYPE POLY(ETHYLENE GLYCOL): TUNABLE LCST WITHIN THE PHYSIOLOGICAL RANGE[J]. Chinese Journal of Polymer Science, 2012, 30(5): 770-776.
DOI：

Guo-liang Yue, Qian-ling Cui, Yu-xi Zhang, et al. THERMO-RESPONSIVE BLOCK COPOLYMERS BASED ON LINEAR-TYPE POLY(ETHYLENE GLYCOL): TUNABLE LCST WITHIN THE PHYSIOLOGICAL RANGE[J]. Chinese Journal of Polymer Science, 2012, 30(5): 770-776. DOI： 10.1007/s10118-012-1179-2.

摘要

Abstract

Thermo-responsive block copolymers poly(ethylene glycol)-

block

-poly(

-acryloyl-2

2-dimethyl-1

3-oxazolidine)

PEG-

-PADMO

based on linear PEG were prepared

via

a versatile reversible addition-fragmentation chain transfer (RAFT) polymerization. PEG

(

= 1000) was used as the hydrophilic component

whose dehydration was the main driving force for the phase transition of these copolymers

as demonstrated by the

H-NMR spectra. Their lower critical solution temperatures (LCSTs) could be tuned in the range of 20℃ to 35℃

by adjusting the degree of polymerization (DP) of PADMO between 14–27. Furthermore

a sharp phase transition at ca. 33℃

close to the physiological temperature with minimal hysteresis

was observed for the PEG

-PADMO

copolymer. Moreover

excellent reversibility and reproducibility were displayed for the same copolymer over 10 cycles of repeated temperature change between 25℃ (below the LCST) and 40℃ (above the LCST).

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