Morphology Evolution of Polystyrene-core/Poly(<italic style="font-style: italic">N</italic>-isopropylacrylamide)-shell Microgel Synthesized by One-pot Polymerization

Wen-tao Hu; Hua Yang; He Cheng; Hai-qing Hu

doi:10.1007/s10118-017-1969-7

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Morphology Evolution of Polystyrene-core/Poly(N-isopropylacrylamide)-shell Microgel Synthesized by One-pot Polymerization

Papers | Updated：2021-02-18

- Morphology Evolution of Polystyrene-core/Poly(N-isopropylacrylamide)-shell Microgel Synthesized by One-pot Polymerization
- Chinese Journal of Polymer Science Vol. 35, Issue 9, Pages: 1156-1164(2017)
- Affiliations：
  
  a.Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
  b.China Spallation Neutron Source(CSNS), Institute of High Energy Physics(IHEP), Chinese Academy of Sciences(CAS), Dongguan 523803, China
  c.Dongguan Institute of Neutron Science(DINS), Dongguan 523808, China
- Author bio：
  
  He Cheng (程贺), E-mail:chenghe@ihep.ac.cn
  Hai-qing Hu (胡海青), E-mail:hhq@qust.edu.cn
- Funds：
- DOI：10.1007/s10118-017-1969-7
  CLC：
- Received：02 March 2017，
  
  Revised：2017-3-29，
  
  Accepted：20 April 2017，
  
  Published：05 September 2017
- Accepted：
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Wen-tao Hu, Hua Yang, He Cheng, et al. Morphology Evolution of Polystyrene-core/Poly(N-isopropylacrylamide)-shell Microgel Synthesized by One-pot Polymerization[J]. Chinese Journal of Polymer Science, 2017, 35(9): 1156-1164. DOI: 10.1007/s10118-017-1969-7.
DOI：

Wen-tao Hu, Hua Yang, He Cheng, et al. Morphology Evolution of Polystyrene-core/Poly(N-isopropylacrylamide)-shell Microgel Synthesized by One-pot Polymerization[J]. Chinese Journal of Polymer Science, 2017, 35(9): 1156-1164. DOI: 10.1007/s10118-017-1969-7. DOI：

摘要

Abstract

One-pot polymerization with macroinitiator is supposed to be a robust

facile way to synthesize well-defined core-shell nanoparticles with fixed shell thickness. To testify this

we investigated the temperature-depending morphology evolution of polystyrene (PS) core/poly(

-isopropylacrylamide) (PNIPAM) shell microgel synthesized by one-pot polymerization with PNIPAM-RAFT as macroinitiator in dimethylformamide (DMF) by transmission electron microscopy (TEM)

dynamic/static light scattering (DLS/SLS) and small angle neutron scattering (SANS). It is revealed that the microgel has a core-shell structure

i.e.

the core is made of pure PS

but the shell is composed of both PNIPAM-RAFT macroinitiator and crosslinked PS. In fact

there are 92.0 wt% D

6.7 wt% PNIPAM and 1.3 wt% PS in the shell in its aqueous dispersion at 21℃; therefore

its shell thickness is much larger than the extended chain length of the macroinitiator as revealed by both SANS and DLS observations. Competitive growth of styrene

divinylbenzene and PNIPAM macroinitiator as well as possible chain transfer from amine proton of PNIPAM side chain may lead to the larger shell thickness

compared with the extended chain length of the macroinitiator. Our work can shed light on the real morphology control in one-pot polymerization.

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Morphology Evolution of Polystyrene-core/Poly(N-isopropylacrylamide)-shell Microgel Synthesized by One-pot Polymerization

DOI：10.1007/s10118-017-1969-7

摘要

Abstract

关键词

Keywords

references