Chemical Journal of Chinese Universities ›› 2020, Vol. 41 ›› Issue (11): 2545-2552.doi: 10.7503/cjcu20200387

• Polymer Chemistry • Previous Articles     Next Articles

Controllable Synthesis of Amphiphilic Block Copolymer PMnEOS-b-PAA and co-Assembly Morphologies of PMDEOS-b-PAA/PS-b-PAA

SHI Xiaoyu1,2, WANG Songmeng1, LIU Lingyan1(), CHANG Weixing1, LI Jing1   

  1. 1.State Key Laboratory of Elemento?Organic Chemistry,College of Chemistry
    2.Key Laboratory of Functional Polymer Materials of the Ministry of Education,Nankai University,Tianjin 300071,China
  • Received:2020-06-23 Online:2020-11-10 Published:2020-11-06
  • Contact: LIU Lingyan E-mail:liulingyan@nankai.edu.cn
  • Supported by:
    Supported by the Natural Science Foundation of Tianjin City, China(17JCZDJC37300)

Abstract:

The co-assembly of polymers has attracted increasing attention due to the ability of generating diverse assembly morphology. This paper describes the synthesis and self-assembly of several novel amphiphilic block copolymers(PMnEOS-b-PAA, n=1—3) as well as co-assembly of PMDEOS-b-PAA with typical polystyrene-b-polyacrylic acid(PS-b-PAA). Namely, these block copolymers were fabricated by reversible addition fragmentation chain transfer(RAFT) polymerization of functionalized styrene bearing different glycol units on the para-position and acrylic acid, and characterized by 1H nuclear magnetic resonance spectrum(1H NMR). The thermo-responsive and pH-responsive properties of these block copolymers were then investigated, and they showed good thermo- and pH- responsiveness. Furthermore, as a comparison, the self-assembly actions of these block copolymers were also examined in tetrahydrofuran(THF)/H2O and THF/toluene(PhMe), respectively. It was found that the different block copolymers with different glycol units displayed various morphologies, especially in two different solvent systems. More interestingly, the co-assembly action of PMDEOS-b-PAA/PS-b-PAA(mass ratio 1∶1) in a mixture of THF-PhMe(volume ratio 2∶1) was detaily studied and a new spherical nanoparticle with uniformly distributed internal channel and smooth surface was found. Also, thisco-assembly morphology could be well repeated. The corresponding self- and co-assembly mechanisms were also proposed. This novel co-assembly mode would have potential application for further supporting catalysts, small molecules recognition and release in industry.

Key words: Amphiphilic block copolymer, co-Assembly morphology, Assemble mechanism, pH-Responsiveness, thermo-Responsiveness

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