Nanocrystallization-locked Network of Poly(styrene-<italic style="font-style: italic">b</italic>-isobutylene-<italic style="font-style: italic">b</italic>-styrene)-<italic style="font-style: italic">g</italic>-Polytetrahydrofuran Block Graft Copolymer

Hang-Tian Zhang; Zhi-Tao Wei; Fang Zhang; Tian Yang; Yi-Xian Wu

doi:10.1007/s10118-021-2536-9

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Nanocrystallization-locked Network of Poly(styrene-b-isobutylene-b-styrene)-g-Polytetrahydrofuran Block Graft Copolymer

ARTICLE | Updated：2021-01-08

- Nanocrystallization-locked Network of Poly(styrene-b-isobutylene-b-styrene)-g-Polytetrahydrofuran Block Graft Copolymer
- Chinese Journal of Polymer Science Vol. 39, Issue 7, Pages: 874-886(2021)
- Affiliations：
  
  State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Sciences and Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
- Author bio：
  
  wuyx@mail.buct.edu.cn
- Funds：
- DOI：10.1007/s10118-021-2536-9
  CLC：
- Received：13 October 2020，
  
  Revised：2020-11-21，
  
  Accepted：01 December 2020，
  
  Online First：08 January 2021，
  
  Published：14 May 2021
- Accepted：
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Zhang, H. T.; Wei, Z. T.; Zhang, F.; Yang, T.; Wu, Y. X. Nanocrystallization-locked network of poly(styrene-, b,-isobutylene-, b,-styrene)-, g,-polytetrahydrofuran block graft copolymer. Chinese J. Polym. Sci. 2021, 39, 874–886

Hang-Tian Zhang, Zhi-Tao Wei, Fang Zhang, et al. Nanocrystallization-locked Network of Poly(styrene-b-isobutylene-b-styrene)-g-Polytetrahydrofuran Block Graft Copolymer[J]. Chinese Journal of Polymer Science, 2021, 39(7): 874-886. DOI: 10.1007/s10118-021-2536-9.
Zhang, H. T.; Wei, Z. T.; Zhang, F.; Yang, T.; Wu, Y. X. Nanocrystallization-locked network of poly(styrene-, b,-isobutylene-, b,-styrene)-, g,-polytetrahydrofuran block graft copolymer. Chinese J. Polym. Sci. 2021, 39, 874–886 DOI： 10.1007/s10118-021-2536-9.

Hang-Tian Zhang, Zhi-Tao Wei, Fang Zhang, et al. Nanocrystallization-locked Network of Poly(styrene-b-isobutylene-b-styrene)-g-Polytetrahydrofuran Block Graft Copolymer[J]. Chinese Journal of Polymer Science, 2021, 39(7): 874-886. DOI: 10.1007/s10118-021-2536-9. DOI：

摘要

Abstract

Poly(styrene-

-isobutylene-

-styrene) triblock copolymer (SIBS)

a kind of thermoplastic elastomer with biocompatibility and biostability containing fully saturated soft segments

could be synthesized

via

living cationic copolymerization. A novel poly[(styrene-

-methylstyrene)-

-isobutylene-

-(styrene-

-methylstyrene)]-

-polytetrahydrofuran (M-SIBS-

-PTHF) block graft copolymer was prepared to increase the polarity and service temperature of SIBS by grafting polar PTHF segments onto SIBS. A series of the above block graft copolymers with average grafting numbers from 2 to 6 and molecular weights of PTHF branches ranging from 200 g·mol

−1

to 4200 g·mol

−1

were successfully synthesized

via

living cationic ring-opening polymerization of tetrahydrofuran (THF) coinitiated by AgClO

. The introduction of PTHF branches led to an obvious microphase separation due to thermodynamic incompatibility among the three kinds of segments of polyisobutylene (PIB)

polystyrene (PS) and PTHF. Moreover

the microphase separation promotes the rearrangement of PTHF branches to form the nanocrystallization-locked physically cross-linked network after storage at room temperature for 2 months

leading to insolubility of the copolymers even in good solvents. The melting temperature and enthalpy of PTHF nanocrystallization locked in hard domains of M-SIBS-

-PTHF-1.1k block graft copolymer increased remarkably up to 153 °C and 117.0 J·g

−1

by 23 °C and 11.6 J·g

−1

respectively after storage for long time. Storage modulus (

) is higher than loss modulus (

G''

) of M-SIBS-

-PTHF block graft copolymer at temperatures ranging from 100 °C to 180 °C

which is much higher than those of the SIBS triblock copolymer. To the best of our knowledge

this is the first example of high performance M-SIBS-

-PTHF block graft copolymers containing segments of PIB

PS and PTHF with nanocrystallization-locked architecture.

关键词

Keywords

references

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⁰

Nanocrystallization-locked Network of Poly(styrene-b-isobutylene-b-styrene)-g-Polytetrahydrofuran Block Graft Copolymer

DOI：10.1007/s10118-021-2536-9

摘要

Abstract

关键词

Keywords

references