Issue 43, 2020
From the journal:

RSC Advances

Binary catalytic system for homo- and block copolymerization of ε-caprolactone with δ-valerolactone†

Yan Wang,a   Yongle Hanb  and  Lifang Zhang ORCID logo *abc  

* Corresponding authors

a The Center of Analysis and Test, Shanxi Normal University, Linfen 041004, P. R. China

b School of Chemistry & Material Science, Shanxi Normal University, Linfen 041004, P. R. China

c Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Technology, Linfen 041004, P. R. China
E-mail: zhanglf0015@163.com
Tel: +86-0357-2051157

Abstract

The combined interaction of 2,3,6,7-tetrahydro-5H-thiazolo[3,2-a] pyrimidine (ITU) as the organocatalytic nucleophile with YCl3 as Lewis acid cocatalyst, generating ITU/YCl3, was employed for homo- and copolymerization of ε-caprolactone (CL) with δ-valerolactone (VL). Poly(caprolactone) (PCL) and poly(caprolactone)–poly(ethylene glycol)–poly(caprolactone) (PCL–PEG–PCL) triblock copolymer and poly(valerolactone)–poly(caprolactone)–poly(ethylene glycol)–poly(caprolactone)–poly(valerolactone) (PVL–PCL–PEG–PCL–PVL) pentablock copolymer were successfully prepared by ring-opening polymerization (ROP) of CL employing ITU/YCl3 as catalyst in the presence of benzyl alcohol (BnOH) or poly(ethylene glycol) (PEG) as initiator, respectively. The reaction was systematically optimized, and the architecture, molecular weight and thermal properties of the polymers were characterized by NMR, FTIR, SEC and DSC analyses. Finally, a plausible polymerization mechanism was proposed.

Graphical abstract: Binary catalytic system for homo- and block copolymerization of ε-caprolactone with δ-valerolactone

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Article information

DOI
https://doi.org/10.1039/D0RA04974C
Article type
Paper
Submitted
05 Jun 2020
Accepted
30 Jun 2020
First published
09 Jul 2020
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2020,10, 25979-25987

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Binary catalytic system for homo- and block copolymerization of ε-caprolactone with δ-valerolactone

Y. Wang, Y. Han and L. Zhang, RSC Adv., 2020, 10, 25979 DOI: 10.1039/D0RA04974C

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