PMID- 35498282
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220503
IS  - 2046-2069 (Electronic)
IS  - 2046-2069 (Linking)
VI  - 10
IP  - 9
DP  - 2020 Jan 29
TI  - Tailoring the AlCl(3)/iPr(2)O/Et(2)O initiation system for highly reactive 
      polyisobutylene synthesis in pure n-hexane.
PG  - 5183-5190
LID - 10.1039/c9ra11003h [doi]
AB  - This paper reports the flow synthesis of highly reactive polyisobutylenes 
      (HRPIBs) in pure n-hexane using properly prepared AlCl(3).Et(2)O crystals in 
      conjunction with AlCl(3).iPr(2)O solution as coinitiators. By preparing 
      AlCl(3).iPr(2)O solution and AlCl(3).Et(2)O crystals separately, the cationic 
      polymerization of isobutylene proceeded smoothly under a wide range of monomer 
      concentrations (0.33-1.30 M) in the presence of H(2)O as an initiator, affording 
      a high yield ( approximately 89%) and a moderate exo-olefin terminal group content (60-75%) in 
      10 min. The various functions of iPr(2)O and Et(2)O in the initiator solution 
      were comprehensively revealed from the polymerization results, attenuated total 
      reflection-Fourier transform infrared and (27)Al nuclear magnetic resonance 
      spectra, and density functional theory simulations. AlCl(3).iPr(2)O was confirmed 
      to be the key component that stabilized carbenium ions. The AlCl(3).Et(2)O 
      complex was the key component to promote proton elimination. Free Et(2)O should 
      be removed to inhibit its negative effect on isomerization. This new strategy may 
      lead to high commercial interest in HRPIB synthesis in pure green solvent and 
      could potentially be extended to other initiation systems containing solid Lewis 
      acids.
CI  - This journal is (c) The Royal Society of Chemistry.
FAU - Xie, Dan
AU  - Xie D
AUID- ORCID: 0000-0001-6675-6714
AD  - State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, 
      Tsinghua University Beijing 100084 China luyc@tsinghua.edu.cn +86 10 62773017 +86 
      10 62773017.
FAU - Zhu, Shan
AU  - Zhu S
AUID- ORCID: 0000-0002-0128-2041
AD  - State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, 
      Tsinghua University Beijing 100084 China luyc@tsinghua.edu.cn +86 10 62773017 +86 
      10 62773017.
FAU - Lu, Yangcheng
AU  - Lu Y
AD  - State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, 
      Tsinghua University Beijing 100084 China luyc@tsinghua.edu.cn +86 10 62773017 +86 
      10 62773017.
LA  - eng
PT  - Journal Article
DEP - 20200131
PL  - England
TA  - RSC Adv
JT  - RSC advances
JID - 101581657
PMC - PMC9049001
COIS- There are no conflicts to declare.
EDAT- 2020/01/31 00:00
MHDA- 2020/01/31 00:01
PMCR- 2020/01/31
CRDT- 2022/05/02 07:09
PHST- 2019/12/30 00:00 [received]
PHST- 2020/01/24 00:00 [accepted]
PHST- 2022/05/02 07:09 [entrez]
PHST- 2020/01/31 00:00 [pubmed]
PHST- 2020/01/31 00:01 [medline]
PHST- 2020/01/31 00:00 [pmc-release]
AID - c9ra11003h [pii]
AID - 10.1039/c9ra11003h [doi]
PST - epublish
SO  - RSC Adv. 2020 Jan 31;10(9):5183-5190. doi: 10.1039/c9ra11003h. eCollection 2020 
      Jan 29.