PMID- 33945193
OWN - NLM
STAT- MEDLINE
DCOM- 20210922
LR  - 20210922
IS  - 1521-3927 (Electronic)
IS  - 1022-1336 (Linking)
VI  - 42
IP  - 18
DP  - 2021 Sep
TI  - Hybridization of Step-/Chain-Growth and Radical/Cationic Polymerizations Using 
      Thioacetals as Key Components for Triblock, Periodic and Random Multiblock 
      Copolymers with Thermoresponsiveness.
PG  - e2100192
LID - 10.1002/marc.202100192 [doi]
AB  - A novel strategy for synthesizing a series of multiblock copolymers is developed 
      by combining radical/cationic step-growth polymerizations of dithiols and divinyl 
      ethers and chain-growth cationic degenerative chain-transfer (DT) polymerizations 
      of vinyl ethers using thioacetals as key components. The combination of radical 
      step-growth polymerization and a cationic thiol-ene reaction or cationic 
      step-growth polymerization enables the synthesis of a series of macro 
      chain-transfer agents (CTAs) composed of poly(thioether) and thioacetal groups at 
      different positions. The resulting products are 1) bifunctional macro CTAs with 
      thioacetal groups at both chain ends, 2) periodic macro CTAs periodically having 
      thioacetal groups in the main chain, and 3) random macro CTAs randomly having 
      thioacetal groups in the main chain. Subsequently, the obtained macro CTAs are 
      used for chain-growth cationic DT polymerization of methoxyethyl vinyl ether 
      (MOVE) to result in 1) triblock, 2) periodic, and 3) random multiblock copolymers 
      consisting of poly(thioether) and poly(MOVE) segments. All these triblock and 
      multiblock copolymers composed of hydrophobic poly(thioether) and hydrophilic 
      poly(MOVE) segments show an amphiphilic tendency to form characteristic micelles 
      in aqueous solutions. In addition, due to the thermoresponsive poly(MOVE) 
      segments, the obtained copolymers exhibit lower critical solution temperatures 
      that depend on the segment sequences and lengths.
CI  - (c) 2021 Wiley-VCH GmbH.
FAU - Uchiyama, Mineto
AU  - Uchiyama M
AUID- ORCID: 0000-0002-3521-4784
AD  - Department of Molecular and Macromolecular Chemistry, Graduate School of 
      Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan.
FAU - Osumi, Masahiro
AU  - Osumi M
AD  - Department of Molecular and Macromolecular Chemistry, Graduate School of 
      Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan.
FAU - Satoh, Kotaro
AU  - Satoh K
AUID- ORCID: 0000-0002-3105-4592
AD  - Department of Chemical Science and Engineering, School of Materials and Chemical 
      Technology, Tokyo Institute of Technology, 2-12-1-H120 Ookayama, Meguro-ku, 
      Tokyo, 152-8550, Japan.
FAU - Kamigaito, Masami
AU  - Kamigaito M
AUID- ORCID: 0000-0001-7584-5524
AD  - Department of Molecular and Macromolecular Chemistry, Graduate School of 
      Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan.
LA  - eng
GR  - JP20K15332/Japan Society for the Promotion of Science/
PT  - Journal Article
DEP - 20210504
PL  - Germany
TA  - Macromol Rapid Commun
JT  - Macromolecular rapid communications
JID - 9888239
RN  - 0 (Cations)
RN  - 0 (Micelles)
RN  - 0 (Polymers)
SB  - IM
MH  - Cations
MH  - *Micelles
MH  - Polymerization
MH  - *Polymers
OTO - NOTNLM
OT  - cationic polymerization
OT  - multiblock polymers
OT  - radical polymerization
OT  - thiol-ene reaction
OT  - vinyl ether
EDAT- 2021/05/05 06:00
MHDA- 2021/09/23 06:00
CRDT- 2021/05/04 12:48
PHST- 2021/04/24 00:00 [revised]
PHST- 2021/03/26 00:00 [received]
PHST- 2021/05/05 06:00 [pubmed]
PHST- 2021/09/23 06:00 [medline]
PHST- 2021/05/04 12:48 [entrez]
AID - 10.1002/marc.202100192 [doi]
PST - ppublish
SO  - Macromol Rapid Commun. 2021 Sep;42(18):e2100192. doi: 10.1002/marc.202100192. 
      Epub 2021 May 4.