NMR characterization of sodium carboxymethyl cellulose: Substituent distribution and mole fraction of monomers in the polymer chains

2016 ◽  
Vol 146 ◽  
pp. 1-9 ◽  
Author(s):  
Hiroyuki Kono ◽  
Kazuhiro Oshima ◽  
Hisaho Hashimoto ◽  
Yuuichi Shimizu ◽  
Kenji Tajima
Keyword(s):  
Mole Fraction ◽  
Carboxymethyl Cellulose ◽  
Polymer Chains ◽  
Sodium Carboxymethyl Cellulose ◽  
Substituent Distribution ◽  
Nmr Characterization

RAFT Polymerization of Styrene Using Dithioester with Anthracene Z Group as Chain Transfer Agent

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Zhou Nianchen ◽  
Zhu Jian ◽  
Zhang Zhengbiao ◽  
Zhu Xiulin
Keyword(s):  
Raft Polymerization ◽  
Controlled Radical Polymerization ◽  
Polymer Chains ◽  
Chain Extension ◽  
Enhanced Fluorescence ◽  
H Nmr ◽  
Nmr Characterization ◽  
Raft Agent ◽  
Living Controlled Radical Polymerization

AbstractA novel dithioester, bearing anthracene as Z group, benzyl anthracene-10-carbodithioate (BAC) was successfully synthesized and used as the RAFT agent for the RAFT polymerizations of styrene (St). The results indicated that the polymerization presented the characteristics of “living”/controlled radical polymerization. 1H NMR characterization of obtained polystyrene confirmed that most of the polymer chains were end-capped by the anthracene moiety. The successful chain extension experiment further demonstrated the “living” character of the polymer. The fluorescence investigation of the polymers contained an anthrancene moiety of BAC in the chain end expressed enhanced fluorescence property than that of BAC in CHCl3 solution.

scholarly journals Copolymer chain formation of 2-oxazolines by in situ1H-NMR spectroscopy: dependence of sequential composition on substituent structure and monomer ratios

RSC Advances ◽  
2021 ◽  
Vol 11 (18) ◽  
pp. 10468-10478
Author(s):  
Sabina Abbrent ◽  
Andrii Mahun ◽  
Miroslava Dušková Smrčková ◽  
Libor Kobera ◽  
Rafał Konefał ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Polymer Chains ◽  
Chain Formation ◽  
Molar Ratios ◽  
H Nmr ◽  
Copolymer Chain ◽  
Nmr Characterization ◽  
Insight Into

In situ1H NMR characterization of copolymerization reactions of various 2-oxazoline monomers at different molar ratios offers detailed insight into the build-up and composition of the polymer chains.

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