scholarly journals Simplification of the synthesis of the raft agent 2-(2-cyanopropyl)-dithiobenzoate

2010 ◽  
Vol 75 (12) ◽  
pp. 1711-1719 ◽  
Author(s):  
Milos Milovanovic ◽  
Milena Avramovic ◽  
Lynne Katsikas ◽  
Ivanka Popovic
Keyword(s):  
Molecular Weight ◽  
Methyl Methacrylate ◽  
Standard Method ◽  
Chain Transfer ◽  
Poly Methyl Methacrylate ◽  
Reversible Addition ◽  
Raft Agent ◽  
Excellent Control ◽  
Simplified Procedure

The general literature procedure for the preparation of the reversible addition-fragmentation chain transfer (RAFT) agent 2-(2- cyanopropyl)-dithiobenzoate (CPDB) was modified by omitting the recrystallisation of the intermediate di(thiobenzoyl)disulphide. The yield of the CPDB in the simplified synthesis was increased four times comparing to the standard one. The behaviour of the CPDB obtained by the modified procedure and by the standard one in the polymerisation of methyl methacrylate was investigated. The CPDB synthesized by the simplified procedure showed itself to be a good RAFT agent, giving excellent control over the polymerisation of methyl methacrylate and it behaved in the same manner as the CPDB prepared by the standard method. The obtained poly(methyl methacrylate) had a narrow molecular weight distibution (PD=1.1).

scholarly journals The thermal stability of poly(methyl methacrylate) prepared by raft polymerisation

2008 ◽  
Vol 73 (8-9) ◽  
pp. 915-921 ◽  
Author(s):  
Lynne Katsikas ◽  
Milena Avramovic ◽  
Betancourt Cortés ◽  
Milos Milovanovic ◽  
Melina Kalagasidis-Krusic ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Methyl Methacrylate ◽  
Chain Transfer ◽  
Double Bonds ◽  
Poly Methyl Methacrylate ◽  
Reversible Addition ◽  
Raft Agent ◽  
Thermal Stability Of

Poly(methyl methacrylate), PMMA, was prepared by reversible addition-fragmentation chain transfer, RAFT, polymerisation using 2-(2-cyanopropyl)-dithiobenzoate, CPDB, as the RAFT agent. The thermal stability of the resulting polymer approached that of anionically prepared PMMA, as determined by thermogravimetry. This was the consequence of the RAFT prepared polymer having no head-to-head links and no chain end double bonds, which are responsible for the relatively low thermal stability of radically prepared PMMA.

Synthesis of Poly(Methyl Methacrylate)-Based Polyrotaxane via Reversible Addition–Fragmentation Chain Transfer Polymerization

2020 ◽  
Vol 9 (12) ◽  
pp. 1853-1857
Author(s):  
Yu-Cheng Wang ◽  
Rina Maeda ◽  
Gergely Kali ◽  
Hideaki Yokoyama ◽  
Gerhard Wenz ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Chain Transfer ◽  
Poly Methyl Methacrylate ◽  
Reversible Addition ◽  
Chain Transfer Polymerization

scholarly journals Synthesis and characterization of triphenylamine and Bbis(indolyl)methane center-functionalized polymer via reversible addition-fragmentation chain transfer polymerization

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Jie Xu ◽  
Wei Shang ◽  
Jian Zhu ◽  
Zhenping Cheng ◽  
Nianchen Zhou ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Chloroform Solution ◽  
Monomer Conversion ◽  
Benzyl Ester ◽  
Chain Extension ◽  
Reversible Addition ◽  
Raft Agent ◽  
Cyclic Voltammetry Method

AbstractA novel bis-functional reversible addition-fragmentation chain transfer (RAFT) agent bearing triphenylamine (TPA) and bis(indolyl)methane (BIM) groups, {4-[bis(1-carbodithioic acid benzyl ester-indol-3-yl)methyl]phenyl}diphenylamine (BCIMPDPA), was synthesized and successfully used as the RAFT agent to mediate the polymerization of styrene (St). The polymerization results showed that reversible addition-fragmentation chain transfer (RAFT) polymerization of St could be well controlled. The kinetic plot showed it was of first order and the numberaverage molecular weight (Mn(GPC)) of the polymer measured by GPC increased linearly with monomer conversion, simultaneously, the molecular weight distribution of the polymer was also relatively narrow. In addition, the existence of the TPA and BIM groups in the middle of polymer chain was confirmed by chain extension reaction and 1H NMR spectrum. The optical properties of the functionalized polystyrene (PS) in chloroform solution were also investigated. Furthermore, the redox process of the RAFT agent and the functionalized PS were studied by cyclic voltammetry method.

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