Synthetic methodology effect on the microstructure and thermal properties of poly(n-butyl acrylate-co-methyl methacrylate) synthesized by nitroxide mediated polymerization

2011 ◽  
Vol 2 (8) ◽  
pp. 1769 ◽  
Author(s):  
Nabila Cherifi ◽  
Adeline Issoulie ◽  
Abdel Khoukh ◽  
Ahmed Benaboura ◽  
Maud Save ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Methyl Methacrylate ◽  
Butyl Acrylate ◽  
Synthetic Methodology ◽  
Nitroxide Mediated Polymerization

Nitroxide-Mediated Polymerization of Styrene, Butyl Acrylate, or Methyl Methacrylate by Microflow Reactor Technology

Synthesis ◽  
2012 ◽  
Vol 44 (16) ◽  
pp. 2555-2559 ◽  
Author(s):  
Ilhyong Ryu ◽  
Armido Studer ◽  
Takahide Fukuyama ◽  
Yoshito Kajihara
Keyword(s):  
Methyl Methacrylate ◽  
Butyl Acrylate ◽  
Reactor Technology ◽  
Microflow Reactor ◽  
Nitroxide Mediated Polymerization

scholarly journals Synthesis of poly (n-butyl acrylate) with tempo by nitroxide mediated polymerization method

2021 ◽  
pp. 096739112110245
Author(s):  
Amrita Sharma ◽  
PP Pande
Keyword(s):  
Butyl Acrylate ◽  
Low Cost ◽  
Polymerization Process ◽  
Polymerization Reaction ◽  
High Concentration ◽  
Acrylate Monomer ◽  
Controlled Polymerization ◽  
Acrylate Monomers ◽  
Nitroxide Mediated Polymerization ◽  
Polymerization Method

It has been observed that acrylate monomers are very difficult to polymerize with the low cost nitroxide catalyst 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO). Therefore, costly acyclic nitroxides such as N-tert-butyl-N-(1-diethylphosphono-2,2-dimethyl)-N-oxyl, (SG1), 2,2,5-Trimethyl-4-phenyl-3-azahexane-3-nitroxide (TIPNO) and TIPNO derivatives have to be used for the polymerization of the acrylic acid derivatives. There are very few reports on the use of TEMPO-derivatives toward the polymerization of n-butyl acrylate. Generally different reducing agents viz. glucose, ascorbic acid, hydroxyacetone etc. have been used to destroy excess TEMPO during the polymerization reaction. The acrylate polymerizations fail in the presence of TEMPO due to the strong C–O bond formed between the acrylate chain end and nitroxide. To the best of our knowledge, no literature report is available on the use of TEMPO without reducing agent or high temperature initiators, toward the polymerization of n-butyl acrylate. The present study has been carried out with a view to re-examine the application of low cost nitroxide TEMPO, so that it can be utilized towards the polymerization of acrylate monomers (e.g. n-butyl acrylate). We have been able to polymerize n-butyl acrylate using the nitroxide TEMPO as initiator (via a macroinitiator). In this synthesis, a polystyrene macroinitiator was synthesized in the first step from TEMPO, after this TEMPO end-capped styrene macroinitiator (PSt-TEMPO) is used to polymerize n-butyl acrylate monomer. The amount of macroinitiator taken was varied from 0.05% to 50% by weight of n-butyl acrylate monomer. The polymerization was carried out at 120°C by bulk polymerization method. The experimental findings showed a gradual increase in molecular weight of the polymer formed and decrease in the polydispersity index (PDI) with increase in amount of PSt-TEMPO macroinitiator taken. In all experiments conversion was more than 80%. These results indicate that the polymerization takes place through controlled polymerization process. Effect of different solvents on polymerization has also been investigated. In the following experiments TEMPO capped styrene has been used as macroinitiator leading to the successful synthesis of poly n-Butyl acrylate. It has been found that styrene macroinitiator is highly efficient for the nitroxide mediated polymerization, even in very small concentration for the synthesis of poly n-butyl acrylate. High concentration of macroinitiator results in the formation of block copolymers of polystyrene and poly ( n-butyl acrylate) viz. polystyrene-block-poly-( n-butyl acrylate). The use of TEMPO toward controlled polymerization is of much importance, because it is the nitroxide commercially available at the lowest cost.

Effect of needle diameter on nanofiber diameter and thermal properties of electrospun poly(methyl methacrylate)

2007 ◽  
Vol 18 (3) ◽  
pp. 180-183 ◽  
Author(s):  
Javier Macossay ◽  
Alexis Marruffo ◽  
Roman Rincon ◽  
Tom Eubanks ◽  
Anxiu Kuang
Keyword(s):  
Thermal Properties ◽  
Methyl Methacrylate ◽  
Poly Methyl Methacrylate ◽  
Nanofiber Diameter ◽  
Needle Diameter
Sign in / Sign up

Export Citation Format

Share Document