scholarly journals Synthesis of Amphiphilic Statistical Copolymers Bearing Methoxyethyl and Phosphorylcholine Groups and Their Self-Association Behavior in Water

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1808
Author(s):  
Thi Lien Nguyen ◽  
Yuuki Kawata ◽  
Kazuhiko Ishihara ◽  
Shin-ichi Yusa
Keyword(s):  
Hydrodynamic Radius ◽  
Critical Aggregation Concentration ◽  
Reactivity Ratios ◽  
Monomer Reactivity Ratios ◽  
Pyrene Fluorescence ◽  
Association Behavior ◽  
Self Association

Biocompatible amphiphilic statistical copolymers P(MEA/MPCm) composed of 2-methoxyethyl acrylate (MEA) and 2-methacryloyloxyethyl phosphorylcholine (MPC) were prepared with three different mol% of the hydrophilic unit MPC (m = 6, 12 and 46 mol%). The monomer reactivity ratios of MEA (rMEA) and MPC (rMPC) were 0.53 and 2.21, respectively. The rMEA × rMPC value of 1.17 demonstrated that statistical copolymerization was successful. P(MEA/MPC12) and P(MEA/MPC46) copolymers did not undergo aggregation in water, whereas the P(MEA/MPC6) copolymer formed micelles in water with a hydrodynamic radius (Rh) of 96.9 nm and a critical aggregation concentration, which was determined using pyrene fluorescence, at 0.0082 g/L. The restricted motion of the protons in the hydrophobic MEA units in the micelles’ cores provided additional evidence of self-association in P(MEA/MPC6).

Copolymers of 4-nitrophenyl acrylate with styrene: Synthesis, characterization and monomer reactivity ratios

1996 ◽  
Vol 32 (1) ◽  
pp. 105-109 ◽  
Author(s):  
S. Thamizharasi ◽  
P. Gnanasundaram ◽  
K.Venkata Rao ◽  
A.Venkata Rami Reddy
Keyword(s):  
Reactivity Ratios ◽  
Monomer Reactivity Ratios

Radical copolymerization of acrylic acid and OEGMA475: Monomer reactivity ratios and structural parameters of the copolymer

2014 ◽  
Vol 22 (12) ◽  
pp. 1330-1336 ◽  
Author(s):  
Hossein Abdollahi ◽  
Vahid Najafi ◽  
Farshid Ziaee ◽  
Kourosh Kabiri ◽  
Farhad Narimani
Keyword(s):  
Acrylic Acid ◽  
Structural Parameters ◽  
Radical Copolymerization ◽  
Reactivity Ratios ◽  
Monomer Reactivity Ratios

scholarly journals Copolymerization of 4-Acetylphenyl Methacrylate with Ethyl Methacrylate: Synthesis, Characterization, Monomer Reactivity Ratios, and Thermal Properties

2014 ◽  
Vol 2014 ◽  
pp. 1-10
Author(s):  
Gamze Barim ◽  
Mustafa Gokhun Yayla
Keyword(s):  
Thermal Stability ◽  
Nonlinear Least Squares ◽  
Reactivity Ratios ◽  
Spectroscopic Techniques ◽  
Monomer Reactivity Ratios ◽  
Scanning Calorimetry ◽  
Ethyl Methacrylate ◽  
Wide Range ◽  
Monomer Feed ◽  
Copolymer Poly

Methacrylates have high glass transition temperature (Tg) values and high thermal stability. A new methacrylate copolymer, poly(4-acetylphenyl methacrylate-co-ethyl methacrylate) (APMA-co-EMA), was synthesized. The thermal behaviors of copolymers were investigated by differential scanning calorimetry and thermogravimetric analysis. They behaved as new single polymers with singleTg’s and the thermal stability of the copolymers increased with increasing 4-acetylphenyl methacrylate (APMA) fraction, leading to the manufacture of copolymers with desiredTgvalues. Structure and composition of copolymers for a wide range of monomer feed ratios were determined by Fourier transform infrared (FT-IR) and1H-nuclear magnetic resonance (1H-NMR) spectroscopic techniques. Copolymerization reactions were continued up to 40% conversions. The monomer reactivity ratios for copolymer system were determined by the Kelen-Tüdös (ra(APMA)=0.81;rb(EMA)=0.61) and extended Kelen-Tüdös (ra=0.77;rb=0.54) methods and a nonlinear least squares (ra=0.74;rb=0.49) method.

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