Conventional and atom transfer radical copolymerization of phenoxycarbonylmethyl methacrylate-styrene and thermal behavior of their copolymers

Barim, Gamze; Demirelli, Kadir; Çoşkun, Mehmet

doi:10.3144/expresspolymlett.2007.76

Cited by 7 publications

(6 citation statements)

References 30 publications

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“…The most common method to determine the copolymer composition is 1 H NMR technique. 29 Copolymer compositions determined by 1 H NMR are given in Table 1. The ratio of the rates of entry of the comonomers is given by the Mayo-Lewis copolymerization equation.…”

Section: Resultsmentioning

confidence: 99%

Methacrylate Polymers Having Pendant Chalcone Moieties: Monomer Reactivity Ratios, Thermal and Optical Properties

Barim¹,

Altun²,

Yayla³

2015

Polymer Korea

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A new methacrylate copolymer that includes chalcone as a side group, poly(4-methacryloyloxyphenyl-4'-methoxystyryl ketone-co-styrene) was synthesized by free radical copolymerization. FTIR and 1 H NMR spectroscopic techniques were used to characterize the homopolymers and copolymers. The copolymerizations were carried out to high conversions. Copolymer compositions were established by 1 H NMR spectra analysis. The monomer reactivity ratios for copolymer system were determined by the linearized Kelen Tüdös, and Extended Kelen Tüdös methods and a non-linear least squares method. The molecular weights and polydispersity index of copolymers were measured by using the gel permeation chromatography (GPC). The effect of copolymer compositions on their thermal behavior were studied by differential scanning calorimetry and thermogravimetric analysis methods. The optical properties of the resulting copolymer were also investigated.

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Section: Resultsmentioning

confidence: 99%

Methacrylate Polymers Having Pendant Chalcone Moieties: Monomer Reactivity Ratios, Thermal and Optical Properties

Barim¹,

Altun²,

Yayla³

2015

Polymer Korea

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“…Copolymer compositions determined by NMR technique [27] are given in the eighth and ninth columns of Table 1 and IR technique [34] is given in the tenth and eleventh columns of Table 1. The slight discrepancies between the solution NMR and solid state FTIR measurements can be attributed to inhomogeneity of the solid sample and other measurement errors.…”

Section: Resultsmentioning

confidence: 99%

“…The chemical composition of the copolymers and distribution of the monomer units on the chain depend on their incorporation rates which in turn depend on their reactivity ratios. Monomer reactivity ratios are essential quantitative values to predict the copolymer composition for any starting feed ratio and to understand the kinetic and mechanistic aspects of copolymerization [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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

Barim

Yayla

2014

International Journal of Polymer Science

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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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“…ATRP is an excellent and well-established method for obtaining block copolymers using simple experimental protocols and a large variety of the available monomers, especially for preparation of amphiphilic block copolymers with well-defined architecture and narrow molecular weight distribution [43][44][45][46][47][48][49][50]. This example demonstrates, in the best way, the features that must be considered for a successful employment of ATRP in block copolymer synthesis.…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

Preparation and self-assembly behavior of polystyrene-block-poly (dimethylaminoethyl methacrylate) amphiphilic block copolymer using atom transfer radical polymerization

Zhu¹,

Tan²,

Du³

2008

Express Polym. Lett.

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Asymmetric and semi-symmetric amphiphilic diblock copolymers polystyrene-block-poly (dimethylaminoethyl methacrylate) (PS-b-PDMAEMA) with the same PS block length of 62 repeat units and quite short (3 repeat units) or equivalent (47 repeat units) length of PDMAEMA have been prepared simply by varying the ratio of the bromine-terminated macroinitiator polystyrene (PS-Br) to DMAEMA using atom transfer radical polymerization (ATRP). The chemical structures and compositions of the PS-b-PDMAEMA block copolymers are studied by nuclear magnetic resonance (NMR) spectroscopy, gel permeation chromatography (GPC), and elementary analysis (EA). The self-assembly behaviors of copolymers in N,N-dimethyl formamide (DMF) with different pH and dioxane/water binary solvent mixture by direct dissolution method (DD), are studied by transmission electron microscopy (TEM), electron diffracting analysis (EDA), and energy-dispersive analysis of X-rays (EDAX) techniques. Transmission electron microscopy results suggest that asymmetric block copolymer PS62-b-PDMAEMA3 (the numbers in the form of footnotes represent repeated units of each monomer in the copolymer) can form spherical core-shell micelles, large compound reverse micelles (LCRMs), hexagonal/rhombic phases, reverse hexagonal/rhombic phases, vesicles, reverse vesicles and necklace-like reverse micelles, controlled by common or selective solvent and pH, while most of the aggregates of semi-symmetric PS62-b-PDMAEMA47 are simply spherical, such as spherical core-shell micelles and reverse spherical core-shell micelles, besides hexagonal/rhombic phases. All above structures are controlled by three components of the free energy of aggregation: core-chain stretching, interfacial energy and intercoronal chain interaction

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Conventional and atom transfer radical copolymerization of phenoxycarbonylmethyl methacrylate-styrene and thermal behavior of their copolymers

Cited by 7 publications

References 30 publications

Methacrylate Polymers Having Pendant Chalcone Moieties: Monomer Reactivity Ratios, Thermal and Optical Properties

Methacrylate Polymers Having Pendant Chalcone Moieties: Monomer Reactivity Ratios, Thermal and Optical Properties

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

Preparation and self-assembly behavior of polystyrene-block-poly (dimethylaminoethyl methacrylate) amphiphilic block copolymer using atom transfer radical polymerization

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