Preparation and characterisation of branched poly (styrene-<i>co</i>-acrylonitrile) via atom transfer radical polymerisation using β-bromoethyl benzene as initiator

Huang, Wenyan; Xue, Xiaoqiang; Chen, J.; Fang, J. H.; Zhang, D.; Yang, Hongjun; Jiang, Bibiao; Kong, Lingbao; Pu, Hongting

doi:10.1179/1433075x14y.0000000216

Cited by 3 publications

(1 citation statement)

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“…Poor control over molecular weight and end‐group functionality is a major drawback of conventional FRP. However, in the last couple of decades significant developments in the field of controlled/living radical polymerization have occurred. Controlled radical polymerization techniques such as ATRP, NMP, and Reversible Addition‐Fragmentation Chain Transfer (RAFT) have been successfully employed to synthesize SA copolymers with well controlled molecular weight and low molar mass dispersity.…”

Section: Introductionmentioning

confidence: 99%

Reactivity Ratios and Sequence Distribution Characterization by Quantitative ¹³C NMR for RAFT Synthesis of Styrene‐Acrylonitrile Copolymers

Alam

Jack

Hill

et al. 2017

J. Polym. Sci. Part A: Polym. Chem.

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The kinetics and reactivity ratios of styrene‐acrylonitrile (SA) copolymerization have been studied extensively in bulk and in a variety of solution media using conventional free radical polymerizations (FRPs). Due to the significant difference in the two reactivity ratios for this monomer pair, at certain feed ratios the copolymers display composition drift with conversion due to monomer depletion. In this study, the kinetics of SA copolymerization using Reversible Addition‐Fragmentation Chain Transfer (RAFT) has been studied in bulk at 80 °C. The reactivity ratios for the terminal model were calculated from the comonomer sequence distributions for the RAFT process at low conversion for nine different compositions and found to be in the same range as those reported for conventional FRP of SA. The changes in the composition and sequence distribution with conversion were studied for three feed compositions. The copolymers show compositional drift with conversion, except at the azeotropic composition, and match the predictions from the reactivity ratios obtained at low conversion. From quantitative 13C NMR the triad distributions of these copolymers were estimated and found to match the predicted triad distributions as conversion increased. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 919–927

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Section: Introductionmentioning

confidence: 99%

Reactivity Ratios and Sequence Distribution Characterization by Quantitative ¹³C NMR for RAFT Synthesis of Styrene‐Acrylonitrile Copolymers

Alam

Jack

Hill

et al. 2017

J. Polym. Sci. Part A: Polym. Chem.

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A facile approach for preparing tadpole and barbell-shaped cyclic polymers through combining ATRP and atom transfer radical coupling (ATRC) reactions

et al. 2020

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Synthesis of Hyperbranched Poly(ε-caprolactone) Containing Terminal Azobenzene Structure via Combined Ring-Opening Polymerization and “Click” Chemistry

et al. 2015

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Abstract:A novel well-defined linear poly(ε-caprolactone) (P1) containing terminal azobenzene and ethyne groups was successfully synthesized through tin-catalyzed ring-opening polymerization of ε-caprolactone in the presence of N, N′-bis(2-hydroxyethyl)-4-(3-ethynylphenylazo)aniline (BHA) in bulk. Subsequent reactions allowed the synthesis of the corresponding bromoester end-functionalized polymer (P2), which was converted into AB2 type polymer (P3) containing terminal azide groups with NaN3. Consequently, hyperbranched poly(ε-caprolactone) (HPCL) was prepared with AB2 macromonomer (P3) by "click" chemistry under the catalysis of CuSO4·5H2O/sodium ascorbate/H2O. The structure of the resultant HPCL was characterized by gel permeation chromatography (GPC), proton nuclear magnetic resonance ( 1 H-NMR), ultraviolet-visible (UV-Vis) spectroscopy and fourier transform infrared spectroscopy (FT-IR). Thermal and crystallization properties of P1 and HPCL were further studied by differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD) and polarised optical microscopy (POM). These results indicated that the crystallinity of HPCL was slightly lower than that of P1 due to the hyperbranched structure of HPCL. Additionally, the photo-induced trans-cis isomerization behaviors of BHA, P1 and HPCL containing terminal azobenzene were investigated in chloroform solution, and the photoisomerization rate constant (kexp) of small molecule (BHA) was nearly three times faster than that of polymers P1 and HPCL, which was due to the sterically hindering effect of the polymer-chain configuration. OPEN ACCESSPolymers 2015, 7 1249

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Preparation and characterisation of branched poly (styrene-co-acrylonitrile) via atom transfer radical polymerisation using β-bromoethyl benzene as initiator

Cited by 3 publications

References 32 publications

Reactivity Ratios and Sequence Distribution Characterization by Quantitative ¹³C NMR for RAFT Synthesis of Styrene‐Acrylonitrile Copolymers

Reactivity Ratios and Sequence Distribution Characterization by Quantitative ¹³C NMR for RAFT Synthesis of Styrene‐Acrylonitrile Copolymers

A facile approach for preparing tadpole and barbell-shaped cyclic polymers through combining ATRP and atom transfer radical coupling (ATRC) reactions

Synthesis of Hyperbranched Poly(ε-caprolactone) Containing Terminal Azobenzene Structure via Combined Ring-Opening Polymerization and “Click” Chemistry

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Preparation and characterisation of branched poly (styrene-co-acrylonitrile) via atom transfer radical polymerisation using β-bromoethyl benzene as initiator

Cited by 3 publications

References 32 publications

Reactivity Ratios and Sequence Distribution Characterization by Quantitative 13C NMR for RAFT Synthesis of Styrene‐Acrylonitrile Copolymers

Reactivity Ratios and Sequence Distribution Characterization by Quantitative 13C NMR for RAFT Synthesis of Styrene‐Acrylonitrile Copolymers

A facile approach for preparing tadpole and barbell-shaped cyclic polymers through combining ATRP and atom transfer radical coupling (ATRC) reactions

Synthesis of Hyperbranched Poly(ε-caprolactone) Containing Terminal Azobenzene Structure via Combined Ring-Opening Polymerization and “Click” Chemistry

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Product

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Reactivity Ratios and Sequence Distribution Characterization by Quantitative ¹³C NMR for RAFT Synthesis of Styrene‐Acrylonitrile Copolymers

Reactivity Ratios and Sequence Distribution Characterization by Quantitative ¹³C NMR for RAFT Synthesis of Styrene‐Acrylonitrile Copolymers