Polycarbonate-Co-PMMA Block Copolymers via Atom Transfer Radical Polymerization Reaction

Jang, Hohyoun; Ahmed, Faiz; Joo, Hyunho; Ryu, Taewook; Yang, Haoran; Yoon, Seok Ho; Kim, Whangi; Jeon, Heung-Seok

doi:10.1166/jnn.2017.14810

Cited by 4 publications

(4 citation statements)

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“…Additionally, a weakly acidic phosphonium salt was investigated as a possible transesterification catalyst (1 g of this catalyst dispersed under steady stirring in 150 mL deionized water of pH = 5.8 yielded an aqueous dispersion with a pH of 4.8). 15 from Xplore (Sittard, Netherlands) was used with residence times in the range of 3 up to 30 min. Compounding conditions were set at a melt temperature of 260 • C and a rotation speed of 100 rpm.…”

Section: Methodsmentioning

confidence: 99%

“…As solution casting [8][9][10][11][12] is not really an industrially relevant process, it will not be further elaborated in the context of the present study. For melt mixing, three fundamentally different strategies have been described in the literature that result in PC/PMMA blends with improved polymer compatibility, namely: a) addition of nanoparticles that accumulate in the polymer interphase and affect interfacial surface tension [13,14], b) use of presynthesized PC-block(b)-PMMA copolymers as an additive for the same purpose [15][16][17], and c) reactive compatibilization by catalytic transesterification of PC and PMMA under in-situ formation of PC-graft(g)-PMMA copolymers [6,7,13,[18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Transparent PC/PMMA Blends Via Reactive Compatibilization in a Twin-Screw Extruder

2019

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The effect of different catalysts on reactive compatibilization of 50/50 polycarbonate (PC)/polymethylmethacrylate (PMMA) blends achieved via transesterification that occurs during compounding in a twin-screw extruder was investigated on a phenomenological (optical and mechanical properties), mesoscopic (phase morphology), and molecular level (PC-graft(g)-PMMA-copolymer formation and polymer molecular weight degradation). Formation of PC-(g)-PMMA-copolymer by transesterification resulting in transparent mono-phase PC/PMMA blends with obviously improved compatibility of the two polymer constituents requires use of a suitable catalyst. As a side-effect, PC-(g)-PMMA-copolymer formation by transesterification is always accompanied by a significant simultaneous decomposition of the molecular weight (M w ) of the PC. For the first time, a colorless, transparent (mono-phase) PC/PMMA 50/50 blend was achieved by a twin-screw extrusion process that can be easily transferred into industrial scale. To achieve this milestone, 0.05 wt% of a weakly acidic phosphonium salt catalyst had to be applied. As a result of the decrease in M w of the PC, the mechanical properties (e.g., tensile strain at break and impact strength) of the obtained blends were significantly deteriorated rather than improved as targeted by the polymer compatibilization; therefore, the produced transparent PC/PMMA blends are considered not yet technically suitable for any industrial applications. Different manufacturing process strategies that do not inherently result in PC degradation as a side effect of PC-graft(g)-PMMA-copolymer formation have to be developed to potentially achieve transparent PC/PMMA blends with a useful balance of properties. Based on the experimental observations of this study, a new mechanism of the transesterification reaction occurring during reactive compounding of PC and PMMA in the presence of the effective catalysts is proposed.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transparent PC/PMMA Blends Via Reactive Compatibilization in a Twin-Screw Extruder

2019

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“…PMMA block copolymers have also been synthesized with PCs, since PCs show a similar level of transparency (89%) and impact resistance as PMMA. Jang and co-workers have synthesized a series of PMMA- co -PC copolymers with different ratios of the monomers via a radical polymerization technique . The optimized copolymer (PMMA-PC-40) produced a highly flexible film when solution casted onto a mold.…”

Section: Flexible and Transparent Pmma-based Copolymersmentioning

confidence: 99%

“…Jang and co-workers have synthesized a series of PMMA- co -PC copolymers with different ratios of the monomers via a radical polymerization technique. 65 The optimized copolymer (PMMA-PC-40) produced a highly flexible film when solution casted onto a mold. Hosseini et al have also employed the free radical polymerization technique to synthesize four poly(methyl methacrylate- co -methacrylic acid) (PMMA- co -MAA) copolymers with different compositions.…”

Section: Flexible and Transparent Pmma-based Copolymersmentioning

confidence: 99%

Methyl Methacrylate-Based Copolymers: Recent Developments in the Areas of Transparent and Stretchable Active Matrices

et al. 2022

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The recent advancements of poly(methyl methacrylate) (PMMA) as a transparent flexible polymer material have been utilized in numerous areas of engineering and materials science. PMMA-based copolymers demonstrate outstanding mechanical and optical properties owing to high transparency, lightweight nature, high impact resistance, and stress relaxation across glass transition temperature. These copolymers have unique characteristics of retaining optical and microstructural integrities during successive bending or elongations which make them an attractive choice for materials of stretchable electronics. In particular, there has been an escalated rise in the use of methyl methacrylate (MMA)-based transparent and stretchable copolymer films during the recent decades. Therefore, we have highlighted these recent developments into a comprehensive review in order to aid the future progress in these diverse fields. Herein, we have highlighted the scope of MMA as an important building block for the synthesis of highly transparent and flexible materials. The synthetic pathways of these copolymer materials and the resulting mechanical properties have been discussed. Moreover, the immense scope of these copolymer films has been highlighted by virtue of their applications in various industries.

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Crosslinked network formation beyond graft copolymers in transparent bisphenol-A Polycarbonate/Poly(methyl methacrylate) blends catalyzed by bis(trifluoromethanesulphonyl)imide based organic salts

Yan

2021

Polymer

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Polycarbonate-Co-PMMA Block Copolymers via Atom Transfer Radical Polymerization Reaction

Cited by 4 publications

References 0 publications

Transparent PC/PMMA Blends Via Reactive Compatibilization in a Twin-Screw Extruder

Transparent PC/PMMA Blends Via Reactive Compatibilization in a Twin-Screw Extruder

Methyl Methacrylate-Based Copolymers: Recent Developments in the Areas of Transparent and Stretchable Active Matrices

Crosslinked network formation beyond graft copolymers in transparent bisphenol-A Polycarbonate/Poly(methyl methacrylate) blends catalyzed by bis(trifluoromethanesulphonyl)imide based organic salts

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