Synthesis and Characterization of Grafted Silicone Polycarbonates

Mollah, M. S. Islam; Seo, Dong Wan; Islam, M. R.; Lim, Young Don; Cho, Sung Hwan; Shin, Kyung Moo; Kim, Jae Hyun; Kim, Whan Gi

doi:10.1080/10601325.2011.562735

Cited by 12 publications

(5 citation statements)

References 10 publications

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“…The synthesis and characterization of aliphatic and aromatic siloxane-amide copolymers with different compositions were also discussed (196,197). (252)(253)(254). PDMS-PC copolymers formedclear and highly transparent films, similar to polycarbonate.…”

Section: Figure 19mentioning

confidence: 99%

“…All copolymers displayed multiphase morphologies and siliconerich hydrophobic surfaces. They also had higher impact strengths, especially at low temperatures,when compared with PC homopolymer and improved thermo-oxidative stability andoxygen-to-nitrogen permselectivity (252)(253)(254). Segmented PDMS-PC copolymers were prepared through the reaction of preformed blocks (255).…”

Section: Figure 19mentioning

confidence: 99%

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Silicone containing copolymers: Synthesis, properties and applications

Yılgör

2014

Progress in Polymer Science

435

322

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A comprehensive survey of the recent developments on the synthesis, properties and applications of silicone containing copolymers is provided. Influence of (−R 2 Si−O−) backbone composition on the physicochemical properties of silicone copolymers, such as thermal transitions, solubility parameter and surface tension is discussed. Preparation and properties of well-defined α,ω-reactive organofunctionally terminated (telechelic) silicone oligomers and their utilization in the preparation of a wide range of block and segmented copolymers through step-growth,anionic, ring-opening and living free-radicalpolymerization techniques are provided. Use of silicone oligomers in the modification of polymeric network structures is also discussed. Special emphasis is given to the discussion of the effect of silicone oligomer and organic segment structure and molecular weight on the morphology and surface and bulk properties of the resultant silicone containing copolymers and networks.

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Section: Figure 19mentioning

confidence: 99%

Section: Figure 19mentioning

confidence: 99%

Silicone containing copolymers: Synthesis, properties and applications

Yılgör

2014

Progress in Polymer Science

435

322

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“…Thermal analyses of the materials were also performed to verify not only the temperature at which the Diels–Alder and retro-Diels–Alder reactions occurred but also the stability of the materials over a series of heating and cooling cycles. − Formulation 22b was selected as a representative sample for thermal analysis. Seven cycles of heating and cooling were performed from 35 to 120 °C, with a heating/cooling rate of ±4 °C and a holding time of 30 min after each increase in temperature.…”

Section: Resultsmentioning

confidence: 99%

Transparent and Thermoplastic Silicone Materials Based on Room-Temperature Diels–Alder Reactions

et al. 2023

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A chemoenzymatic synthesis was used in the production of translucent silicone material with Diels−Alder cross-links. The exploration of a library of diene and dienophile combinations yielded materials that were initially cured in 5 h at room temperature and that could be repaired in <5 min with a relatively low-temperature regimen (heat to 80 °C and cool to room temperature to cure). All of the synthesized materials were thermoplastic and could be remolded while effectively retaining the bulk properties of the parent material (e.g., translucency, tensile strength, hardness, etc.). The healed "scars" of the materials were quite robust, with subsequent catastrophic failure during elongation of repaired materials occurring outside of these locations. To the best of our knowledge, this is the first and only reported case of a cross-linked silicone material based on the Diels−Alder reaction, where curing of the silicone material occurs at room temperature.

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“…[32][33][34] These functional groups have been further modified by appropriate click reactions to obtain aliphatic polycarbonates with a desirable set of properties. However, scanty attention has been paid to the synthesis of aromatic polycarbonates containing pendant clickable functional groups except for polycarbonates containing allyl, [35][36][37] propargyl, [5] or maleimido groups. [38] Polymers containing pendant azido groups are of particular interest as azido group provides an excellent handle for quantitative chemical modifications via copper-catalyzed azidealkyne cycloaddition (CuAAC) click reaction, azide-norbornene cycloaddition, azide-maleimide cycloaddition, azide-thioacid amidation and reduction of azido to amine.…”

Section: Introductionmentioning

confidence: 99%

“…These functional groups have been further modified by appropriate click reactions to obtain aliphatic polycarbonates with a desirable set of properties. However, scanty attention has been paid to the synthesis of aromatic polycarbonates containing pendant clickable functional groups except for polycarbonates containing allyl, [35–37] propargyl, [5] or maleimido groups [38] …”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and UV‐Crosslinking of Aromatic (Co)polycarbonates Bearing Pendant Azido Groups

et al. 2022

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A new series of (co)polycarbonates bearing pendent azido groups was synthesized by polycondensation of varying molar proportions of 4, 4'-(5-azidopentane-2, 2-diyl) diphenol and bisphenol-A with triphosgene. The chemical structures, compositions and random nature of (co)polycarbonates were confirmed by NMR spectroscopy. Inherent viscosities and numberaverage molecular weights of (co)polycarbonates were in the range 0.63-0.77 dL g À 1 and 35,400-43,400 g mol À 1 , respectively indicating the formation of reasonably high molecular weight polymers. (Co)polycarbonates could be cast into tough, transparent and flexible films from chloroform solutions. (Co)polycarbonates were further characterized using IR spectroscopy, XRD, TGA and DSC. The thermal crosslinking of (co)polycarbonates bearing pendant azido groups was studied by DSC analysis. Independently, (co)polycarbonates bearing pendant azido groups were exposed to UV irradiation at wavelength of 254 nm and decomposition reaction of azido groups was monitored by FT-IR spectroscopy. The complete decomposition of azido groups was observed with exposure time of 30 min. The formed cross-linked (co)polycarbonates exhibited improved % char yield values compared to parent (co)polycarbonates. The measurement of mechanical properties of representative crosslinked (co)polycarbonates indicated increase in tensile strength and Young's modulus and decrease in % elongation compared to corresponding parent linear (co)polycarbonates.

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Synthesis and Characterization of Grafted Silicone Polycarbonates

Cited by 12 publications

References 10 publications

Silicone containing copolymers: Synthesis, properties and applications

Silicone containing copolymers: Synthesis, properties and applications

Transparent and Thermoplastic Silicone Materials Based on Room-Temperature Diels–Alder Reactions

Synthesis, Characterization and UV‐Crosslinking of Aromatic (Co)polycarbonates Bearing Pendant Azido Groups

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