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首页> 外文期刊>Journal of inorganic and organometallic polymers and materials >Synthesis and Characterization of PVAc-b-PDMS-b-PVAc Triblock Copolymers by Atom Transfer Radical Polymerization Initiated by PDMS Macroinitiator
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Synthesis and Characterization of PVAc-b-PDMS-b-PVAc Triblock Copolymers by Atom Transfer Radical Polymerization Initiated by PDMS Macroinitiator

机译：PDMS大分子引发剂引发的原子转移自由基聚合制备PVAc-b-PDMS-b-PVAc三嵌段共聚物并进行表征

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摘要

Poly(dimethylsiloxane) based triblock copolymer was synthesized from bis(bromoalkyl)-terminated PDMS macroinitiator (Br-PDMS-Br) and vinyl acetat telomers. Vinyl acetate telomers prepared from radical and controlled radical telomerization with Co(acac)_2/DMF catalyst and ligand, were used in atom transfer radical polymerization to synthesize Poly(vinylacetate-b-dimethylsiloxane-b-vinylce-tate) triblock copolymer. The PDMS based triblock copolymers revealed a significant effect of Co(acac)_2/DMF on PVAc telomere which was used in the synthesis of highly ordered triblock copolymer on a well-defined microstructure. The results were confirmed by ~1H NMR and DSC indicating that a low T_g of PDMS in the microstructure of triblock copolymer has made the block copolymer flexible for new applications.
机译：由双（溴烷基）封端的PDMS大分子引发剂（Br-PDMS-Br）和乙烯基乙酸酯端粒合成聚（二甲基硅氧烷）基三嵌段共聚物。由自由基（Co（acac）_2 / DMF催化剂和配体进行自由基和受控自由基端聚反应制得的乙酸乙烯酯端粒）用于原子转移自由基聚合反应中，以合成聚（乙酸乙烯酯-b-二甲基硅氧烷-b-乙烯基-乙酸酯）三嵌段共聚物。基于PDMS的三嵌段共聚物显示Co（acac）_2 / DMF对PVAc端粒具有显着影响，该端粒用于在明确的微观结构上合成高度有序的三嵌段共聚物。通过〜1H NMR和DSC证实了该结果，表明三嵌段共聚物的微观结构中PDMS的T_g低，使得嵌段共聚物对于新应用具有柔性。

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