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首页> 外文期刊>RSC Advances >Non-covalent functionalization of graphene oxide by pyrene-block copolymers for enhancing physical properties of poly(methyl methacrylate)
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Non-covalent functionalization of graphene oxide by pyrene-block copolymers for enhancing physical properties of poly(methyl methacrylate)

机译：pyr嵌段共聚物对氧化石墨烯的非共价官能化，以增强聚甲基丙烯酸甲酯的物理性能

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摘要

Pyrene-functionalized poly(methyl methacrylate)-block-polydimethylsiloxane (Py-PMMA-b-PDMS) copolymers were synthesized via activators regenerated by an electron transfer atom transfer radical polymerization (ARGET ATRP) method and further used to functionalize graphene oxide (GO) through the pi-pi interaction between pyrene and the carbon sheets. The modification efficiency of the non-covalently functionalized GO (GO@Py-PMMA-b-PDMS) particles was evaluated by studying their effects on the mechanical, optical and thermal properties of the PMMA. With incorporation of 0.05 wt% GO@Py-PMMA-b-PDMS, the tensile strength, Young's modulus, elongation at break and toughness of PMMA were increased by 23%, 54%, 117%, and 218%, respectively, showing simultaneously reinforcing and toughening effects of the functionalized GO particles; the initial decomposition temperature of PMMA increased by 11 degrees C from 349 degrees C to 360 degrees C; and the haze value of PMMA increased from 2.1% to 16.8%; the refractive index of PMMA varied from 1.48 to 1.51. This improvement in the physical properties of PMMA can be attributed to the homogeneous dispersion and enhanced interfacial adhesion between GO@Py-PMMA-b-PDMS and PMMA. This work demonstrates the feasibility of using GO@Py-PMMA-b-PDMS as a modifier for simultaneously improving the mechanical, optical and thermal properties of PMMA for potential organic light-emitting diodes and organic photovoltaics applications.
机译：通过电子转移原子转移自由基聚合（ARGET ATRP）方法再生的活化剂合成官能化的聚（甲基丙烯酸甲酯）-嵌段-聚二甲基硅氧烷（Py-PMMA-b-PDMS）共聚物，并进一步用于氧化石墨烯（GO）的官能化通过pyr和碳片之间的pi-pi相互作用。通过研究非共价官能化GO（GO @ Py-PMMA-b-PDMS）对PMMA的机械，光学和热性能的影响，评估了其改性效率。通过掺入0.05重量％的GO @ Py-PMMA-b-PDMS，PMMA的拉伸强度，杨氏模量，断裂伸长率和韧性分别增加了23％，54％，117％和218％，同时显示出功能化GO颗粒的增强和增韧效果; PMMA的初始分解温度从349摄氏度提高到360摄氏度，增加了11摄氏度; PMMA的雾度值从2.1％增加到16.8％; PMMA的折射率从1.48到1.51不等。 PMMA物理性能的这种改善可归因于GO @ Py-PMMA-b-PDMS与PMMA之间的均匀分散和增强的界面粘合力。这项工作证明了使用GO @ Py-PMMA-b-PDMS作为改性剂同时改善潜在有机发光二极管和有机光伏应用的PMMA的机械，光学和热性能的可行性。

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