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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and properties of silica-polyimide hybrid films derived from colloidal silica particles and polyamic acid
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Synthesis and properties of silica-polyimide hybrid films derived from colloidal silica particles and polyamic acid

机译：胶体二氧化硅颗粒与聚酰胺酸衍生的二氧化硅-聚酰亚胺杂化膜的合成与性能

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摘要

A series Of SiO2/polyimide hybrid films with different contents and sizes Of SiO2 particles were prepared by blending polyamic acid (PAA) and SiO2 nanoparticles obtained from Stober method, followed by a step thermal imidization process. The size and content effect of SiO2 particles on the mechanical and thermal properties was studied. It was found that as the silica particles were introduced into polyimide matrix, T(g)s of hybrid films increased on the whole and there was a maximum value of T-g for the hybrid film with 10-nm SiO2 particles. TGA indicated that the thermal stability for hybrid films decreased with the increasing content and size Of SiO2 particles. Dynamic mechanical thermal analysis (DMTA) indicated that the modulus of hybrid films increased, while the tensile strength and elongation at break decreased as the size Of SiO2 particles increases from 10 to 25 nm and to 65 nm. All polyimide hybrid films were amorphous according to X-ray determination. (c) 2008 Wiley Periodicals, Inc.
机译：通过混合聚酰胺酸（PAA）和斯托伯法制得的SiO2纳米颗粒，制备了一系列不同含量和尺寸的SiO2颗粒的SiO2 /聚酰亚胺杂化膜。研究了SiO2颗粒的尺寸和含量对力学性能和热性能的影响。发现将二氧化硅颗粒引入聚酰亚胺基质中时，杂化膜的T（g）整体上增加，并且具有10nm SiO 2颗粒的杂化膜的T-g具有最大值。 TGA表明，杂化膜的热稳定性随着SiO 2颗粒含量和尺寸的增加而降低。动态机械热分析（DMTA）表明，随着SiO2颗粒尺寸从10纳米增加到25纳米和65纳米，混合薄膜的模量增加，而拉伸强度和断裂伸长率降低。根据X射线测定，所有聚酰亚胺杂化膜均为非晶态。 （c）2008 Wiley期刊公司

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