Reinforcement of Silicon-Containing Arylacetylene/Quarts Fiber composites by poly(imide-co-siloxane) macromolecular coupling agent

6th Annual International Conference on Material Science and Engineering

Ru, Lingao^1 ; Hu, Yanhong^1 ; Gu, Yuanbo^1 ; Zhang, Fangfang^1 ; Cheng, Bin^1 ; Zhou, Yan^1 ; Deng, Shifeng^1

Key Laboratory of Specially Functional Polymeric Materials and Related Technology, Ministry of Education, School of Materials and Engineering, East China University of Science and Technology, 200237, China^1

关键词: Aryl acetylenes;    Chemical bondings;    Fiber composite;    Interlaminar shear strength;    Macromolecular coupling agents;    Notched impact strength;    Silane coupling agent;    Strength and toughness;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/397/1/012018/pdf
DOI  :  10.1088/1757-899X/397/1/012018

来源: IOP

【 摘 要 】

In this paper, poly(imide siloxane) copolymers (PISs) with crystalline polyimide hard block and PISs with amorphous polysiloxane soft block were introduced into a novel macromolecular silane coupling agent. The result showed that the interlaminar shear strength (ILSS), flexural strength and notched impact strength increased by 47.0%, 60.6% and 78.1%, respectively. At 250 °C, the retention rate of ILSS and flexural strength reached 81.9% and 85.1%. The retention rate of ILSS and flexural strength reached 57.9% and 59.3% at 500 °C, respectively. The surface morphology was explored by X-ray photoelectron spectroscopy (XPS), and the data revealed that chemical bonding was tight between fiber and P3. Finally, the mechanism of reinforcement and toughness extracted from interphase morphologies of scanning electron microscopy (SEM) suggested that soft and moderate macromolecule layers were constructed between the matrix and the fiber when treated with P3, which improved the mechanical strength and toughness of the Silicon-Containing Arylacetylene/Quarts Fiber (PSA/QF) composites. Overall, these findings look promising for future in reinforcement and heat-resistance.