Abstract: The attapulgite(ATP)was surface modified by γ-glycidyl etheroxy propyltrimethoxy silane coupling agent (KH-560) via the water bath method. And the poly(butylene terephthalate) (PBT) matrixed-composites filled with attapulgite were prepared by melt intercalation blending technique. The crystal structure, surface morphology, and dispersion characteristics of ATP were characterized. The mechanical properties of the composite were investigated by tensile and notch impact strength testing. The tensile fracture morphology of the composite was analyzed. In addition, the reinforcement mechanism of ATP on PBT matrix was discussed. The results show that the ATP presents a typical fiber rod structure, with a rough and uneven surface and a diameter of about 30 nm. The KH-560 is successfully grafted on the surface of ATP through dehydration and condensation based on the presence of hydroxyl groups on the surface of ATP, which results in an increase in the crystal plane spacing of ATP, refinement of crystalline grain size, and the improvement of dispersion in PBT matrix. In case of the PBT matrixed-composites filled with modified ATP by KH-560, the long organic chain of modifiers on the surface of ATP and the molecular chain of PBT infiltrate each other, which results the formation of flexible interface layer with a certain thickness. Notably, the interfacial adhesion characteristics between the ATP and PBT matrix are enhanced. When the mass fractions of acid washed ATP and modified ATP by KH-560 are 3wt%, the tensile strength of corresponding composites reaches up to 58.1 MPa and 61.4 MPa, respectively, increasing by 13.3% and 19.7% compared to pure PBT.
通讯作者:
*康成虎,通信作者,吕梁学院物理与电子信息工程系讲师。2016年于重庆文理学院材料成型及控制工程专业本科毕业,2021年于兰州理工大学材料学专业博士毕业后到吕梁学院工作至今。目前主要从事材料微结构表征、聚合物基纳米复合材料力学性能和阻燃性能等方面的研究工作。发表论文6篇,包括Journal of Vinyl and Additive Technology、Materials Research Express、Polymer Composites、Journal of Dispersion Science and Technology等。20211019@llu.edu.cn
引用本文:
康成虎. 表面修饰凹凸棒土填充PBT基复合材料的力学性能[J]. 材料导报, 2024, 38(18): 23040289-6.
KANG Chenghu. Mechanical Properties of PBT Matrixed-Composites Filled with Surface Modified Attapulgite. Materials Reports, 2024, 38(18): 23040289-6.
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