表面修饰凹凸棒土填充PBT基复合材料的力学性能

doi:10.11896/cldb.23040289

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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.

Key words： attapulgite poly(butylene terephthalate) composites surface modification mechanical property

Published: Online: 2024-10-12

CLC number:

TB332

Fund:This work was financially supported by the Shanxi Province Science Foundation for Youths (202103021223385).

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	KANG Chenghu

Cite this article:

KANG Chenghu. Mechanical Properties of PBT Matrixed-Composites Filled with Surface Modified Attapulgite[J]. Materials Reports, 2024, 38(18): 23040289-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23040289 OR http://www.mater-rep.com/EN/Y2024/V38/I18/23040289

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