Mechanical properties and crystallization of polybutylene terephthalate reinforced with glass flakes and aluminum powder

Nattakarn HONGSRIPHAN; Pajaera PATANATHABUTR

doi:10.55713/jmmm.v36i1.2301

ผู้แต่ง

Nattakarn HONGSRIPHAN Department of Materials Science and Engineering, Faculty of Engineering andIndustrial Technology, Silpakorn University, Nakhon Pathom,73000, Thailand https://orcid.org/0000-0002-5833-8990
Pajaera PATANATHABUTR Department of Materials Science and Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom, 73000, Thailand

DOI:

https://doi.org/10.55713/jmmm.v36i1.2301

คำสำคัญ:

PBT, glass flake, aluminum powder, electrical surface resistivity, composite

บทคัดย่อ

This research investigated mechanical properties and crystallization of poly(butylene terephthalate) composites by adding glass flakes (GF) and aluminum particles (Al). The concentration of the GF was 3 wt% or 5 wt%, and the Al was 0.5 wt% or 1.0 wt%. The stress-strain curves of the PBT-based composites showed yielding and necking. The PBT/GF/Al composites with GF/Al ratios of 3/0.5 wt/wt%, 3/1.0 wt/wt%, 5/0.5 wt/wt%, and 5/1.0 wt/wt% had Young’s moduli of 11.44%, 11.70%, 16.81%, and 19.31% higher than that of neat PBT, respectively. In the presence of Al at 1.0 wt%, the flexural modulus of the PBT/GF/Al composites increased to 3.6% higher than that of neat PBT, and all flexure specimens recovered elastically after being subjected to 5% strain. The neat PBT and all PBT/GF/Al composites exhibited the XRD pattern of a-form crystals, in which the changed crystal dimensions implied the heterogeneous nucleation with the presence of these fillers. The cooling rate of the injection molding was so fast that the filler-nucleated crystallization formed only a-form crystals. Adding the GF and Al increased the T_c of the PBT matrix, confirming these fillers acted as nucleating agents. Adding GF/Al fillers of 6 wt% reduced the electrical surface resistivity to 10¹⁰ ohm∙sq^‒1, indicating it was an anti-static material.

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ประวัติผู้แต่ง

Nattakarn HONGSRIPHAN, Department of Materials Science and Engineering, Faculty of Engineering andIndustrial Technology, Silpakorn University, Nakhon Pathom,73000, Thailand

Nattakarn Hongsriphan is a full-time faculty member in the position of associate professor at the Department of Materials Science and Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Thailand. She was born in Sukhothai, Thailand, on May 5, 1972. She graduated with her bachelor’s degree in chemistry from Chiangmai University, Thailand (1997), and graduated with her Doctor of Engineering in Plastics Engineering from the University of Massachusetts Lowell, USA (2003). She is the author of two books (in Thai language) and more than 40 journal articles. Her research interests include polymer blends, polymer composites, and polymer
processing.

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