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Method for Continuous Alignment of Boron Nitride in a Composite Material

Tubbs, Cassandra T
http://rave.ohiolink.edu/etdc/view?acc_num=case1733314651223234

Abstract Details

2025, Master of Sciences (Engineering), Case Western Reserve University, Macromolecular Science and Engineering.
Hexagonal boron nitride is a platelet-like thermally conductive filler commonly used to increase the thermal conductivity of polymers. Good alignment of boron nitride in the in-plane direction is required to create a good network for phonon transport to achieve high thermal conductivity in composite materials. To create good alignment of platelet-like particles, extensional flow is needed, like what is experienced by a polymer melt in a layer multiplication element in forced assembly co-extrusion. As a result, films with A/B structure of hBN + polymer/unfilled polymer were made using layer multiplication co-extrusion. The high degree of alignment and confinement of boron nitride into every other layer led to a higher-than-expected thermal conductivity at relatively low loadings of boron nitride. At only 12.7vol% (25wt%) filler loading, a composite film reached a thermal conductivity of 3.41 Wm-1K-1 which is much higher than was predicted by modeling.
Gary Wnek (Advisor)
Gary Wnek (Committee Chair)
Lei Zhu (Committee Member)
Joao Maia (Committee Member)
Svetlana Morozova (Committee Member)
75 p.
Materials Science; Plastics
forced assembly coextrusion; boron nitride; multilayer film; thermal conductivity; thermally conductive polymer composite; BN

Recommended Citations

Citations

  • Tubbs, C. T. (2025). Method for Continuous Alignment of Boron Nitride in a Composite Material [Master's thesis, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1733314651223234

    APA Style (7th edition)

  • Tubbs, Cassandra. Method for Continuous Alignment of Boron Nitride in a Composite Material . 2025. Case Western Reserve University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1733314651223234.

    MLA Style (8th edition)

  • Tubbs, Cassandra. " Method for Continuous Alignment of Boron Nitride in a Composite Material ." Master's thesis, Case Western Reserve University, 2025. http://rave.ohiolink.edu/etdc/view?acc_num=case1733314651223234

    Chicago Manual of Style (17th edition)

case1733314651223234
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This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.