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dc.contributor.authorKurkin, Anatolien_US
dc.contributor.authorLipik, Vitalien_US
dc.contributor.authorTan, Kevin Bo Linen_US
dc.contributor.authorSeah, Geok Lengen_US
dc.contributor.authorZhang, Xinen_US
dc.contributor.authorTok, Alfred Iing Yoongen_US
dc.identifier.citationKurkin, A., Lipik, V., Tan, K. B. L., Seah, G. L., Zhang, X. & Tok, A. I. Y. (2021). Correlations between precursor molecular weight and dynamic mechanical properties of polyborosiloxane (PBS). Macromolecular Materials and Engineering, 306(11), 2100360-.
dc.description.abstractIt is possible to tailor the dynamic response of polyborosiloxanes (PBS) based on picking the right molecular weight of a precursor. The molecular weight of hydroxy-terminated polydimethylsiloxane (PDMS) defines the shear-stiffening performance of PBS due to straightforward condensation reaction between hydroxy end groups of PDMS and boric acid. Introduced borono groups behave as stickers, hence, are prone to supramolecular interactions. New correlations are discovered for five PBS synthesized from hydroxy-terminated PDMS with different molecular weights. Si─O─B infrared band intensities for all PBS follow the same trend with molecular weight as the number of PDMS hydroxy groups which confirms the full completion of the reaction. After synthesis, the molecular weight of PBSs remained almost the same, which indicates the absence of significant chain scissoring, polymerization, or crosslinking. During the rheological analysis, it is found that crossover point modulus follows the same trend as the number of PDMS hydroxy groups and Si─O─B band intensities. PBS demonstrates a linear increase in peak forces with molecular weight during the drop weight impact test. The low molecular weight of a precursor, hence, a high number of stickers is a primary requirement for effective protection against low-velocity impact.en_US
dc.relation.ispartofMacromolecular Materials and Engineeringen_US
dc.rights© 2021 Wiley-VCH GmbH. All rights reserved.en_US
dc.subjectEngineering::Mechanical engineeringen_US
dc.titleCorrelations between precursor molecular weight and dynamic mechanical properties of polyborosiloxane (PBS)en_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.subject.keywordsImpact Protectionen_US
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