Correlations between precursor molecular weight and dynamic mechanical properties of polyborosiloxane (PBS)
It 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 bet...
| Main Authors: | , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/160394 |
| _version_ | 1826125479826948096 |
|---|---|
| author | Kurkin, Anatoli Lipik, Vitali Tan, Kevin Bo Lin Seah, Geok Leng Zhang, Xin Tok, Alfred Iing Yoong |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Kurkin, Anatoli Lipik, Vitali Tan, Kevin Bo Lin Seah, Geok Leng Zhang, Xin Tok, Alfred Iing Yoong |
| author_sort | Kurkin, Anatoli |
| collection | NTU |
| description | It 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. |
| first_indexed | 2024-10-01T06:36:58Z |
| format | Journal Article |
| id | ntu-10356/160394 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:36:58Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1603942022-07-20T08:46:18Z Correlations between precursor molecular weight and dynamic mechanical properties of polyborosiloxane (PBS) Kurkin, Anatoli Lipik, Vitali Tan, Kevin Bo Lin Seah, Geok Leng Zhang, Xin Tok, Alfred Iing Yoong School of Materials Science and Engineering Engineering::Mechanical engineering Impact Protection Polyborosiloxane It 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. 2022-07-20T08:46:18Z 2022-07-20T08:46:18Z 2021 Journal Article Kurkin, 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-. https://dx.doi.org/10.1002/mame.202100360 1438-7492 https://hdl.handle.net/10356/160394 10.1002/mame.202100360 2-s2.0-85112620539 11 306 2100360 en Macromolecular Materials and Engineering © 2021 Wiley-VCH GmbH. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Impact Protection Polyborosiloxane Kurkin, Anatoli Lipik, Vitali Tan, Kevin Bo Lin Seah, Geok Leng Zhang, Xin Tok, Alfred Iing Yoong Correlations between precursor molecular weight and dynamic mechanical properties of polyborosiloxane (PBS) |
| title | Correlations between precursor molecular weight and dynamic mechanical properties of polyborosiloxane (PBS) |
| title_full | Correlations between precursor molecular weight and dynamic mechanical properties of polyborosiloxane (PBS) |
| title_fullStr | Correlations between precursor molecular weight and dynamic mechanical properties of polyborosiloxane (PBS) |
| title_full_unstemmed | Correlations between precursor molecular weight and dynamic mechanical properties of polyborosiloxane (PBS) |
| title_short | Correlations between precursor molecular weight and dynamic mechanical properties of polyborosiloxane (PBS) |
| title_sort | correlations between precursor molecular weight and dynamic mechanical properties of polyborosiloxane pbs |
| topic | Engineering::Mechanical engineering Impact Protection Polyborosiloxane |
| url | https://hdl.handle.net/10356/160394 |
| work_keys_str_mv | AT kurkinanatoli correlationsbetweenprecursormolecularweightanddynamicmechanicalpropertiesofpolyborosiloxanepbs AT lipikvitali correlationsbetweenprecursormolecularweightanddynamicmechanicalpropertiesofpolyborosiloxanepbs AT tankevinbolin correlationsbetweenprecursormolecularweightanddynamicmechanicalpropertiesofpolyborosiloxanepbs AT seahgeokleng correlationsbetweenprecursormolecularweightanddynamicmechanicalpropertiesofpolyborosiloxanepbs AT zhangxin correlationsbetweenprecursormolecularweightanddynamicmechanicalpropertiesofpolyborosiloxanepbs AT tokalfrediingyoong correlationsbetweenprecursormolecularweightanddynamicmechanicalpropertiesofpolyborosiloxanepbs |