Tack of Entangled Molecular Bottlebrushes
Polymer softness (i.e., low elastic modulus) is a known requirement for good tack in adhesives. We assess the tack performance of α-olefin molecular bottlebrushes having an elastic modulus from 4 to 30 times lower than a linear polyolefin (polypropylene). Monotonic increases of the tack parameters a...
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| Published in: | ACS macro letters Vol. 12; no. 3; pp. 350 - 355 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
| Published: |
United States
American Chemical Society
21-03-2023
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| Online Access: | Get full text |
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| Summary: | Polymer softness (i.e., low elastic modulus) is a known requirement for good tack in adhesives. We assess the tack performance of α-olefin molecular bottlebrushes having an elastic modulus from 4 to 30 times lower than a linear polyolefin (polypropylene). Monotonic increases of the tack parameters are observed as the bottlebrush side chain length (N sc) increases and the modulus decreases. All-atom molecular dynamics simulations reveal that the monomeric bonding energy increases with N sc due to a strong van der Waals interaction between the side chains and the aluminum sheet, which overcomes the energy penalty imposed by side-chain bending. |
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| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 2161-1653 2161-1653 |
| DOI: | 10.1021/acsmacrolett.2c00710 |