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Journal article
Effect of Grafting Density on the Crystallization Behavior of Molecular Bottlebrushes
Macromolecules , v 57(17), pp 8487-8497
19 Aug 2024
PMID: 39281839
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Abstract
A unique case of sterically constrained crystallization arises in bottlebrush polymers bearing semicrystalline side chains. Bottlebrushes with grafted side chains can form crystalline structures governed by the complex interplay between side chain packing and backbone confinement. The confinement effect can be readily tuned by varying the side chain grafting density, thus affording control over the crystallization behavior of these systems. In this work, the grafting density effect on the crystallization behavior of molecular bottlebrushes comprising poly(ethylene oxide) (PEO) side chains grafted to a methacrylate backbone was systematically studied. Thermal analysis using differential scanning calorimetry showed that the bottlebrush polymers displayed suppressed crystallization temperatures, lower melting temperatures, and reduced crystallinities compared to linear homopolymer PEO. The crystalline morphology was investigated using polarized light, atomic force, and scanning electron microscopy. Isothermal crystallization experiments revealed a nonmonotonous dependence of the nucleation density on the side chain grafting density. The grafting density effect was also investigated using self-seeding experiments, revealing an increased clearing temperature and memory retention at higher grafting densities. This work highlights how grafting density influences the crystallization behavior of semicrystalline bottlebrushes, providing information for the processing and application of these unique polymers.
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Details
- Title
- Effect of Grafting Density on the Crystallization Behavior of Molecular Bottlebrushes
- Creators
- Christopher Li (Corresponding Author) - Drexel University, Materials Science and EngineeringJeffrey T Wilk - Drexel UniversityCarl T Furner - Drexel UniversityEthan W. Kent - University of Tennessee at KnoxvilleMichael T. KellyBin Zhao (Corresponding Author) - University of Tennessee at Knoxville
- Publication Details
- Macromolecules , v 57(17), pp 8487-8497
- Publisher
- ACS Publications
- Number of pages
- 11
- Grant note
- National Science Foundation: DMR 2104968, DMR-2004564 NSF through the University of Pennsylvania Materials Research Science and Engineering Center (MRSEC): DMR-2309043
This research was financially supported by the National Science Foundation DMR 2104968 (C.Y.L.) and DMR-2004564 (B.Z.). SEM images were taken at the Drexel Materials Characterization Core. The authors acknowledge the use of facilities supported by the Laboratory for Research on the Structure of Matter and the NSF through the University of Pennsylvania Materials Research Science and Engineering Center (MRSEC) DMR-2309043.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001295150500001
- Scopus ID
- 2-s2.0-85201713379
- Other Identifier
- 991021897113004721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Polymer Science