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Hokkaido University Collection of Scholarly and Academic Papers >
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Effects of network junctions and defects on the crystallization of model poly(ethylene glycol) networks
| Title: | Effects of network junctions and defects on the crystallization of model poly(ethylene glycol) networks |
| Authors: | Ohira, Masashi Browse this author | | Nakagawa, Shintaro Browse this author | | Sampei, Ryotaro Browse this author | | Noritomi, Takako Browse this author | | Sakai, Takamasa Browse this author | | Shibayama, Mitsuhiro Browse this author | | Li, Xiang Browse this author →KAKEN DB |
| Issue Date: | 28-Feb-2023 |
| Publisher: | Royal Society of Chemistry |
| Journal Title: | Soft matter |
| Volume: | 19 |
| Issue: | 8 |
| Start Page: | 1653 |
| End Page: | 1663 |
| Publisher DOI: | 10.1039/d2sm01036d |
| Abstract: | Polymer crystallization drastically changes the physical properties of polymeric materials. However, the crystallization in polymer networks has been little explored. This study investigated the crystallization behavior of a series of poly(ethylene glycol) (PEG) networks consisting of well-defined branched precursors. The PEG networks were prepared by drying gels synthesized at various conditions. The PEG networks showed slower crystallization with lower final crystallinity than uncrosslinked PEGs with amine end groups. Surprisingly, the effect of network formation was not as significant as that of the relatively bulky end-groups introduced in the uncrosslinked polymer. The molecular weight of the precursor PEG, or equivalently the chain length between neighboring junctions, was the primary parameter that affected the crystallization of the PEG networks. Shorter network chains led to lower crystallization rates and final crystallinity. This effect became less significant as the network chain length increased. On the other hand, the spatial and topological defects formed in the gel synthesis process did not affect the crystallization in the polymer networks at all. The crystallization in the polymer networks seems insensitive to these mesoscopic defects and can be solely controlled by the chain length between junctions. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/88905 |
| Appears in Collections: | 生命科学院・先端生命科学研究院 (Graduate School of Life Science / Faculty of Advanced Life Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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