期刊
JOURNAL OF POLYMER SCIENCE
卷 58, 期 5, 页码 692-703出版社
WILEY
DOI: 10.1002/pol.20190217
关键词
intramolecular collapse; mechanochemistry; crosslinking; structure-property relations; nanoparticles
资金
- Israel Science Foundation [920/15]
The mechanochemical stability of polymers in solution is enhanced if the chains are covalently folded. Under shear forces, the additional bonds absorb mechanical energy and inhibit unfolding, and as a result, slow down fragmentation. However, not all crosslinkers are equal in terms of their properties (length, strength, etc.). In order to understand the role of these added bonds in the polymers' stability under mechanical stress, a thorough study compares the rate of mechanochemistry on single-chain polymer nanoparticles which have been folded with crosslinkers with different lengths, strengths, positioning, and valencies. The usage of bonds with different mechanical strengths in the crosslinkers was found to be the most powerful way to change the mechanochemical fragmentation rate. In addition, positioning and valency also play significant role in the mechanical stabilization mechanism. (c) 2020 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2020 (c) 2020 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2020, 58, 692-703
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