Synthesis of Vinylic Macromolecular Rotaxane Cross-Linkers Endowing Network Polymers with Toughness
- 8 May 2015
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Macro Letters
- Vol. 4 (5), 598-601
- https://doi.org/10.1021/acsmacrolett.5b00242
Abstract
Macromolecular rotaxane cross-linkers having two radically polymerizable vinyl groups (RCs) were first synthesized and used to prepare network polymers. A crown ether/sec-ammonium-type pseudorotaxane initiator having an OH terminal-containing axle and a crown ether wheel with a vinyl group was subjected to the living ring-opening polymerization of δ-valerolactone followed by end-capping with a bulky isocyanate to yield a polyester axle-tethering macromolecular [2]rotaxane cross-linker (RC). Rotaxane cross-linked polymers (RCPs) were prepared by the radical polymerization of n-butyl acrylate in the presence of RCs (0.25, 0.50 mol %). The properties of the RCPs and covalently cross-linked polymers (CCPs) were characterized mainly by mechanical properties. Both fracture stress and strain values of RCPs were much higher than those of CCPs, probably owing to the increased network homogeneity by the rotaxane cross-link. The hybrid-type RCPs obtained from a mixture of RC and covalently connected cross-linker (CC) showed poorer mechanical properties similar to that of CCPs, indicating the importance of RCs in increasing the toughness of the network polymers.Keywords
Funding Information
- Ministry of Education, Culture, Sports, Science, and Technology (26102512, 26886006)
- Japan Science and Technology Agency
This publication has 33 references indexed in Scilit:
- Extremely stretchable thermosensitive hydrogels by introducing slide-ring polyrotaxane cross-linkers and ionic groups into the polymer networkNature Communications, 2014
- Amphiphilic ferrocenylated alkylpyridinium: the formation of micelles and hydrogels and their disaggregation induced by an external stimulusDalton Transactions, 2013
- Stimuli-degradable cross-linked polymers synthesized by radical polymerization using a size-complementary [3]rotaxane cross-linkerPolymer Journal, 2013
- Versatile Supramolecular Cross‐Linker: A Rotaxane Cross‐Linker That Directly Endows Vinyl Polymers with Movable Cross‐LinksChemistry – A European Journal, 2013
- Polymer networks characterized by slidable crosslinks and the asynchronous dynamics of interlocked componentsReactive and Functional Polymers, 2013
- Photodegradable cross-linked polymer derived from a vinylic rotaxane cross-linker possessing aromatic disulfide axlePure and Applied Chemistry, 2013
- Viscoelastic Properties of Slide-Ring Gels Reflecting Sliding Dynamics of Partial Chains and Entropy of Ring ComponentsMacromolecules, 2012
- Mechanics of slide-ring gels: novel entropic elasticity of a topological network formed by ring and stringSoft Matter, 2012
- Synthesis and properties of a polyrotaxane network prepared from a Pd-templated bis-macrocycle as a topological cross-linkerPolymer Journal, 2011
- Physical gels based on supramolecular gelators, including host–guest complexes and pseudorotaxanesJournal of Materials Chemistry, 2010