Synthesis of topologically crosslinked polymers with rotaxane-crosslinking points

A Guiding Principle for Strengthening Crosslinked Polymers: Synthesis and Application of Mobility‐Controlling Rotaxane Crosslinkers

“…Rotaxane-crosslinkedpolymers(RCPs)have attracted great attention both from afundamental and apractical perspective because of the extraordinary functionality based on the mechanically linked components with high mobility. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] Ito et al have reported that cyclodextrin-based polyrotaxane hydrogels with rotaxane crosslinks show excellent swelling ability and extensibility. [15] Related studies on such crosslinked cyclodextrin-based polyrotaxanes also revealed intriguing properties that cannot be attained by crosslinked polymers using covalent crosslinkers.…”

“…Fort he evaluation of the effect of the mobility of the components on the properties of the corresponding RCP_Rs, RC_Rsw ith different thickness,w hich contain two vinyl groups in the two components,were designed and synthesized (Scheme 1a). Ap seudo [2]rotaxane initiator (3), prepared in situ from an hydroxy-terminated sec-ammonium-type axle (1) and am ethacryloyl group tethering crown-ether wheel (2), was subjected to aD PP-catalyzed living ring-opening polymerization of six-membered cyclic carbonates [24,25] which contain two Rs ubstituents at the 5-position (R = H, Me,o r Et). [26] Thep olymerization was followed by the addition of 3,5-dimethylphenyl isocyanatea sabulky end-capping agent to afford am acromolecular [2]rotaxane that is comprised of one wheel and apolymeric axle chain (4).…”

“…Ap seudo [2]rotaxane initiator (3), prepared in situ from an hydroxy-terminated sec-ammonium-type axle (1) and am ethacryloyl group tethering crown-ether wheel (2), was subjected to aD PP-catalyzed living ring-opening polymerization of six-membered cyclic carbonates [24,25] which contain two Rs ubstituents at the 5-position (R = H, Me,o r Et). [26] Thep olymerization was followed by the addition of 3,5-dimethylphenyl isocyanatea sabulky end-capping agent to afford am acromolecular [2]rotaxane that is comprised of one wheel and apolymeric axle chain (4). Tr eatment of 4 with 2-isocyanatoethyl methacrylate for the modification of the ammonium group of the axle component afforded high overall yields of the RC_Rs, which bear two radically polymerizable vinyl groups.F or comparison, macromolecular covalent crosslinkers (CC_Rs; Scheme 1b)t hat possess identical polymer chains,c hain length, and two vinyl groups were synthesized starting from 1,4-benzenedimethanol instead of 3.T he structures of the RC_Rsa nd CC_Rsw ere determined using 1 HNMR spectroscopy,G PC,M ALDI-TOF-MS,a nd DSC measurements (see Figures S1-S6 in the Supporting Information).…”

Poly(aryl ether) bearing electroactive tetraaniline pendants and allyl groups: Synthesis, photo-crosslinking and electrochemical properties

“…Polymers networks, consisting of three‐dimensional assemblies of chemically and physically crosslinked chains, attract considerable attention due to their excellent chemical, physical and thermal properties . They are widely used in various applications such as coatings, adhesives, photoresists and printing inks . In all cases, the properties of crosslinkable polymer products, such as mechanical properties, scratch resistance, gas permeation, and chemicals resistance, could be easily altered and adjusted through the crosslinking process.…”

“…25,26 They are widely used in various applications such as coatings, adhesives, photoresists and printing inks. [27][28][29][30] In all cases, the properties of crosslinkable polymer products, such as mechanical properties, scratch resistance, gas permeation, and chemicals resistance, could be easily altered and adjusted through the crosslinking process. To the best of our knowledge, there are no reports achieving the measurement of electrochemical properties of polymer with different crosslinking degree.…”