Rubber to Rubber Adhesion

Tough tetrazine-functionalized styrene–butadiene rubber with self-adhesion through zinc–nitrogen coordination

“…The solution was then concentrated under reduced pressure, before the thus obtained residue was subjected to column chromatography on silica gel using acetone/n-hexane 5/95 (v/v) to give 0.612 g (1.92 mmol, 96%) of DPT-CO as a yellow solid. 1 This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.…”

“…Adhesion between cross-linked rubbers is one of the most important processes for engineering the manufacture of rubber products. 1 However, it is commonly known that direct adhesion between cross-linked rubbers without treatment of the rubber surfaces is quite difficult due to the restricted polymer-chain mobility on account of cross-linking, [1][2][3][4][5] and therefore, it is not surprising that pretreatment methods for rubber-surface modifications and adhesive technology have been widely studied. 1,[6][7][8][9][10][11][12][13] Nonetheless, repair processes, such as tyre retreading, for cured rubber products that involve an adhesion process between cross-linked rubbers are still limited given several issues with the processes, including curing temperature and time.…”

“…1 However, it is commonly known that direct adhesion between cross-linked rubbers without treatment of the rubber surfaces is quite difficult due to the restricted polymer-chain mobility on account of cross-linking, [1][2][3][4][5] and therefore, it is not surprising that pretreatment methods for rubber-surface modifications and adhesive technology have been widely studied. 1,[6][7][8][9][10][11][12][13] Nonetheless, repair processes, such as tyre retreading, for cured rubber products that involve an adhesion process between cross-linked rubbers are still limited given several issues with the processes, including curing temperature and time. [14][15][16][17][18] To develop a more efficient adhesion system, it is important to induce the interdiffusion of polymer chains between two cured rubber samples during an adhesion process, such as heat-pressing, followed by interlinkage between the two rubber samples after cooling.…”

“…[14][15][16][17][18] To develop a more efficient adhesion system, it is important to induce the interdiffusion of polymer chains between two cured rubber samples during an adhesion process, such as heat-pressing, followed by interlinkage between the two rubber samples after cooling. Hence, the introduction of reversible linkages, 1,[19][20][21][22] such as hydrogen bonds, [23][24][25][26] ionic interactions, [27][28][29][30][31][32][33] host-guest interactions, 34,35 dynamic covalent bonds [36][37][38][39][40][41][42][43][44][45] and metal-ligand coordination bonds, 25,[46][47][48][49][50][51][52][53][54][55] given that introducing cross-linking bonds into cured rubber is a potential strategy to achieve direct adhesion between cross-linked rubbers, as reversible linkages often show a temperature dependence that is different from that of conventional covalent bonds, which results in good malleability at high temp...…”

“…PolymerButadiene(1,4 unit : 1,2 unit) : styrene : DPT a (mol%) 77.3 : 8.4) : 14.3 : -141 606 2.45 −68.4 DPT-SBR1 84.7 (76.6 : 8.1) : 14.6 : 0.7 81 800 1.78 −65.1 DPT-SBR2 83.6 (75.9 : 7.7) : 15.1 : 1.3 75 096 1.76 −53.5 DPT-SBR3 81.7 (74.1 : 7.6) : 15.7 : 2.6 60 303 1.76 −52.0 Determined by 1 H NMR spectroscopy. b Determined by GPC based on polystyrene standards (eluent: THF).…”