Design of “Zn2+ Salt-Bondings” Cross-Linked Carboxylated Styrene Butadiene Rubber with Reprocessing and Recycling Ability via Rearrangements of Ionic Cross-Linkings

• DOI: 10.1021/acssuschemeng.6b01897
• Publication Date: 2016-10-21T02:22:16Z
• Authors: Chuanhui Xu; Xunhui Huang; Conghui Li; Yukun Chen; Baofeng Lin; Xingquan Liang
• Keywords: Styrene-butadiene; Non-covalent interactions; Styrene oxide

Constructing a reversible supramolecular network cross-linked by noncovalent bonds is an effective approach to realize self-healing as well reprocessing and recycling for rubbers. Unfortunately, in most case the resultant rubbers cannot hold enough forces meet routine applications. In this paper, our strategy was based on simple reaction between carboxy groups carboxylated styrene butadiene rubber (XSBR) zinc oxide (ZnO), where formed Zn2+ salt bondings connect separate XSBR molecules. The further self-aggregation of ion pairs salts resulted ionic network, whose rearrangements brought excellent reprocessing/recycling ability. Additionally, reclaimed exhibited valuable mechanical properties due compensation additional new during recycling. fresh with 5 wt % showed tensile strength 6.7 MPa, it increased 10.3 MPa after 3 recycles, which far higher than reported This study thus opens up avenue extending recyclable considerable various engineering