Han, Jiseok Joo, Juntae Park, Sangmin Byun, Wonmoo Noh, Guk-Yun Hwang, Jae Hyuk Lee, Woohwa Chae, Chang-Geun Park, Sungmin Kim, Hyun Kim, Yong Seok Choi, Jae-Hak Choi, Yong-Seok Kim, Dong-Gyun 2025-12-23T06:31:02Z 2025-12-23T06:31:02Z 2025-12-19 2026-02 2159-6859 https://pubs.kist.re.kr/handle/201004/153864 We report thiourea-based polymer networks (TPNs) synthesized via a simple, by-product-free polyaddition using aromatic diisothiocyanates, short-chain alkylenediamines, and a triamine crosslinker. The TPNs exhibit excellent mechanical performance (tensile strength up to ≈74 MPa, elastic modulus of ≈2.4 GPa) along with thermadapt shape memory behaviors. Thiourea moieties act as dual-functional motifs, forming dense hydrogen-bonding interactions while enabling dynamic covalent bond exchange at elevated temperatures. This duality allows for catalyst-free thermal reprocessing and chemical recycling without compromising mechanical integrity. These findings highlight the potential of TPNs as robust, thermally adaptive, and recyclable materials for sustainable and intelligent structural applications. English Cambridge University Press Strong and stiff thiourea-based polymer networks with thermadapt shape memory and on-demand recycling capabilities Article 10.1557/s43579-025-00884-w 1 MRS Communications, v.16, pp.103 - 111 MRS Communications 16 103 111 N scie scopus 2-s2.0-105022831605 Materials Science, Multidisciplinary Materials Science Article; Early Access Polymer Recycling Shape memory Shape-shifting Sustainability