Beijing National Laboratory for Molecular Sciences(BNLMS);
Key Laboratory of Polym.Chem.&Physics of Ministry of Education;
Department of Polymer Science&Engineering;
College of Chemistry and Molecular Engineering;
Center for Soft Matter Science and Engineering;
Peking University;
Beijing 100871;
China;
Poly(dithioacetal)s; Nucleophilic thiol-yne"click"polyaddition; Chemical recycling; Ring-chain equilibrium;