Toward simultaneous toughening and reinforcing of trifunctional epoxies by low loading flexible reactive triblock copolymers.

ABSTRACT: Flexible reactive poly(glycidyl methacrylate)-b-poly(propylene glycol)-b-poly(glycidyl methacrylate) (GPG) and nonreactive poly(ethylene glycol)-b-poly(propylene glycol)-b-poly(ethylene glycol) (EPE80) were utilized to toughen a trifunctional epoxy (diglycidyl 4, 5-epoxycyclohexane-1, 2-dicarboxylate, TDE-85). In comparison with the nonreactive EPE80 and reactive GPG92 with long reactive blocks (L _reactive), the incorporation of reactive GPG83 with short L _reactive improved the comprehensive mechanical properties of the epoxy. Upon an optimal GPG83 loading of 2.5 wt%, the tensile strength, elongation at break and critical strain energy release rate (G _1c) increased by ca. 31%, 45.9% and 130.8%, respect

SUBMITTER: Tang B 

PROVIDER: S-EPMC9080404 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature