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. 2021 Jun 30;14(13):3672. doi: 10.3390/ma14133672

Figure 6.

Figure 6

Failure locus after pull-off tests on solid oak wood: (A) adhesive failure mode on the untreated PLA/epoxy adhesive interface, (B) adhesive failure mode on the treated PLA/wood interface, and (C) mixed adhesive/cohesive failure mode on the treated PLA/wood interface.