Thermo-molded self-healing thermoplastics containing multilayer microreactors

Self-healing polyvinyl chloride (PVC) based on microencapsulated nucleophilic thiol-click chemistry

“…9 shows that the impact strength of the PVC composites decreases with increasing capsule content. This decline in ductility has also been reported for self-healing composites filled with microcapsules containing fluidic healing agent [22,23]. Comparatively, the reduction in the present study is not prominent.…”

“…More importantly, the healing speed is greatly increased as compared with those of other self-healing thermoplastics. For example, selfhealing PS based on atom transfer radical polymerization required 48 h to yield the highest healing efficiency [23]. Our system requires 2 h at 25 C to attain a healing efficiency of 96.8%.…”

“…Subsequently, the robustness of the healing capsules to withstand the thermal forming of thermoplastics became an important topic [23,26]. More recently, a heatresisting and air-insensitive healing agent was fabricated [24].…”

Microcapsule-based self-healing materials

“…Inorganic materials (like silica and glass) and even metal [31] are employed to build up capsules' shell wall, providing much lower permeability and improved durability. In the case of thermoplastics, melt mixing of specially designed microencapsulated healing agent and matrix polymer proves to be feasible [25,81], which might eventually replace the environmentally unfriendly solution blending and casting.…”

“…Accordingly, Zhu et al [81] designed a robust sphere-like multilayer microreactor based on ATRP chemistry (Figure 4.5). Both reactive healant (GMA) and its living polymerization catalyst were separately protected within the microreactors.…”