FIGURE 2.

Factors affecting ultrasonic responsiveness of carrier materials. (A) Effect of bond strength on mechanochemical activation. Reproduced with permission.^{[ 59 ]} Copyright 2015, American Chemical Society. (B) (i) Relationship of molecular weight and (ii) degree of polymerization to mechanochemical activation of polymers. Reproduced with permission.^{[ 62 ]} Copyright 2016, American Chemical Society. (C) Influence of molecular weight distribution on scission of mechanophore. Reproduced with permission.^{[ 65 ]} Copyright 2015, Royal Society of Chemistry. (D) A general depiction of chain breaks in polymers of different shapes. Reproduced with permission.^{[ 71 ]} Copyright 2014, American Chemical Society. (E) Molecular structure affects polymer mechanochemistry. Reproduced with permission.^{[ 74 ]} Copyright 2013, Springer Nature. (F) Ultrasonic response of symmetric copolymer nanomicelles. Reproduced with permission.^{[ 80 ]} Copyright 2015, American Chemical Society. (G) Response of polymer‐grafted NPs to mechanical activation. Reproduced with permission.^{[ 86 ]} Copyright 2014, American Chemical Society