T and solidify in the crack, socoating with no microcaps expansion ofthe cracks, and also the cracks will continue to expandisunder the con generate cracks and harm. Nevertheless, the coating with no microcapsules prone to generate the cracks, and also the cracks will continue to expand beneath the continuous action of environmental factors. It is directly proved that microcapsules can imp of environmental elements. It is actually straight proved that microcapsules can strengthen the aging resistance thermal stability of waterborne coatings. resistance and and thermal stability of waterborne coatings.Figure 12. 12. SEM pictures of coatingand with microcapsulesmicrocapsules C in oven: Figure SEM photos of coating devoid of without and with after aging at 120 after aging (A) without the need of microcapsules,with 6.0 microcapsules. devoid of microcapsules, (B) (B) with six.0 microcapsules.atAppl. Sci. 2021, 11,15 ofFigure 12. SEM images of coating without the need of and with microcapsules after aging at 120 in oven: (A) Figure 12. SEM pictures of coating without the need of and with microcapsules after aging at 120 in oven: (A) with out microcapsules, (B) with six.0 microcapsules. without the need of microcapsules, (B) with 6.0 microcapsules.Figure 13. SEM photos of coating with no and with microcapsules following aging at 160 in oven: (A) Figure 13. SEM pictures of coating with no and with microcapsules after aging at at 160 Coven: (A) Figure 13. SEM photos of coating without and with microcapsules just after aging 160 in in oven: without the need of microcapsules, (B) with 6.0 microcapsules. (A) without the need of microcapsules, (B) with 6.0 microcapsules. without microcapsules, (B) with 6.0 microcapsules.Appl. Sci. 2021, 11, x FOR PEER REVIEWFigure 14. SEM images of coating devoid of and with microcapsules following aging in UV climate 4-1BBR/TNFRSF9 Protein Human reFigure 14. SEM pictures of coating without having and with microcapsules soon after aging UV climate reFigure 14. SEM images of coating with no and with microcapsules right after aging in in UV climate sistance test: (A) without microcapsules, (B) with six.0 microcapsules. sistance test: (A) with no microcapsules, (B) with six.0 microcapsules. resistance test: (A) with out microcapsules, (B) with six.0 microcapsules.16 ofThe adjust of chemical composition of waterborne coatings without the need of microcapsules The adjust of chemical composition of waterborne coatings with out microcapsules prior to and right after aging tests could be observed in Figure 15. The characteristic absorption prior to and just after aging tests can be observed in Figure 15. The characteristic absorption peaks of methyl and methylene are at 2943 cm1 and 2875 cm1. The characteristic absorppeaks of methyl and methylene are at 2943 cm1 and 2875 cm1 . The characteristic tion peak of OH is at 1731 cm1, and also the characteristic absorption peak of carbon oxygen absorption peak of OH is at 1731 cm1 , along with the characteristic absorption peak of carbon 1 single bond in ester group is at 1166is at . The cm1 . The chemical composition of the oxygen single bond in ester group cm 1166 chemical composition of the waterborne coating prior to and right after aging doesn’t aging does not adjust, indicating that the cause waterborne coating ahead of and soon after alter, indicating that the aging test will not aging chemical not lead to chemical reaction of theis the infrared spectrum from the coating with test will reaction in the coating. Figure 16 coating. Figure 16 would be the infrared spectrum six.0 microcapsule before and right after aging. It is actually observed that the characteristic peak posiof the coating with six.0 microcapsule prior to a.
