Cho Sung-Youl, Kim Joong-Gon, Chung Chan-Moon
Department of Chemistry, Yonsei University, Wonju, Kangwon-do 220-710, Korea.
J Nanosci Nanotechnol. 2010 Oct;10(10):6972-6. doi: 10.1166/jnn.2010.2953.
Four kinds of cinnamate-type monomers were synthesized as healing agents. Photoirradiation of the monomers gave cyclobutane-containing crosslinked polymers via [2+2] cycloaddition. Cyclobutane cleavage upon cracking of the crosslinked polymers and re-cycloaddition of the cracked polymers were investigated by FT-IR spectroscopy. Photochemical crack healing was demonstrated by measurement of flexural strength of crosslinked, cracked, and healed polymers. It was observed that microcracks with width of 200 nm to 2 microm were healed by photoirradiation.
合成了四种肉桂酸酯型单体作为修复剂。单体经光辐照通过[2+2]环加成反应生成含环丁烷的交联聚合物。通过傅里叶变换红外光谱（FT-IR）研究了交联聚合物开裂时环丁烷的裂解以及裂解聚合物的再环加成反应。通过测量交联、开裂和修复后聚合物的弯曲强度，证明了光化学裂纹修复。观察到宽度为200纳米至2微米的微裂纹通过光辐照得以修复。
