Improvement in the storage stability of free radical photocurable materials under sunlight based on the cis → trans photoisomerization of pyrrole chalcone photoinitiator

Jingfang Li, Hongwei Lu, Hao Zheng, Jianyu Li, Yao Lu, Yongjie Wang, Xianju Zhou, Zhi-Cheng Fu, Jun Nie, Xiaoqun Zhu