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论文类型：期刊论文

发表时间：2013-12-12

发表刊物：Advanced Materials Research

收录刊物：EI、CPCI-S、SCIE、Scopus

卷号：884-885

页面范围：51-54

ISSN号：9783037859957

关键字：dendritic effect; dendrigraft; photochromic; spiropyran

摘要：This paper demonstrated the photochromic behavior of two novel spiropyran functionalized dendrigraft polybutadiene with linear-comb and star-comb architectures (LC-PB-Sp and SC-PB-Sp, respectively). LC-PB-Sp and SC-PB-Sp were synthesized via the combination of anionic polymerization and "click" chemistry methodology. The photochromic behavior was investigated based on UV-Vis spectroscopy. The results showed that the coloring speed was in an order of v(Sp) > v(SC-PB-Sp) > v(LC-PB-Sp), while the discoloration speed exhibited in an order of v(SC-PB-Sp) > v(LC-PB-Sp) > v(Sp), suggesting that the nonpolar dendritic PB matrices tended to stabilize the nonpolar closed form of spiropyran. Furthermore, the retrieval rate of SC-PB-Sp was much faster than its corresponding LC-PB-Sp due to its more compact structure.