摘要
将合不同负离子的苄基紫精分散在混合有ＰＶＰ的ＭＭＡ－ＨＥＭＡ共聚物基质中可制成耐水的光致变色膜。它们的光致变色速度的大小随紫精负离子的不同而有如下序列：这与这些紫精在ＤＭＦ中的溶解度以及在共聚物基质中的溶解性大小的序列相一致．负离子对这些光致变色膜在空气中的氧化退色速度没有很大影响，对这些膜的光疲劳性能的影响也不大。将Ｖ３～Ｖ６分散在不很有ＰＶＰ的ＭＭＡ－ＨＥＭＡ共聚物基质中制成的膜也表现出光致变色的特性，表明它们的多原子负离子本身在聚合物膜中也能充当电子给体的角色．
The photochromic polymer films which are waterproof were prepared by using water-insoluble benzyl viologens bearing different anion embedded in the matrix of MMA-HEMA copolymer and a little PVP as electron donor. Their coloration rates depend on the composition of viologen's anion and has the following order: V6 (PF6)>V5(BF4)～V4 (CIO4)>V3 (PTS)>V2(Br-)～V1 (Cl-). This order is same as that of solubility of these viologens both in DMF and in the copolymer matrix. The viologen's anion has no influence on fading rate of the colored viologen-matrix polymer films in air and a lithe on the photofatigue of these films. The polymer films prepared by using viologen V3～V6 emdded in the same MMA-HEMA copolymer matrix but without any PVP also have photochromic behavior. This phenomenon shows that the complicate anion in these viologens can play the part of electron donor even in the polymer matrix.
出处
《功能高分子学报》
CAS
CSCD
1995年第2期149-154,共6页
Journal of Functional Polymers
