Epoxy monomers consolidant for lime plaster cured via a redox activated cationic polymerization

Epoxy resins, widely used in conservation, still remain controversial materials. Considering some of the drawbacks that currently limit the application of epoxy consolidants, we present the application of the cationic ring opening polymerization as a novel method to cure the epoxy monomer in the restoration field. The cationic polymerization was carried out through a redox system based on the reduction of the iodonium salt in the presence of ascorbic acid catalyzed by a copper salt. The use of this initiator system for carrying out a suitable consolidant for lime plaster is considered. First, the film properties of the cured films were investigated. Then, the formulation was applied on a sample of plaster and its compatibility was verified. Its effectiveness as a consolidant product is explored through the evaluation of chromatic changes, mechanical strength, morphology of the re-aggregated material, and changes of the surface properties.     

论日本“殖产兴业”主导者的政策理念

作为一个历史时期的“殖产兴业”可分为三个阶段,各阶段主导者具有不同的政策理念。第一阶段,由利公正提出了以“劳动力论”和“纸币论”为核心的政策构想,并据以推行了“由利财政”。第二阶段,大久保利通以不仅需引进西方产业技术和制度,更应努力实现原有产业现代化,扶植民营企业为基本构想,提出了由“民富”达到“国强”的政策主张。大久保利通遇刺后,大隈重信以“开源节流”为目的,先后提出了“外债论”和“三议一件”构想。第三阶段,大藏卿松方正义以“制定货币运用之基轴”为构想,主导设立了日本中央银行——日本银行,开展了以“纸币整理”为核心的“松方财政”。同时,松方正义继承大隈重信的方针,将经营不善的官营企业转为民营,影响极为深远。     

浅谈活性碳阳离子聚合研究进展

简述了近 2 0年来活性碳阳离子聚合的发展状况以及在新单体和新型引发剂探索进程中的研究进展