在欧洲和美洲,亚历山大·冯·洪堡(Alexander von Humboldt)(1769~1859)是公认的博物学家、人类学家、游记作家和画家。他已成为文化理解和跨学科研究、殖民主义批判及早期生态学的标志性人物。委内瑞拉、古巴、哥伦比亚、厄瓜多尔、秘鲁、墨西哥以及美国都竖立了他的雕像;街道、广场、学校、研究机构、国家公园、美国一个州(译者注:艾奥瓦州)的下辖县.
Two novel reactive monomers 2,4 bis(2 allyl phenoxy) 6 N,N dialkylamino 1,3,5 triazine (alkyl=methyl, ethyl) were synthesized in one pot reaction of cyanuric chloride, 2 allyl phenol with dialkylamine in acetone/water in the presence of aq. NaOH. The products have been characterized by FTIR, 1H NMR, 13 C NMR and elemental analysis.
The properties of 2,4 bis(2 allylphenoxy) 6 N,N dialkylamino 1,3,5 triazine(alkyl=CH 3(BAPDMT),C 2H 5(BAPDET)) and bis(4 maleimidodiphenyl)methane(BMDPM) copolymers were stu died . The results showed that the triazine monomers could improve the impact strength and shear strength of BMDPM homopolymer without strongly decreasing the heat resistance of the resin. The better results were obtained when the molar ratio of BMDPM to triazine was 4∶1.
