【摘 要】
：
Poly (acrylonitrile-methyl acrylate) copolymer was synthesized by water depositing polymerization and has a typical feed ratio of 85/15. And then 1 - 3 wt% laur
论文部分内容阅读
Poly (acrylonitrile-methyl acrylate) copolymer was synthesized by water depositing polymerization and has a typical feed ratio of 85/15. And then 1 - 3 wt% lauryl alcohol maleic anhydride (LAM) was adopted as stabilizer to mix with the acrylonitrile based copolymer. The mixtures were characterized by using Fourier Transform Infrared Spectroscopy (FTIR), Nuclear Magnetic Resonance (1H NMR ), Gel Permeation Chromatography ( GPC ), Differential Scanning Calorimetry (DSC), optic microscope and Ubbelohde viscosimetryr etc. The melting point (Tm) and glass transition temperature (Tg) of the 85/15 AN/MA copolymer mixed with LAM all decrease with the increase of stabilizer content. The lowest Tg and Tm were 116.1 ℃ and 209. 1℃ respectively at the heating rate of 100℃/min when the content of LAM is 2 wt%. The 85°/15 AN/MA copolymer mixed with 1 - 3 w t% LAM possess good thermal stability up to 30 min at 220 ℃.
其他文献
近年来粮食蔬菜价格连续走高,在经济不断发展,人民生活水平不断提高的今天,粮食蔬菜的价格上涨是大势所趋。而近年来发生的蔬菜收购价格暴跌菜贱伤农,蔬菜零售价格远远高于收
本文以政府是宏观的市场主体,企业是微观的市场主体为立足点,结合慈溪市近年来“以企引企”招商引资模式在实际运行中取得的成效、存在问题,围绕如何在政府引导下发挥企业在
Summary: The effects of tanshinone Ⅱ A (TSN) on transforming growth factor β1 (TGFβ1) signal transduction in renal interstitial fibroblasts of rats were stud
我国是世界上人口最多的国家，粮食安全问题不容忽视。影响我国粮食安全的主要因素有：人口数量的增长；耕地面积的减少；食物结构的升级；粮食单产提高的局限性；农业生产环境的恶化。解
It is generally believed that the expression of a gene iS restricted "within the right place and at the right time".This principle has long been considered appl
本文针对当今美术院校的学生在山水画临摹与写生的课程学习中所存在的一些困惑与问题，并结合自己在这方面的感受与实践经历，来谈谈关于山水画临摹与写生之间的转化问题，以此来解
城市森林建设作为城市生态环境的重要组成部分是与城市化协调发展最终实现可持续发展的重要途径，资源型城市终将面临资源枯竭的问题，怎样协调好资源型城市城市化发展与城市森林
Summary: The expression and possible role of integrin-focal adhesion kinase signal pathway in invasive pituitary adenomas were explored. Forty-nine human pituit
Summary: The effects of NO-Fluvastatin on proliferation of human lens epithelial cells (HLECs) and the action mechanism were investigated. Cell proliferation wa
新生代农民工职业培训需要职业院校承担更多的任务，这对双方和我国全面建设小康社会都有重大意义。要通过转变观念，更新理念，建立队伍，产学结合，争取支持，注重实效等措施开展职业院