【摘 要】
：
Under the specially designated condition the polymerization of both tetrahydrofuran (THF) and tert-butyl methacrylate (tBMA) is a living one. The diblock copoly
【机 构】
：
College of Chemistry and Chemical Technology
论文部分内容阅读
Under the specially designated condition the polymerization of both tetrahydrofuran (THF) and tert-butyl methacrylate (tBMA) is a living one. The diblock copolymer, poly(tert-butyl methacrylate)-block-polytetrahydrofuran (PtBMA-b-PTHF), was successfully synthesized by means of the coupling reaction of living cationic PTHF+, SbF6- with living anionic PtBMA-, Li+. LiCl, which has a beneficial effect on the molecular weight distribution (MWD) in the anionic polymerization of (meth)acrylates, hinders the coupling reaction of living chains and cannot be used in the preparation of tBMA precursor. The hydrolysis of the aforementioned diblock copolymer under acid condition results in the amphiphilic diblock copolymer, i.e. poly(methyl acrylic acid)-block-polytetra- hydrofuran (PMAA-b-PTHF). The diblock copolymers were characterized with GPC and IR.
其他文献
本文通过对成段更换长轨奈施工的关键环节、影响因素进行分析探讨，从优化施工组织、提高安全卡控方面制定具体措施。强化更换长轨条施工安全组织管理。
本文依据一元关联函数的基本概念和初等关联函数的可拓变换定义,首次将关联函数的可拓变换应用于豆田天敌蝽类的生态研究,为控制害虫发生,更好地保护维持生态平衡的重要天敌
沥青表面处治是对沥青和细粒料用层铺或拌和的方法进行施工,其厚度不能大于3 cm薄层路面面层。处治层比较薄,通常对于强度提高无法起作用,提高公路的平整度、防水、抵抗行车
在夸克势模型的框架下 ,用屏蔽质量与介质温度和密度的关系 ,研究了ψ′在热力学介质中的轻子衰变和辐射跃迁
In the framework of the quark potential model, the relatio
A sufficient and necessary condition is given for the action of the quotient of a Poisson-Lie group G on the quotient of a Poisson G-space P to be a Poisson act
一．说教材1．教材简说《跨越海峡的生命桥》是义务教育课程标准实验教材四年级上册第六单元“人间真情”专题的一篇讲读课文。课文以平实的语言向我们讲述了一个真实的故事：台湾
在单态和多态耦合两种情况下,讨论了在BEPC/BES(北京正负电子对撞机/北京谱仪)上,通过J/ψ衰变过程J/ψ→V+X,X→a2+π寻找同位旋标量1-+奇特态的可能性.结果表明,对于J/ψ的
Cytochrome c activates apoptosis specific protease XCPP32 when being added to Xenopus laevis egg extracts, and induces apoptosis in this cell-free system. Durin
We study the self-diffusion of adatom on Pt(100) surface by molecular dynamics. The metal is modeled by the surface embedded-atom potential. Besides the convent
This paper shows that for any given level of significance α∈(0,1), and any sample size n, the Cramer-von Mises test is not unbiased.