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By adopting one step synthesizing method, the polymerization of directly aroma cyclizing of alkyne and nitrile is simple.

聚合反应通过炔腈直接芳环化,合成方法简单,采用一步法的合成方法,超支化聚合物显示出高亮度和高发光效率,具有耐高温,耐腐蚀,比重轻,强度高等特点,可望作为用于航天的高性能材料。

I don't have much allowance, so i can't overspend it.

我的零用钱不多,所以我不能超支

What makes this such a dazzler, besides the amazingly accomplished animation and the winning coterie of supporting characters (the Beast's mansion is overrun by quipping, dancing household items) is the array of beautiful and hilarious songs by composer Alan Menken and the late, lamented lyricist Howard Ashman.

是什么使这这样一个微笑,除了惊人的成就获奖的动画和小集团的支持字符(野兽的大厦是超支的quipping ,跳舞家庭用品)是一系列的美丽和热闹的歌曲作曲家艾伦曼肯和已故,感叹作词霍华德爱许曼。

The intrinsic viscosity and the radius of gyration of HPb were lower than that of its linear analog.

通过用多检测GPC(GPC与激光光散射、毛细管粘度计等检测手段联用)表征超支化聚氨酯及具有类似结构的线性聚合物,得到超支化聚氨酯HPb的结构因子ε为1.41,说明其具有高度支化的结构,特性粘数和均方旋转半径比相应线性聚氨酯小得多。

Such a phenomenon suggests that the outline of the hyperbranched polymers formed in the polycondensation of ABg type monomers is almost independent of the g at any specified conversion, since that the radius of gyration is decided by the shape and distribution.

这一现象表明在任何指定的A转化率,ABg型缩聚中形成的超支化聚合物的分子轮廓与g无关,随着2增大而在超支化聚合物中增加的结构单元(或聚合度1必定分布在分子内部。

The different synthesis methods of hyperbranched polyurethane are reviewed and the research directions of its application are also presented.

本文详尽分析了超支化聚氨酯的不同合成方法,并指出了超支化聚氨酯应用研究的主要方向。

It was showed hyperbranched polyester was more than commercial resinous polyols in impact resistance and transparency of matt topcoating film,and its extinction was worse.

超支化聚合物作为基料与脂肪酸等单体合成了超支化树脂,并利用红外光谱,GPC等仪器对超支化树脂进行表征;同时研究了超支化树脂在聚氨酯哑光面漆中的应用,研究表明:实验所制备的超支化树脂虽然消光效果较差,但是采用超支化树脂部分代替商业哑光树脂可以改善漆膜的透明性及耐冲击性。

High cation transference number is necessary for high performance polymer electrolytes. In this work, hyperbranched lithium polyglycidol sulfate was synthesized as a novel spherical macromolecular lithium salt.

提高锂离子迁移数是聚合物电解质的重要课题,为此本论文以超支化聚合物为母体,合成了一种新型的球状大分子锂盐——超支化聚缩水甘油硫酸锂,并用于微孔型聚合物电解质。

UV-curable hyperbranched poly was synthesized via organosilicon polymer bearing silicon hydride end groups and vinyltriallylsilane at the presence of Pt/C catalyst.

通过含硅氢键的超支化聚合物和乙烯基三烯丙基硅烷在铂催化剂作用下反应制备了可紫外光固化的超支化聚硅氧基硅烷。

The results of FT-IR 1H-NMR indicate the structure of polyester, and the 13C-NMR analysis of three quaternary carbon showed the existing of hyperbranched struscture, MALDI-TOF MS showed the hyperbranched polyester structure, the degree of branching of the polyesters determined by 13C-NMR being 0.408. The esterification reaction kinetics followed a second-order equation and the reaction rate was controled by the concemtration of carboxyl group and hydroxyl group,-d/dt=K.

以IR、1H-NMR证实了聚酯结构的存在,13C-NMR谱图上3种季碳的特征峰有力证实了超支化分子结构的存在,MALDI-TOF MS证明了超支化聚酯的成功合成,并计算超支化聚酯的支化度为0.408;探讨并建立了超支化聚酯的缩聚反应动力学方程-d/dt=K,该缩聚反应属于二级反应,反应速率由羟基浓度和羟基浓度共同决定。

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Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势,并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。

This dramatic range, steeper than the Himalayas, is the upturned rim of the eastern edge of Tibet, a plateau that has risen to 5 km in response to the slow but un stoppable collision of India with Asia that began about 55 million years ago and which continues unabated today.

这一引人注目的地域范围,比喜马拉雅山更加陡峭,是处于西藏东部边缘的朝上翻的边框地带。响应启始于约5500万年前的、缓慢的但却不可阻挡的印度与亚洲地壳板块碰撞,高原已上升至五千米,这种碰撞持续至今,毫无衰退。