共查询到20条相似文献,搜索用时 15 毫秒
1.
为了培养学生对高分子科学技术的专业兴趣,激发学习热情,浙江大学从2004年开始面向高分子材料专业本科生开设《高分子近代史》专业选修课。通过让同学们了解高分子科学和高分子工业的建立和发展历程,建立和加深学生对高分子科学和学科知识整体性、结构性的理解。以世界高分子发展和中国高分子发展的两条线索向同学们介绍高分子科学技术发展中的重要历史事件、涌现的著名高分子科学家、产生的具有历史性意义的研究成果与材料,给同学们展现高分子科学与技术发展的波澜壮阔的历史画卷。经过十多年的尝试和努力,《高分子近代史》课程在教学内容、授课方式和考核方式上均形成了自己的教学特色,受到了本科生的欢迎,对激发和培养同学们学习高分子的兴趣和热情,起到了积极的作用。 相似文献
2.
Otto Vogl 《高分子科学杂志,A辑:纯化学与应用化学》2013,50(11):xv-xx
When the chairman of this US-Japan Symposium on Polymer Synthesis, Professor Virgil Percec, asked me to tell you how the seminar series was conceived and what was involved in initiating such a successful enterprise, I was very pleased to agree to do so. The thoughtfulness of our Chairman reminded me of the writings of an ancient Chinese philosopher who said: “The one who drinks water should think of he who dug the well.” I am glad that we all are drinking the water! I am presenting here a brief history of the circumstances that led to the US-Japan Seminars on Polymer Synthesis, a cooperative program that I hope will continue for a long time. It was about 25 years ago that the initial idea of a US-Japan Seminar on Polymer Synthesis was realized. This concept led to the very successful first US-Japan Seminar in 1974. 相似文献
3.
4.
应用动态仿真工具Simulink,以Voigt-Kelvin模型为基础,根据Boltzmann叠加原理,模拟了聚合物在交变力场作用下的应力史效应。 相似文献
5.
高分子时代的天然高分子 总被引:10,自引:0,他引:10
本文从资源利用的战略角度讨论了发展及加强天然高分子研究的重要性。以几个天然高分子为例讨论了它们的研究动向及进展。与合成高分子相比,指出了天然高分子研究中存在的问题。文中对我国学者在这一领域中所作的卓越贡献做了简要介绍。 相似文献
6.
7.
聚合物接枝纳米颗粒(Polymer grafted nanoparticles,PGNPs)是一类重要的聚合物改性填料。由于表面聚合物链的存在,在一定条件下,PGNPs可以均匀地分散在聚合物基体中,形成"完全相容性"聚合物纳米复合材料。近年来,PGNPs填充聚合物体系的结构-性能关系研究已成为高分子学科的研究热点。本文主要概述了PGNPs的制备及其填充聚合物体系的结构-性能关系。从PGNPs的设计制备、PGNPs在聚合物基体中的分散行为、PGNPs纳米复合体系流变行为和纳米复合材料力学性能4个方面介绍了该领域已经取得的研究进展和现状,并展望该领域今后的发展前景和研究方向。 相似文献
8.
Jiun‐Tai Chen Ya‐Lan Chang Song Guo Omar Fabian William M. Lackowski Paul F. Barbara 《Macromolecular rapid communications》2011,32(7):598-603
We recently reported the discovery of soliton‐like electrogenerated chemiluminescence (ECL) waves from pure conjugated polymer films and gold‐nanoparticles‐doped polymer films. In addition to a more detailed study of these polymer systems by changing the film thickness and the distribution of local leaks, we also apply the ECL wave phenomenon to polymer blends of conjugated and nonconjugated polymers. Poly(9,9‐dioctylfluorene‐co‐benzothiadiazole) (F8BT) is used as the active material that is oxidized and produces ECL with the presence of a co‐reactant, tri‐n‐propylamine (TPA). Several factors such as film thickness, artificial leaks, and solubility of doped polymers are examined for their effects on the ECL behavior. When polystyrene (PS), less soluble in the electrolyte, is blended with F8BT, dotted ECL signals are observed and transported as waves. When poly(methyl methacrylate) (PMMA), more soluble in the electrolyte, is blended with F8BT, PMMA serves as local scratches and ECL waves are triggered simultaneously from the whole film.
9.
10.
11.
12.
13.
14.
Volodymyr Samaryk Sergiy Varvarenko Ihor Tarnavchyk Nataliya Nosova Nataliia Puzko Stanislav Voronov 《Macromolecular Symposia》2008,267(1):113-117
A principal possibility of the utilization of polymer peroxides for the modification of polymer surfaces that provides an immobilization of the tailored quantity of peroxide groups at them has been established. The processes of polymer surface activation with following “grafting from” or “grafting to” utilizing immobilized peroxide groups has been studied using a FTIR-ATR spectroscopy, ellipsometry and measurements of contact angles. The proposed technique of polymer surface activation is based on the universal ability of carbon chain polymer to participate the free radical reactions. 相似文献
15.
I. G. Voigt-Martin 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》1988,100(10):1459-1459
16.
17.
18.
F. P. Gay 《Journal of Polymer Science.Polymer Physics》1973,11(11):2227-2235
The thermal emission characteristics of polypyromellitimides have been examined as a function of temperature by measurement of the power required to maintain steady-state temperatures in an evacuated system. The emissivity was derived and found to increase with increasing temperature up to a saturation limit of above 0.9 at temperatures above 475°K. The effect is explained as a thermal population of excited infrared transitions. Power emitted is dominated by the most intense bands which are common to absorption and emission spectra. 相似文献
19.
Yn-Hwang Lin 《高分子科学》2005,23(2)
In this book, the studies of the Rouse, Doi-Edwards, and extended reptation theories are developed in a consistent manner from a basic level and discussed in detail.Viscoelastic properties of nearly monodisperse linear flexible polymers in both the entanglement and entanglement-free regions are analyzed quantitatively in terms of the molecular theories. 相似文献
20.
J. A. Martins J. J. C. Cruz-Pinto M. J. Oliveira 《Journal of Thermal Analysis and Calorimetry》1993,40(2):629-636
Differential scanning calorimetry (dual furnace, null-balance, DSC) and optical microscopy (OM) have been used to study the isothermal crystallization kinetics of poly(oxymethylene)-POM. The non-isothermal crystallization of the same material has also been studied by optical microscopy. A very controversial problem is whether the isothermal kinetic parameters may be applied to describe the non-isothermal crystallization. The results show that the kinetic spherulite growth parameters obtained by non-isothermal optical microscopy are, within the experimental errors involved, the same as those obtained by isothermal optical microscopy or isothermal DSC. The importance of this finding is highlighted. 相似文献