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防 X 射线共混纤维织物的制备与性能研究
探讨纳米硫酸钡再生纤维素共混纤维织物的制备与防X射线效果和影响因素。将纳米硫酸钡加入再生纤维素纺丝液制备出不同的纳米硫酸钡共混纤维，并通过织袜机分别织造出试样。利用扫描电子显微镜、傅立叶红外分析、X射线衍射等表征共混纤维的形态和结构，并测试了各试样的耐水洗性。利用医用数字化X射线摄影系统拍摄了共混纤维及其织物的X光片，以X光片的相对灰度值表征防X射线效果。结果表明：共混纤维内纳米硫酸钡与再生纤维素在非结...
http://www.polymer.cnt//ss/qulijun/publicationsshow_8910.html |
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高钨含量尼龙6复合材料X射线屏蔽性能研究
摘要：利用计算机断层扫描（CT）仪对高钨含量尼龙6复合材料的X射线屏蔽性能进行了研究。结果表明：该尼龙6复合材料对X射线屏蔽性能随密度、厚度增大而提高，同时遵守朗伯-比耳定律；密度为10．3g／cm^3的尼龙6复合材料具有与铅近似的屏蔽效果。
http://www.polymer.cnt//ss/liyunbo/publicationsshow_3489.html |
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High performance organic nonvolatile memory transistors based on HfO2 and poly(alpha-methylstyrene) electret hybrid charge-trapping layers
In this work, we fabricated a high performance flash-type organic nonvolatile memory transistor, which adopted polymer-electret poly(a-methylstyrene) (PaMS) and HfO2 films as hybrid charge trapping layer (CTL). Compared with a single HfO2 or PaMS CTL structure, the hybrid HfO2/PaMS CTL structure can provide enhanced charge trapping efficiency to increase the device operation speed and reduce the...
http://www.polymer.cnt//ss/Luxubing/publicationsshow_12572.html |
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Organoselenium-Catalyzed Baeyer-Villiger Oxidation of alpha,beta-Unsaturated Ketones by Hydrogen Peroxide to Access Vinyl Esters
By carefully screening the organoselenium pre-catalysts and optimizing the reaction conditions, simple dibenzyl diselenide was found to be the best pre-catalyst for Baeyer–Villiger oxidation of (E)-α,β-unsaturated ketones with the green oxidant hydrogen peroxide at room temperature. The organoselenium catalyst used in this reaction could be recycled and reused several times. This new method was...
http://www.polymer.cnt//ss/zhangming/publicationsshow_10529.html |
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alpha-Helix C-Terminus Acting as a Relay to Mediate Long-Range Hole Migration in Proteins
Ab initio calculations suggest that the C-terminus of an α-helix can serve as a novel relay element for long-range charge migration in proteins, as an addition or alternative to the known relay properties of aromatic and S-containing amino acids. The relay ability of an α-helical C-terminus varies with helix length, capping, proximal group competition, and helix twisting/bending. The vertical io...
http://www.polymer.cnt//ss/chenxiaohua/publicationsshow_9095.html |
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Complexation behavior of alpha-, beta- and gamma-cyclodextrin in modulating and contructing polymer networks. Langmuir 2008, 24 (15), 8290-8296.
Complexation behavior of alpha-, beta- and gamma-cyclodextrin in modulating and contructing polymer networks.
http://www.polymer.cnt//ss/guoxuhong/publicationsshow_2214.html |
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Functionalized poly(alpha-hydroxy acid)s via ring-opening polymerization: Toward hydrophilic polyesters with pendant hydroxyl groups
Two functionalized dilactones with protected hydroxyl groups, benzyloxymethyl methyl glycolide (4a) and benzyloxymethyl glycolide (4b), were synthesized and converted to the corresponding polyesters by ring-opening polymerization in the melt ( at 110 degrees C using benzyl alcohol and SnOct(2) as initiator and catalyst, respectively, and at 130 degrees C using SnOct(2) as catalyst or in solution a...
http://www.polymer.cnt//ss/zhongzhiyuan/publicationsshow_1001.html |
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Novel donor-acceptor materials for organic light-emitting diodes based on alpha-cinnamoyl cyclic ketene dithioacetals
作者: Peng P (Peng, Ping), Sun SG (Sun, Shaoguang), Zhao YX (Zhao, Yixin), Wu WC (Wu, Weicai), Xia HJ (Xia, Haijian), Tian WJ (Tian, Wenjing), Liu Q (Liu, Qun)
来源出版物: JOURNAL OF LUMINESCENCE 卷: 126 期: 2 页: 464-468 出版年: OCT 2007 &...
http://www.polymer.cnt//ss/tianwenjing/publicationsshow_918.html |
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γ射线辐照对POE/Mg(OH)2热性能和力学性能影响的研究
聚烯烃弹性体(POE)具有高弹性、高强度、高伸长率、良好的低温性能，以及优异的耐热老化性能，既可用作橡胶，又可用作热塑性弹性体。但是由于POE材料本身极限氧指数低，使用的上限温度较低以及POE复合材料的力学性能差等问题，很少用作基体材料。为了进一步提高POE应用范围，对其进行改性来满足现实生活的使用要求具有学术价值[1-4]。针对阻燃性能低以及加入阻燃剂使POE复合材料的力学性能以及热稳定性能下降等问题，近年来发展...
http://www.polymer.cn/research/sy_info18783 |
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同步辐射X射线成像技术原位研究高分子复合材料的填料网
高分子纳米复合材料的优异力学性能除了高分子链网络的贡献外，其内部的纳米填料由于填料本身相互作用形成的填料网络对复合材料的力学性能也起到了重要的促进作用，有时填料网络结构对高分子复合材料的力学性能的提高起着决定性作用，但受制于填料网络结构的复杂性以及研究方法和技术手段的限制，这一填料网络结构对复合材料力学性能的贡献以及结构演化和力学性能的关系还不清楚。
http://www.polymer.cn/research/sy_info18345 |
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