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1.
文章采用直接浸泡法在多孔硅中嵌入了新型共轭有机聚合物聚[4-(N,N-二甲基胺丙氧基)苯-4,4’-二苯胺-9,9-二辛基芴-4,7-二噻吩-2-基-2,1,3-苯并噻二唑](PFTD),对比研究了多孔硅,PFTD/多孔硅,PFTD/硅以及PFTD在甲苯溶液中的光致发光特性。实验结果表明:PFTD/多孔硅复合膜光致发光强度要明显强于PFTD/硅,同时由于聚合物在固态时有效共轭程度增加导致PFTD/多孔硅复合膜的荧光光谱相对于甲苯溶液中的红光聚合物光谱有所红移。  相似文献   

2.
介绍了石墨烯/聚合物阻燃复合材料的制备方法,主要有溶液共混法、熔融共混法、原位聚合法和乳液混合法,综述了石墨烯在聚合物阻燃中的应用研究进展,阐述了石墨烯作为聚合物阻燃剂的阻燃机理。  相似文献   

3.
疏水缔合聚丙烯酰胺溶液的稳定性研究   总被引:3,自引:0,他引:3  
用粘度法研究了用模拟胜利油田盐水配制的疏水缔合聚丙烯酰胺溶液在高温下的稳定性。实验发现聚合物溶液粘度下降很快,硫脲和小分子醇类能明显增强聚合物溶液的高温稳定性。其中硫脲能起到抗氧剂的作用,在短期内能使溶液保持较好的稳定性;小分子醇类能与聚合物交联,使疏水缔合聚合物溶液的网状结构得以维持。用硫脲和自制的多羟基化合物以1∶5比例复配后的稳定剂结合了这两类物质的优点,当加入量为100mg/L时,使聚合物溶液的高温长期稳定性有了很大的提高。  相似文献   

4.
聚合物/高岭石嵌入纳米复合材料研究进展   总被引:5,自引:0,他引:5  
介绍了聚合物/高岭石嵌入纳米复合材料的制备方法,对嵌入过程的热力学和动力学分析进行了总结。展望了聚合物/高岭石嵌入纳米复合材料的应用前景。  相似文献   

5.
综述了工业生产中常用的聚合物-Bt复合材料的制备方法,重点对聚合单体插层原位聚合法、聚合物溶液插层法和聚合物熔融插层法的合成原理和基本性能进行了分析。同时评述了在建筑、污水处理、石油工程等领域中聚合物-Bt复合材料的工业应用及发展,并对今后聚合物-Bt复合材料的研究方向提出建议,以便为相关研究提供参考。  相似文献   

6.
薛伟  尹桂 《江苏化工》2007,35(3):1-7
介绍了碳纳米管的结构和碳纳米管/聚合物复合材料的制备方法——溶液共混法、熔融法、原位聚合法和化学修饰法等。结合碳纳米管的特性,综述了碳纳米管/聚合物复合材料在力学性能的增强、电极材料、生物医学材料等方面的应用。  相似文献   

7.
吴莹莹 《云南化工》2019,(7):142-143
从凝胶聚合物电解质的制备方法 (原位聚合法和溶液浇铸法)出发,对锂硫电池中凝胶聚合物电解质的应用展开了探究。  相似文献   

8.
陈辉  李兆敏  黄善波  王淑娟 《辽宁化工》2009,38(8):505-509,544
应用Physica MCR301旋转流变仪对含油聚合物流变性进行了系统研究。结果表明含油聚合物溶液与不含油聚合物溶液的表观粘度受到温度、质量浓度的影响的变化趋势近似,并且描述了含油聚合物溶液的表观粘度与含油率的关系。含油聚合物符合幂律流体的流变模式,用数学回归法对实验参数进行流变参数K、n值的回归。相比较而言,含油率比温度、质量浓度对聚合物假塑性流变特性影响大。  相似文献   

9.
有机涂层在纤维增强聚合物基复合材料中的应用   总被引:2,自引:0,他引:2  
介绍了不同涂层在纤维增强聚合物基复合材料中的应用和新近研究成果,其中包括偶联剂类(硅烷偶联剂、金属偶联剂)涂层和聚合物涂层(环氧树脂类和非环氧聚合物类),并综述了各种涂层方法(溶液浸渍法、界面原位聚合法、等离子体聚合法和电聚合法)的特点和应用研究进展。  相似文献   

10.
《应用化工》2022,(11):2459-2463
介绍了皂石/聚合物纳米复合材料主要的制备方法,即:溶液插层法、原位聚合法和熔融插层法,以及皂石在纳米复合材料中的作用。综述了制备方法、制备工艺条件对皂石/聚合物纳米复合材料性能的影响。分析了制备皂石/聚合物纳米复合材料现存的问题,对未来的研究进行了展望。  相似文献   

11.
聚合物/层状硅酸盐纳米复合材料   总被引:1,自引:0,他引:1  
目前,聚合物/层状硅酸盐纳米复合材料是重要的工程材料之一。由于层状硅酸盐的特殊结构,聚合物层状硅酸盐纳米复合材料的各项性能得到较大改善。聚合物/层状硅酸盐纳米材料的制备、表征、结构与性能的研究取得了重要进展。本文简要概述了聚合物/层状硅酸盐的结构及其有机改性机理,研究表明,插层剂和离子交换容量是插层的重要因素。最后,讨论了聚合物/层状硅酸盐纳米复合材料的制备方法和性能。  相似文献   

12.
生物可降解聚乳酸/层状硅酸盐纳米复合材料的研究进展   总被引:1,自引:0,他引:1  
生物可降解聚乳酸是一种具有广泛应用前景的环境友好型的生物高分子材料,但是其力学性能、热稳定性能不稳定。利用层状硅酸盐的特殊结构,以各种有机改性的层状硅酸盐为添加物,通过原位插层聚合、溶液插层、熔融插层和剥离-吸附等方法制备生物可降解聚乳酸/层状硅酸盐纳米复合材料,其力学性能、热稳定性、生物降解性等均有显著提高,其展现出极其广阔的应用前景。本文概述了近年来生物可降解聚乳酸/层状硅酸盐纳米复合材料的制备、结构、性能和应用等方面的研究进展,并且对各种制备方法进行了分析比较。  相似文献   

13.
Organic/Inorganic hybrid nanocomposites based on poly(styrene-butadiene-styrene) copolymer (SBS) and clay are fabricated by melt intercalation. The degree of intercalation is dependent on the surface properties of clay and SBS. The epoxized block in epoxized SBS acts as a strong attractive site with the clay surface, which yields the increased interlayer space in the layered silicates. It is also shown that the thermal stability of clay as well as the surface properties is very important in fabricating the polymer/clay nanocomposites. The rheological behavior of the SBS/clay nanocomposites is quite different from that of SBS itself. Both storage moduli and complex viscosity of the SBS/layered silicate nanocomposites increase and show non-terminal flow behavior.  相似文献   

14.
Tzong-Ming Wu  Chuh-Yi Liu 《Polymer》2005,46(15):5621-5629
In this study, poly(ethylene 2,6-naphthalate) (PEN)/layered silicate nanocomposites (PLSNs) were successfully prepared by the intercalation of PEN polymer into organically-modified layered montmorillonite through the melt blending process. Both X-ray diffraction data and transmission electron microscopy images of PEN/layered silicate nanocomposites indicate most of the swellable silicate layers were exfoliated and randomly dispersed into the PEN matrix. Mechanical and barrier properties of the fabricated nanocomposites performed by dynamic mechanical analysis and permeability analysis show significant improvements in the storage modulus and water permeability when compared to neat PEN. Differential scanning calorimeter (DSC) was used to investigate the isothermal crystallization behavior and melting behavior of PLSNs. DSC isothermal results revealed that the crystal growth process of PEN and PLSNs are a three-dimensional spherulitic growth. The activation energy of PEN increases with increasing content of layered silicates. The result indicates that the addition of layered silicate into PEN reduces the transportation ability of polymer chains during crystallization processes.  相似文献   

15.
In this study biocompatible/biodegradable poly(lactic acid) (PLA)/layered silicate nanocomposites (PLSNs) were successfully prepared by the intercalation of PLA polymer into organically modified layered silicate through the solution mixing process. Both X‐ray diffraction data and transmission electron microscopy images of PLSNs indicate most of the swellable silicate layers were disorderedly intercalated into the PLA matrix. Mechanical properties of the 0.1 wt% silicate‐containing fabricated nanocomposites performed by dynamic mechanical analysis have significant improvements in the storage modulus when compared to that of neat PLA matrix. Adding more layered silicates into PLA matrix induced a decrease in the mechanical properties of PLSNs, probably due to the presence of a large dimension of porosity in the fabricated nanocomposites. POLYM. ENG. SCI., 45:1615–1621, 2005. © 2005 Society of Plastics Engineers  相似文献   

16.
The preparation and properties of poly(4‐methyl‐1‐pentene) (PMP)/clay nanocomposites are reported. Melt intercalation of PMP is carried out with organoclays of different cation/charge exchange capacities and modifiers to facilitate intercalation of the polymer into the silicate layers. The effect of modifiers on the structure and properties of PMP/clay nanocomposites is explored. XRD patterns confirm the intercalation of polymer in the layered silicates as evidenced by the increase in the inter‐layer spacing which is dependent on the type of modifier used. Dynamic mechanical analysis shows increments in the storage modulus over the temperature range studied for all of the three clays, but the extent depends on the type of clay modifier used. The coefficient of thermal expansion is lower for all of the nanocomposites, as compared to the pristine polymer, indicating improved dimensional stability Copyright © 2003 Society of Chemical Industry  相似文献   

17.
熔融插层法制备聚合物/黏土纳米复合材料研究进展   总被引:1,自引:0,他引:1  
杨振  雷新荣  胡明安 《化工进展》2004,23(8):806-810
对国内外熔融插层法制备聚合物/黏土纳米复合材料(PCN)的研究进展进行了介绍。介绍了影响PCN结构形态的几种因素;对熔融插层法制备PCN的热力学、动力学的研究进行了总结;介绍了熔融插层的机理和几种理论模型。并对聚合物/黏土纳米复合材料的开发及应用前景作出了展望。  相似文献   

18.
Nanostructure of poly(ethylene‐co‐vinyl acetate)/organically modified montmorillonite (MMT; EVA/organoclay) nanocomposites prepared by melt intercalation process was investigated using X‐ray diffraction (XRD) and transmission electron microscopy (TEM). Three kinds of organoclays were used to see their influences on the nanostructure of the EVA hybrids. The effects of the polar interactions between the polymer and the silicate layers of organoclays were also investigated by grafting maleic anhydride onto EVA. It was found that the strong polar interactions between the polymer and the silicate layers of organoclays are critical to the formation of polymer‐layered silicate nanocomposites. The results also showed that increasing the mixing temperature was unfavorable to improve the dispersion of organoclays in the EVA matrix. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 87: 1901–1909, 2003  相似文献   

19.
Polymer/layered silicate nanocomposites represent an important class of materials in which polymer is hardened by homogeneously dispersed inorganic particles. The most widely used nanoclay is bentonite which mainly consists of montmorillonite. Nanoclays are known to form composites with epoxy resin, polystyrene, poly(methyl metacraylate), polyvinyl chloride, and ternary blends. An outline of advancement in polymer-layered silicate nanocomposite is presented with different preparation methods such as in situ polymerization, solution-induced intercalation, and melt processing. The property enhancement comprises increased strength, decreased flammability, higher modulus, thermal stability, and barrier properties. Thermal, mechanical, and nonflammability property improvement has resulted in automotive and industrial applications.  相似文献   

20.
高分子/层状硅酸盐纳米复合材料因其具有优越的性能、广泛的应用前景而成为目前材料科学研究的热点。简要介绍层状硅酸盐粘土的结构与性质;总结了高分子/层状硅酸盐纳米复合材料的制备方法以及目前国内外的研究进展;综述了高分子/层状硅酸盐纳米复合材料的应用现状;展望了高分子/层状硅酸盐纳米复合材料的发展前景。  相似文献   

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