共查询到19条相似文献,搜索用时 187 毫秒
1.
聚烯烃/CaCO3复合技术 总被引:14,自引:0,他引:14
本文以低韧性HDPE树脂和低韧性PP树脂为例,从CaCO3对基体树脂的增韧化、超韧化、增强增韧化等角度,介绍了高性能聚烯烃/CaCO3复合材料制造的基本技术形态。本技术涉及CaCO3表面高效活化、高性能CaCO3母料,高性能聚烯烃/CaCO3复合专用料及高附加值产品生产等应用领域。 相似文献
2.
3.
本文综述了聚合物纳米复合材料的发展现状。聚合物纳米复合材料的力学性能、气体阻隔性能、阻燃性能和导电性能大幅提高,市场应用潜力巨大。但由于成本等方面的原因,其应用市场发展不尽人意。随着技术的不断发展,聚合物纳米复合材料的应用将会逐步拓广。 相似文献
4.
5.
6.
7.
8.
9.
10.
聚烯烃类塑料产量大、应用范围广,但其粘接问题却一直没有得到好的解决,是一个世界性难题。北京师范大学汪辉亮副教授开发出的“提高聚烯烃粘结性能的表面改性新技术”很好地解决了这一难题。该技术采用紫外表面接枝的方法对聚烯烃进行改性,经这种表面接枝技术处理后的高密度聚乙烯(HDPE)之间的粘接强度大于聚乙烯本体强度,在180度T型剥离测试中,HDPE(2mm厚)本身被拉断,剥离强度大于150N/cm。 相似文献
11.
12.
本文研究了软泥类玩具材料中硼酸和硼酸盐含量的检测方法,用0.07 mol/L盐酸溶液提取试样,电感耦合等离子体质谱KED模式分析同位素11B,通过硼元素的含量换算成硼酸和硼酸盐来确定软泥类玩具材料中硼酸和硼酸盐的含量。硼元素浓度在2~1000μg/L与其响应值呈线性关系(R^2=0.99984),硼元素、硼酸、硼酸盐的检出限分别为0.042 mg/kg、0.240mg/kg和0.369 mg/kg,定量限分别为0.100 mg/kg、0.572 mg/kg和0.883 mg/kg,加标回收率为87.5%~105.3%,相对标准偏差(RSD,n=7)小于5%。该方法准确度高、精密度好,满足软泥类玩具材料中硼酸和硼酸盐的测定。 相似文献
13.
本文采用红外光谱-热分级(FTIR-DSC)方法研究共聚物的组成与含量。其方法是利用傅立叶变换红外光谱(FTIR)研究了与不同α-烯烃共聚合的多种聚乙烯,并对共聚物韵结构和类型进行了定性分析。由1378cm^-1、1369cm^-1处的峰位和峰强来判断聚烯烃的种类,由770cm^-1、899cm^-1、784cm^-1处的峰可判断α-烯烃的种类。利用差示扫描量热(DSC)热分级方法确定熔融峰的位置,并利用公式:-ln(CH2)=-0.331+135.5/T,对共聚物中α-烯烃的含量进行了定量计算,据此建立了快速鉴别聚烯烃共聚物的方法,并在实际应用中取得很好的效果。 相似文献
14.
本文着力于探究惠山泥人这一民间艺术资源,并在此基础上将惠山泥人艺术放在当代文化产业发展的视野中去研究,将区域性的传统泥人文化与当代社会文化情境相联系,分析了当前惠山泥人艺术的发展状况,重点研究了惠山泥人艺术的发展思路与对策,提出将惠山泥人的艺术价值、审美价值、与社会经济价值相联系,从传承泥人艺术、发展泥艺产业、整合泥艺资源出发创新与开发新产品,使中国惠山泥人非物质文化遗产能够原生态地得以传承发展。 相似文献
15.
Samples of cotton, polyester and nylon fabrics were soiled by application of synthetic sebum and clay and then laundered at various combinations of hot, warm and cold wash and rinse water temperatures. The temperature of the rinse water did not affect the amount of soil removed from the fabrics. More soil was generally removed with hot wash water than with warm or cold water. The soil was more readily removed from the nylon than from the cotton or polyester fabrics. All wash/rinse treatments removed soil to a level that would probably be acceptable to most consumers. 相似文献
16.
JAI O. KIM BETTY F. SMITH STEVEN M. SPIVAK 《International Journal of Consumer Studies》1987,11(3):219-235
A comparison of three different detergents was made by evaluating their properties of soil removal, soil redeposition and calcium carbonate deposition. The detergents included a phosphate granular detergent, a non-phosphate, carbonate built granular detergent and an unbuilt liquid detergent. The local water conditions were moderately hard and clay type soils were used. Detergency was evaluated on the basis of both visual and instrumental colour changes. In effecting soil removal, clay stained fabrics laundered with the phosphate detergent retained only a small amount of soil, while fabrics laundered with the two non-phosphate detergents showed heavier staining. In preventing soil redeposition, the phosphate detergent produced almost no visible redeposition; the unbuilt and carbonate built detergents ranked correspondingly lower. In assessing calcium carbonate deposition, the phosphate and unbuilt detergents showed little or no change, while the carbonate detergent continued to build up deposits with laundering. In summary, the phosphate detergent ranked highest in overall performance, with correspondingly lesser performance from the unbuilt and carbonate detergents. 相似文献
17.
18.
《Journal of East-West Business》2013,19(1):57-80
ABSTRACT The article analyzes merger and acquisition activities in Visegrad Countries (the Czech Republic, Poland, Hungary and Slovakia). The analysis established linkages among the FDI, Privatization and M&A activities and reports the characteristics of transactions in the region in a comparative spirit. The findings indicate that majority of activities in the region involved foreign investors from Western Europe and USA. The M&A activities were concentrated in manufacturing segments such as automobiles, food processing, glass and clay, service segments such as telecom, utilities and financial services. The study also revealed some pre and post transaction ownership patterns in respective countries as well as methods of acquisition. 相似文献