共查询到19条相似文献,搜索用时 137 毫秒
1.
以CaCO3、BaSO4、滑石粉为填料,以低密度聚乙烯(LDPE)为基体,通过共混、挤出工艺制得无机填充母粒,将填充母粒与LDPE、线性低密度聚乙烯(LLDPE)按一定比例混合,通过吹塑成型获得不同无机填料改性聚乙烯(PE)薄膜,并对其力学性能和光学性能进行了测试和分析.结果表明,CaCO3、BaSO4、滑石粉质量分数低于15%时,能增加PE薄膜的拉伸强度,而且BaSO4、滑石粉改性PE薄膜的光学性能比CaCO3改性PE薄膜效果好. 相似文献
2.
3.
《玻璃钢/复合材料》2020,(6)
树脂基体中共混纳米无机填料是提高酚醛树脂基复合材料烧蚀性能的一种有效途径,无机填料与酚醛树脂共混改性制备复合材料的工艺简单、成本低、改性效果明显,已成为重要的研究方向。本文对无机填料特别是纳米无机填料改性酚醛树脂基烧蚀材料的烧蚀性能研究进行了梳理,并对多种纳米填料改性复合材料的烧蚀机理研究进行总结归纳。 相似文献
4.
使用填料是塑料改性的有效方法,近年来由于塑料原料价格上升及复合技术的进展,因而增加了对填料与聚乙烯复合物的兴趣。本文概述了填料对聚乙烯性质影响方面的有关文献,并研究了不同的无机填料如:滑石粉、云母、粘土、硅灰石和碳酸钙等对低密度聚乙烯(LDPE)薄膜各性能的影响,对于薄膜的大多数性能来说,填充精细的滑石粉比使用其他填料好。片状的滑石粉能使薄膜的氧气透过性下降80%,并使水蒸汽的穿透速率也降低70%。填充滑石粉、粘土和碳酸钙填料可使薄膜的屈服强度上升,但随着填料用量的增加,不管使用何种填料都使薄膜的断裂拉伸强度下降。特別在填料含量高时(超过30%),断裂伸长率和撕裂强度低下,薄膜呈现脆性。所有填料都能明显降低磨擦系数和改善印刷性能,但对LDPE热熔合性的影响却很小。 相似文献
5.
6.
淀粉——聚乙烯降解体系的分析与设计 总被引:3,自引:0,他引:3
研究了淀粉-聚乙烯降解体系中相容剂、增塑剂对材料力学性能的影响,分析了淀粉的填料特性以及与普通无机填料的区别,讨论了淀粉在加工过程中发生的变化,为得到较高机械性能的淀粉-聚乙烯降解材料提供了途径。 相似文献
7.
8.
9.
10.
11.
12.
Polyethylene and starch–polyethylene composite films were exposed outdoors in the straw-line of a marsh and in sea water on flow-through seatables in the laboratory. The deterioration of these films following exposure was measured by determining changes in tensile properties, weight loss, starch loss, and carbonyl content of the sheet plastic films. Low rates of deterioration were observed for control and starch–polyethylene composite films submerged in sea water. In contrast, both starch–polyethylene composite and control polyethylene films rapidly deteriorated during exposure in the strawline of a marsh. Differences in the observed rate of deterioration of the films placed in the exposure sites is attributed primarily to photodegradation of the films placed in the strawline of a marsh. © 1993 John Wiley & Sons, Inc. 相似文献
13.
14.
聚合物纳米复合材料的制备方法 总被引:17,自引:0,他引:17
从纳米微粒的分散方法以及纳米复合材料的成型技术两方面综述了国内外纳米复合材料的制备方法的发展状况,总结了纳米微粒填充法与紫外光辐射固化技术的结合在制备纳米复合材料方面的几种优点,认为该方法是未来聚合物无机纳米复合材料的主要、新型制备方法。 相似文献
15.
Wei-Ping Dow Chih-Chan Li Yong-Chih Su Shao-Ping Shen Chen-Chia Huang Cliff Lee Bob Hsu Shar Hsu 《Electrochimica acta》2009,54(24):5894-5901
An organic additive, Diazine Black (DB), was employed as a leveler for microvia filling using copper electroplating. DB is a derivative of Janus Green B (JGB), which is a common leveler used for copper fill of submicron or micron circuit metallization in electronic products. This study determined the optimal DB concentration for achieving the best filling performance. The electrochemical behavior of DB and its interaction with other additives, such as a suppressor and an accelerator were characterized using galvanostatic measurements. These electrochemical analyses helped explaining the filling mechanism of the plating formula containing the DB. Various surface morphologies and the crystalline orientation of the plated copper films caused by different DB concentrations were characterized by a scanning electron microscope (SEM) and X-ray diffraction (XRD), respectively. The corresponding chemical activity of the surface atoms of the plated copper films caused by different DB concentrations was characterized using a test of etching rate. 相似文献
16.
17.
Corn starch was modified by propylation and degree of substitution (DS) of four starch modifications were 0.61, 1.56, 2.27, and 2.51. Different films were prepared by blending native and propylated starch with low‐density polyethylene (LDPE). The mechanical properties, thermal properties, water absorption capacity, and biodegradability of the blend films varied with the quantity of starch as well as DS. Tensile strength, elongation, and melt flow index of propylated starch blend films were higher compared to the corresponding native starch blend film. These properties improved with increase in DS from 1.56 to 2.51. Propylated starch blend films were found thermally stable than native starch blend films. There was a decrease in water absorption capacity for the films containing propylated starch at high DS. Enzymatic and soil burial degradation results showed that biodegradability of starch‐LDPE films increased with the increase in the starch concentration but it decreased with increase in the DS. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011. 相似文献
18.
碳酸钙和淀粉对聚乙烯薄膜降解性能影响研究 总被引:1,自引:0,他引:1
目的:研究淀粉和CaCO3对塑料薄膜的降解影响。方法:将CaCO3填充膜和淀粉填充膜经自然曝露、紫外线照射和土埋处理,测试拉伸强度、断裂伸长率和分子量的变化。结果:自然曝露30d,CaCO3填充膜和淀粉填充薄膜的平均拉伸强度分别下降80.8%和54.4%,平均断裂伸长率分别下降99.4%和98.3%,分子量分别下降25.3%和13.8%;紫外光照120h,CaCO3填充薄膜和淀粉填充薄膜的平均拉伸强度分别下降14.7%和45.9%,断裂伸长率分别下降97.3%和97.0%,分子量分别下降66.7%和48.3%;土埋203d,CaCO3填充薄膜和淀粉填充薄膜的失重率分别为2.2%和15.0%。结论:CaCO3和淀粉均能加速聚乙烯塑料薄膜的降解,其中CaCO3的光降解性能方面优于淀粉,而淀粉的生物降解性能优于CaCO3。 相似文献
19.
The adsorption of cationic starch on hardwood fibers and its influence on flocculation were studied in relation to the dosage of cationic starch, the effect of shear forces and the presence of different concentrations of inorganic salts in the paper stock. Flocculation was monitored by means of a focused beam reflectance measurement (FBRM) probe. It was established that floc size at low shear rates depends on adsorption efficiency. At high shear forces, flocs were irreversibly decomposed despite the presence of a higher amount of adsorbed cationic starch on the fibers. Therefore, flocculation was produced by a bridging mechanism. The results show a significant effect of inorganic salts on the adsorption of cationic starch on fibers. Low concentrations of inorganic salts usually improved the adsorption process while higher concentrations (> 0.01 mol/L) reduced the adsorption and limited the flocculation process. 相似文献