专业英语 英译汉

For many years, glass and carbon fiber have been the accepted traditionalreinforcements to polymers. But now many people have recognized that glass fiber is difficult to be disposed(处理）and carbon fiber is too expensive. Natural fibersare a realistic alternative reinforcement because of the advantages of their low cost, relatively high toughness, good thermal properties and excellent environmental performance, and their reinforced polymer composites have attracted a lot of attention in automobile industry as environmental friendly and recycleable materials. This work has successfully fabricated ramie fiber reinforced polypropylene composites (RF/PP) with injection moulding method, which is more economic than press moulding method. RF/PP isfabricated by blending treated RF with PP using a twin-screw extruder and then makingthem as blended pellets. The blended pellets were subsequently injection molded to obtainthe ramie fiber reinforced ploymer composites.

很多年以来，玻璃纤维和碳纤维对高分子来说已经成为公认的传统增强剂。但是现在很多人意识到玻璃纤维很难被处理，并且，碳纤维很昂贵。传统纤维是理想的增强剂，因为它们价格低廉，韧性十分强，很好的热性能和优异的环境表现性能的优点，而且，它们的加强聚合物复合材料在汽车工业作为环境友好和可回收材料吸引了很大的注意力。这个工作已经成功地制造出用注射成型方法苎麻纤维加强的聚丙烯复合材料（RF/PP），注射成型方法比模压成型方法更经济。RF/PP是将处理过的RF和PP用双螺旋挤出机混合，然后将他们制成混合粒料制造的。混合粒料随后被注射成型就获得了苎麻纤维加强聚合物复合材料。

The effects of fiber length, fiber content and fiber treatment method on the mechanical properties of the fabricated RF/PP composites being applied as automobile interior were investigated using an Instron computer-controlled testing machine at room temperature. The morphologies of the RF/PP composites were investigated by a scanning electron microscope (JSM-5610). It is found that the increases of fiber length and fiber addition can improve the tensile strength, flexural strength and compression strength apparently with slight decrease of the impact strength. The treatment of ramie fiber can not only clean the fiber surface, but also modify its microstructure. This is good to get better mechanical properties of RF/PP composites.

纤维长度，纤维含量和纤维处理方式对应用于汽车内部的制造的RF/PP复合材料的力学性能的影响用Instron电脑控制测试机器在室温下研究。RF/PP复合材料的形态用扫描式电子显微镜(JSM-5610)研究。我们发现纤维长度增加和增加纤维可以提高拉伸强度，扭转强度和抗压强度，同时伴有冲击强度的少许下降。苎麻纤维的处理不但可以清理纤维表面，而且可以改善它的微观结构。这对于得到更好力学性能的RF/PP复合材料是非常好的。

Polymer/inorganic particle nanocomposites have attracted considerable attention owing to theirexcellent processability, mechanical, optical, electric, magnetic, bioactive and gas sensitive properties. Among the numerous nanocomposites, silica nanoparticles are the most commonly reported, and have been employed in a variety of applications due to their optical transparency, electrical insulation, biocompatibility, chemical and thermal resistance, mechanical stability and variable sizes, tunable surface properties and low costs [1, 2]. The greatest challenge to their large-scale production and commercialization is how to control the homogeneous dispersion of nano-silica in polymer matrix [3]. Here, the colloidal silica nanoparticles were synthesized by

sol-gel process, then a series ofcomposite particles with colloidal silica as the core and the polymer as the shell were synthesized by in-situ polymerization of vinyl monomer, whose formed polymer is miscible or compatible with the following compounding polymer matrix, such as isotatic polypropylene and acrylic resin. Compared to the colloidal silica particles, the composite particles