摘要

摘要：（复制摘要部分）介绍了热致性液晶聚芳酯纤维的制备。选用双酚A、对苯二甲酸、间苯二甲酸为单体进行熔融聚合,制得具有不同相对分子质量的双酚A-对/间苯二甲酸共聚酯,探索了后续固相聚合工艺,研究了后续固相聚合对原熔融聚合物相对分子质量、热性能以及力学性能的影响。原聚合物再经固相聚合及不经固相聚合的两种聚芳酯在不同的纺丝和热处理工艺条件下,可以获得力学性能相近的聚芳酯纤维,为进一步研制热致液晶型聚芳酯纤维生产路线提供可靠的工艺数据。

摘要：本文通过对水泥混凝土桥面铺装病害情况的调查,提出桥面防水粘结层的重要作用。借鉴国内外对桥面防水粘结层的研究现状,结合我国使用的桥面防水材料的特点,对目前常用的桥面防水粘结层存在的问题作出了分析,从而提出新型的桥面防水粘结层——同步碎石,并对其进行深入研究。本文首先提出异步碎石的工作原理,同时引出同步碎石的工作原理——沥青结合料和骨料“同步”撒布,在一秒钟内完成结合。通过对这样的工作原理的分析,提出同步碎石作为桥面防水粘结层的可能性和一系列优点。并且对同步碎石桥面防水粘结层组成材料——沥青结合料和石料进行分析研究,提出这两种材料的主要技术指标,以及这两种材料的组成设计。接着,通过直接剪切、拉伸试验为防水粘结层结构研究的试验方法,对同步碎石桥面防水粘结层的抗剪强度、抗拉强度进行研究,得出异步碎石与同步碎石防水粘结层之间的差别,并与常用的桥面防水粘结层进行对比,得出同步碎石优越的层间稳定性,并提出一定条件下的最佳沥青洒布量和石料撒布量。然后,通过不透水性能试验,将同步碎石与常用防水材料进行对比,得出其良好的不透水性能。最后,提出施工方面的一些技术要求,可以作为施工过程的参考。本文较系统的研究了同步碎石桥面防水粘结层,对其在全国的推广具有一定的参考作用。

摘要：（复制摘要部分）一项道路防水增强技术。该技术用于道路损坏维修。该技术是在沥青道路凹陷裂纹、水泥道路断裂、唧泥修补中，采用防水粘结胶液与特种混凝土(特种混凝土：特种乳化沥青BCR胶

液与骨料搅拌均匀，之后加入聚乙烯醇胶液搅拌均匀，最后加入水泥和水充分搅拌使之均匀)结合修补道路。该技术能够使道路新旧材料更易亲和且达C35-C40强度。

摘要：（复制摘要部分）本标准规定了改性沥青类防水卷材成套生产设备 通用技术要求的术语和定义、-般要求、性能要求、试验条件、性能测试，验收规则以及标志、包装、运输和贮存等。本标准适用于生产带有胎基的改性沥青防水卷材的各种生产设备

Abstract：The composite materials are replacing the traditional materials, because of its superior properties such as high tensile strength, low thermal expansion, high strength to weight ratio. The developments of new materials are on the anvil and are growing day by day. Natural fiber composites such as sisal and jute polymer composites became more attractive due to their high specific strength, lightweight and biodegradability. Mixing of natural fiber with Glass-Fiber Reinforced Polymers (GFRPs) are finding increased applications. In this study, sisal-jute-glass fiber reinforced polyester composites is developed and their mechanical properties such as tensile strength, flexural strength and impact strength are evaluated. The interfacial properties, internal cracks and internal structure of the fractured surfaces are evaluated by using Scanning Electron Microscope (SEM). The results indicated that the incorporation of sisal-jute fiber with GFRP can improve the properties and used as a alternate material for glass fiber reinforced polymer composites. (c) 2012 Elsevier Ltd. All rights reserved

Abstract：（复制摘要部分）This study analyzes the principle of dispersal dyeing on jade polyester fiber knitted fabric, and confirms the suitable dyeing technology on jade polyester fiber knitted fabric. By testing the color fastness to washing, color fastness to rubbing and color fastness to perspiration, the results show good. So it indicates that this dyeing process is very suit for the jade polyester fiber knitted fabric. © (2011) Trans Tech Publications, Switzerland.

Abstract：（复制摘要部分）In 2009, of the 44.1 million tons of chemical fibres manufactured in the world, 72% were polyester (PES) fibres. The increase over 2008 was the highest, including complex fibres by

8.7%, to 19.7 million tons, and staple fibre by 7.8%, to 12.8 million tons. China's share was 60% of world production of PES fibres. By 2020, world production of PES staple fibre should reach 24 million tons, while PES complex fibres are estimated to reach 45.5 million tons, with unprecedented average annual growth rates of 8.5 and 11.2%, respectively. Priority remains with China, as previously, where the production volume was greater than 60 million tons for the same time period. In other regions, for example, in Japan, the USA, South Korea, and Western Europe, either stagnation or a drop in production will be observed in the future. In the CIS and Russia, the situation with PES fibres was negative on the whole in 2009. Production of all types of this product dropped sharply at Mogilevkhimvolokno Co. Only one enterprise - Svetlogorsk Khimvolokno IA in Belarus, which exceeded the projected capacities by 6000 tons/year, will survive in the future. In Russia, attention will be focused on development of poly(ethylene terephthalate) (PET) for packaging (primarily bottles) as previously, but processing it into PES fibres will almost be ignored, which will leave the domestic textile industry outside of the mainstream of current trends.[ABSTRACT FROM AUTHOR]

Copyright of Fibre Chemistry is the property of Springer Science & Business Media B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.Copyright applies to all Abstracts

Abstract：（复制摘要部分）Unsaturated polyester resin, which is commonly used as the matrix in synthetic glass fibre composites, has been modified to make it more compatible with cellulose fibres. Long kenaf fibres were alkalized with a 6% NaOH solution, combined with four different polyester resin formulations, A, B, C and D, and hot-pressed to form natural fibre composites. Polyester resin A was a conventional unsaturated polyester resin in styrene monomer, Crystic 2-406PA. The molecular structure of polyester B was based on polyester A, modified to make it more polar in nature to better react with the surface of

natural fibres, and this modification resulted in the best mechanical properties. The flexural modulus and flexural strength of polyester B composites gave the highest values and the unmodified polyester resin (polyester A) gave the lowest. The opposite trend was obtained for the impact test as expected. Dynamic mechanical analysis (DMA) showed that polyester B composites gave the highest storage modulus (E′) values and the lowest tan δ values. Scanning electron microscope (SEM) micrographs of impact fracture surfaces performed on the polyester B composites clearly demonstrated better interfacial adhesion between fibre and matrix. A moisture absorption test also showed that polyester B composites gave the most superior bonding and adhesion of all the other polyester–kenaf composites

809篇化原