热塑性高分子复合材料在航空领域中的运用

热塑性高分子复合材料相较于传统的材料具有更优越的性能且能够再次回收利用。本文从材料介绍以及航空领域应用两方面对热塑性高分子复合材料在航空领域的运用进行探讨,并对未来的应用前景进行展望,从而为航空复合材料制备以及应用提供借鉴。     

热塑性复合材料断裂韧性研究

本文采用ＤＣＢ的ＥＮＦ试验测试了ＰＰＳ／Ｔ３００复合材料的层间断裂韧性，研究了热塑性复合材料的断裂机理，并与热固性复材料作了比较。     

先进的热塑性复合材料—聚苯硫醚复合材料

本文论述了聚苯硫醚复合材料的特性,综述了国内外发展情况,并介绍了它的加工方法。     

高性能热塑性复合材料在航空航天工业中的应用

本文介绍了国外航空航天用高性能热塑性复合材料的现状、发展趋势及其作用。     

国外热塑性复合材料的应用

本文介绍了目前国外热塑性复合材料的应用及在汽车工业中的市场前景，为国内热塑性复合材料的开发应用提供一个参考。     

热塑性弹性体在包覆成型方面的应用

热塑性弹性体是一种兼具橡胶和热塑性塑料特性,在常温显示橡胶高弹性,高温下又能塑化成型的高分子材料。也是继天然橡胶、合成橡胶之后的所谓第三代橡胶。通过包覆成型技术,热塑性弹性体使得制品具有更好的手感和外观,增加了制品功能性和附加值。随着人们对生活质量提出越来越高的要求,热塑性弹性体在包覆成型方面的应用越来越广泛,概述了包覆成型工艺、粘接机理及目前应用情况。     

热塑性复合材料的高温性能

高性能的热塑性复合材料的应用领域是极其广泛的。但是,象许多新材料一样,它们的设计数据资料较欠缺,因此应用设计不能不保守一点,它们的性能潜力也就得不到充分发挥和利用。评价这种材料的高温性能尤其困难,因为几乎没有什么试验数据或使用数据资料可供参考。为此,美国“LNP工程塑料公司”提出了一个试验计划,来确定玻璃     

热塑性复合材料的高温性能

<正> 高性能的热塑性复合材料的应用领域非常广泛,但出于它们是新材料,性能数据一下子还弄不全,因此在应用设计时就不得不保守一点,它们的性能潜力也就得不到充分发挥。美国“LNP工程塑料公司”最近测试了以玻璃纤维或碳纤维增强的耐高温热塑性复合材料的性能。被测试的有PES(聚醚砜)、PEI(聚醚酰亚     

加固用连续纤维增强热塑性树脂基复合材料预制片材的研究综述

本文综述了加固用连续纤维增强热塑性树脂基复合材料(CFRTP)预制片材的特点、原材料的发展情况、国内外现有的制备技术，指出该预制片材因为其具有优良的力学性能、良好的耐腐蚀性、低成本、成型周期短以及可回收等特点，将成为新型的加固材料而用于土木工程的加固修补领域。     

Evaluation of a thermoplastic polyimide (422) for bonding GR/PI composite

A hot-melt processable copolyimide designated 422 previously synthesized and characterized as an adhesive at NASA Langley Research Center for bonding Ti-6A1-4V has been used to bond Celion 6000/LARC-160 composite. Comparisons are made for the two adherend systems. A bonding cycle was determined for the composite bonding and lap shear specimens were prepared which were thermally exposed in a forced-air oven for up to 5000 h at 204°C. Lap shear strengths (LSSs) were determined at room temperature, 177°C, and 204°C. After thermal exposure to 5000 h at 204°C, room temperature and 177°C LSSs decreased significantly; however, a slight increase was noted for the 204°C test. Initially the LSS values were higher for the bonded Ti-6AI-4V than for the bonded composite; however, the LSS decreased dramatically between 5000 and 10 000 h of 204°C thermal exposure. Longer periods of thermal exposure up to 20 000 h resulted in further decreases in LSSs. Although the bonded composite retained useful strengths ( > 11.1 MPa) for exposures up to 5000 h, based on the poor results of the bonded Ti-6A1-4V beyond 5000 h, the 422 adhesive bonded composites would most likely also produce poor strengths beyond 5000 h exposure. Adhesive bonded composite lap shear specimens exposed to boiling water for 72 h exhibited greatly reduced strengths at all test temperatures. The percent retained after water boil for each test temperature was essentially the same for both systems.     

Use of thermoplastic polyurethane elastomers in the preparation of fabric/activated carbon composites

A new application of thermoplastic polyurethane elastomers (TPUs), as composite binder in the preparation of fabric/activated carbon composites, is investigated. Different amounts of TPU in the impregnating solutions, different fabrics, and different activated carbons (ACs) were used to prepare the fabric/carbon composite samples. The adsorption properties of the resulting samples were tested, and the results obtained show the suitability of the composite preparation method proposed in this article. Moreover, the adsorption properties of the composite samples prepared are independent of the fabric used and dependent of the AC properties and the TPU amount used in the preparation. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

用于煤矿井下充填的玻璃纤维增强聚氯乙烯热塑性复合管材的设计与制造

针对煤矿膏体输送所用的无缝钢管耐磨性差、更换困难等问题,制备了玻璃纤维增强聚氯乙烯热塑性复合管(PVC?RTP)用于煤矿井下充填,对管材的组成、连接方式、工艺流程和工艺参数进行了全面介绍,并检测了公称压力为9.5 MPa的管材的性能.结果表明,管材爆破压力为38.95 MPa,大于4倍公称压力;当试验压力为14.25 ...     

吸附制冷用复合吸附剂的吸附性能

固体吸附式制冷因具有环保和节能两大优势,成为国内外竞相开发的热点,尤其是将其用于新型空调系统和太阳能应用产品方面的开发研究备受关注．但从实用化研究成果来看,还远不满足工业化条件,其主要原因之一是受吸附制冷工质对（吸附剂-制冷剂）的性能制约．目前,国内外关于吸附制冷工质对的研究报道比较多,所采用的吸附（工）质仍然以水、甲醇、乙醇和氨为主,对于吸附剂的研究进展比较快,已从当初单一组分吸附剂的选用发展到目前多组分、复合吸附剂的研制．研制性能优良的吸附剂被认为是推动固体吸附式制冷工业化的关键之一．     

吸附制冷用复合吸附剂的吸附等温线推算

用真空重力法测定了水和乙醇在自制复合吸附剂上的吸附等温线。采用由微孔填充理论导出的吸附平衡方程对所测得的等温线进行了拟合,计算相应的吸附热;对用Clausius Clapeyron方程推算吸附等温线的方法进行了讨论,并推算有关吸附等温线。结果表明:水在自制复合吸附剂M1 0001和M1 9906上平衡吸附量的推算值与实测值之间的相对误差<10%;乙醇在自制复合吸附剂上的推算误差<15%。给出了推算等温线和获得等压线的简便方法。     

短纤维／热塑性弹性体复合材料拉伸强度的理论预测与试验研究

对短纤维／热塑性弹性体复合材料的破坏机理进行了理论分析, 提出了短纤维／热塑性弹性体复合材料拉伸强度的理论预测方程, 并对短纤维／ 热塑性聚氨酯复合材料结构与性能的关系进行了试验研究,理论预测结果与试验结果吻合较好。     

对位芳纶树脂粉末及短切纤维增强热塑性树脂研究进展

综述了对位芳纶的树脂粉末、短切纤维和浆粕增强热塑性树脂的研究进展,包括与热塑性树脂的共混方法以及对增强热塑性复合材料的摩擦磨损和力学性能的影响。综述结果表明,对位芳纶树脂粉末增强热塑性树脂后具有优异的耐磨性能,但要求对位芳纶树脂粉末颗粒粒径在150 um以下,这种超细粉末对研磨加工要求较高;对位芳纶短切纤维的长度为1.5mm,并须对其表面进行改性处理,生产这种超短切纤维的短切机需进口且昂贵;对位芳纶浆粕可采取熔融共混后造粒和切断再熔融共混的方法避免团聚的产生。同时指出,国内对位芳纶企业在努力实现稳定规模化生产基础上,应积极进行下游产品的开发。     

CaSO4晶须与EPDM／PP共混型热塑性弹性体复合材料的研究

研究了ＣａＳＯ４晶须与三元乙丙橡胶／聚丙烯共混型热塑性弹性体复合材料的物理机械性能、耐热性能、热老化性能、材料的和各向异性、流变性能,考察了复合材料物理机械性能与晶须用量、界面特性、弹性模量等之间的依赖关系。应用ＳＥＭ观察和ＤＳＣ热分析以及ＴＧ热重分析研究复合材料结构－性能间关系中存在的一些制约机理。     

Whey protein aggregates-alginate composite gel for astaxanthin-chia oil encapsulation

Chia oil (rich in omega-3 fatty acids) and astaxanthin are associated with various benefits for human health. However, their low solubility and poor stability reduce their direct use as bioactive compounds. Its encapsulation within the appropriate material can be a solution in this case. This work evaluated the effect of whey protein aggregates (WPA) on the storage stability of chia oil-astaxanthin blends encapsulated in alginate gel beads. Bead characteristics and the stability of encapsulated bioactive compounds stored at 25°C for 30 days were evaluated. High values of encapsulation efficiency (>85%) were observed in the cases studied. The addition of WPA affected some characteristics of the beads and improved the stability of the bioactive compounds compared to pure alginate beads. After 30 days of storage, higher preservation of astaxanthin and lower content of lipid oxidation products were observed in beads with WPA compared to alginate beads.