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聚丙烯(PP)作为一种使用广泛的热塑性塑料,对其增韧改性一直是研究的重点,共混改性作为最常用的改性方法之一,受到科研工作者的关注。该文主要从与塑料共混增韧、与橡胶或弹性体共混增韧、与无机纳米粒子共混增韧、与有机/无机纳米材料共混增韧以及与其他材料(如:玻璃纤维、碳纤维、石墨烯、竹粉)共混增韧5个方面综述了近3年PP共混增韧改性的一些研究工作。 相似文献
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探讨了国内外尼龙材料增韧研究的现状,目前尼龙材料增韧主要集中于以下几个方面:用尼龙与弹性体共混制备超韧尼龙,包括聚烯烃类弹性体增韧尼龙,苯乙烯类嵌段共聚物增韧尼龙,核-壳型冲击改性剂增韧尼龙,以及离聚物为增容剂增韧尼龙;无机刚性粒子增韧尼龙,能在提高材料的抗冲击性能的同时,保证不降低其拉伸强度和刚性;有机刚性粒子增韧尼龙。 相似文献
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简要介绍了聚乳酸(PLA)增塑改性的增塑机理,综述了近年来PLA增塑及增韧改性研究现状及进展,主要包括聚乙二醇、柠檬酸酯、植物油增塑改性PLA及柔性可降解树脂、弹性体、无机刚性粒子、植物纤维、淀粉等韧性材料共混增韧改性PLA,得出了PLA在增塑及增韧过程中存在的一些问题,如添加增塑剂改性或与柔性可降解树脂共混难以保证力学强度、弹性体共混降解性不佳、无机刚性粒子增韧效果不明显等,并针对PLA增塑及增韧所面临的问题及解决方法进行了展望。 相似文献
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聚丙烯共混增韧研究进展 总被引:4,自引:1,他引:4
从塑料增韧聚丙烯(PP)体系,橡胶或热塑性弹性体增韧PP体系、PP/弹性体/塑料三元共混体系以及无机刚性粒子增韧PP体系4个方面详细论述了国内外PP共混增韧改性的研究进展。采用塑料类作为改性剂增专心PP,虽可增韧,但是由于体系的不相容性,往往要大量使用改性剂或添加相容剂。使用橡胶或者热塑性弹性体与PP共混增韧效果最为明显,但由于随着弹性体用量的增加,体系在冲击强度大幅度提高的同时也出现了刚性等性能的损失。PP弹性体/塑料三元共混体系可均衡改善力学性能及降低成本。此外,还就近年发展起来的无机刚性粒子增韧PP的研究工作进展和机理研究情况作了介绍。 相似文献
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主要介绍了聚乳酸的化学增韧改性(共聚改性)和物理增韧改性(增塑、共混与无机刚性粒子复合),综述了近年来国内外聚乳酸增韧改性的研究现状及进展,并对今后聚乳酸增韧改性提出了建议。 相似文献
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聚丙烯增韧改性中结晶形态的变化 总被引:6,自引:1,他引:5
综述了聚丙烯(P)增韧改性与结晶形态变化的关系,不同的共混组分对PP结晶行为的影响不同,分别有细化分割、共结晶、原位成纤复合等作用。无机刚性粒子及有机/无机纳米粒子主要起到异相成核作用,诱发对增韧有贡献的β-晶的形成。讨论了不同β晶成核剂对PP结晶的影响。 相似文献
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有机/无机纳米复合材料的制备 总被引:2,自引:0,他引:2
有机/无机纳米复合材料是由有机高聚物和无机纳米材料复合而成的,综述了有机/无机纳米复合材料的制备技术,并介绍了各种方法的优点和缺点,最后展望了有机/无机纳米复合材料的发展前景。 相似文献
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溶胶-凝胶技术在有机/无机杂化材料制备中的应用 总被引:2,自引:0,他引:2
应用溶胶-凝胶法制备有机/无机杂化材料,可根据前驱体的种类和制备方法等对材料微观结构进行裁剪和优化,并可实现材料的功能化。有机/无机杂化材料根据有机相和无机相的比例不同,可分为有机改性陶瓷型杂化材料和陶瓷改性有机物型杂化材料两类。本文综述了应用溶胶-凝胶技术制备有机/无机杂化材料的原理以及应用进展。 相似文献
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Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many
coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ
within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting
organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled.
An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent
is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible.
UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive
substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using
UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control
over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant
UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely
block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology
of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent.
Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago,
IL. 相似文献
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Charles Reeb Christel Pierlot Catherine Davy David Lambertin 《Ceramics International》2021,47(6):7369-7385
Geopolymers, composed of an amorphous three-dimensional inorganic network and synthesized by the activation of a solid alumino-silicate precursor with an alkaline activating solution, have attracted increasing attention because of their environmental benefits and favorable characteristics. This review deals with the development of organic/inorganic composite materials made by adding organic liquids into inorganic geopolymer matrices. Firstly, the incorporation processing approaches are presented and are divided into three categories: (i) Direct incorporation, (ii) Pre-emulsification (iii) Solid impregnation. Their main advantages and drawbacks are discussed in relation to the aimed properties. Secondly, this review highlights that geopolymers are low-cost candidates allowing technologically significant applications, through the incorporation of various organic liquids. Aside from the well-studied immobilization of industrial waste streams commonly known as stabilization/solidification (S/S), the development of highly porous geopolymer foams and the design of reinforced organic/inorganic composite matrices are being notably investigated. This review aims at summarizing the main published results, and fostering further investigations into innovative uses of organic liquids incorporated into geopolymers for a wide range of applications. 相似文献