尼龙增韧材料的研究现状

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。     

国内外尼龙增韧研究进展

介绍了近年来尼龙增韧的最新研究进展，并对尼龙增韧的发展前景进行了展望，把尼龙增韧的研究划分为6类，即不同尼龙品种之间的共混、尼龙／聚烯烃、尼龙／聚烯烃弹性体、尼龙／高性能工程塑料、尼龙／无机物、尼龙／有机低分子物，列举了主要的研究工作。     

尼龙增韧改性的研究进展

综述了国内外尼龙增韧改性的研究进展,介绍了尼龙增韧机理的研究进展,并从不同方面对尼龙的增韧进行了探讨,例如"壳-核"共聚物增韧尼龙、聚烯烃弹性体增韧尼龙、有机刚性粒子增韧尼龙以及无机非弹性体增韧尼龙。     

尼龙的增韧耐磨共混改性

着重介绍了尼龙(PA)与无机填料、聚烯烃、烯烃共聚物及弹性体、工程塑料以及各种尼龙之间的增韧耐磨共混改性。提出了提高韧性和耐磨性能的新途径。     

增韧增强改性尼龙的研究及应用

综述聚烯烃弹性体、橡胶、苯乙烯系共聚物等增韧尼龙和玻璃纤维、碳纤维和芳纶纤维等增强尼龙及增韧增强相结合改性尼龙的研究进展。介绍了增韧增强尼龙的应用情况。     

弹性体共混改性聚丙烯及其应用

本文论述了弹性体共混改性聚丙烯的基本理论，共混增韧体微观结构与性能的关系，介绍了几种典型的增韧体系及其应用，指出弹性体共混增韧ＰＰ在汽车、家电包装行业具有广阔的应用前景。     

PVC共混增韧改性研究进展

阐述了近年来国内外聚氯乙烯(PVC)共混增韧改性的研究进展;介绍了PVC化学改性和物理改性;探讨了PVC弹性体共混增韧改性和刚性粒子共混增韧改性,尤其是纳米粒子共混增韧改性,指出了PVC共混增韧改性的研究前景及发展方向。     

橡胶与弹性体增韧改性聚丙烯的研究进展

从橡胶、弹性体对聚丙烯(PP)进行增韧的机理出发,介绍了当前国内外研究较多的PP/橡胶与PP/弹性体二元共混物及其三元共混物。综述了采用具有不同结构的橡胶与弹性体、相容剂增容共混物以及无机材料协同弹性体对PP进行增韧改性的研究进展,同时也从共混加工工艺上对橡胶与弹性体增韧PP进行了阐述,分析了复合材料的综合性能,并对今后国内外增韧改性PP提出了展望。     

聚丙烯共混增韧研究进展

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。     

橡胶/聚丙烯树脂共混增韧研究进展

简述了橡胶弹性体/聚丙烯共混体系的增韧机理,着重就增韧的影响因素综述了国内橡胶弹性体/聚丙烯共混增韧改性的最新进展.     

乙烯-丙烯-己烯共聚物熔融接枝马来酸酐及其应用

在双螺杆挤出机上进行了乙烯-丙烯-己烯共聚物(KN)与马来酸酐(MAH)熔融接枝反应,在共聚物的分子链上引入了极性基团。采用红外光谱(FT-IR)和核磁共振谱(NMR)表征了接枝物的结构,当MAH质量分数为1.8%、引发剂DCP的质量分数为0.12%时,可获得性能优良的接枝物。经接枝改性的KN与尼龙6(PA6)的相容性明显改善,可以制备超韧尼龙,当KN的质量分数为20%时,PA6/KN体系的缺口冲击强度可达95kJ/m2,是纯PA6的16倍。     

HDPE、改性HDPE与PA6,6共混物的机械性能和结构形态

研究了HDPE、改性HDPE与PA6,6的共混比、制备方法及增容剂对共混物性能的影响。结果表明,改性HDPE与PA6,6共混,能够得到很好的相容性(特别是在共混比是50/50时),并在很多方面(拉伸强度、屈挠强度、伸长率)得到良好的性能;两步法得到的共混物中,HDPE与PA6,6获得良好的相容;一步法得到的共混物可得到较高的屈挠强度。     

聚酰胺改性技术进展

综述了国外聚酰胺牌号的发展、改性技术方法及其进展,包括填充、增强、共混等手段提高聚酰胺的综合性能和某项专用性能,介绍改性聚酰胺常用的填充剂、增强剂及其改性技术的最新动态     

PP-g-MAH和PP-g-GMA增容PP/PA6共混体系的研究

将自制的PP—g—MAH（聚丙烯接枝马来酸酐）及PP—g—GMA（聚丙烯接枝甲基丙烯酸缩水甘油酯）作为PP／PA6共混体系的相容剂，研究了加入聚丙烯接枝物后PP，PA6塑料合金的各种力学性能及形态结构。结果表明：在PP／PA6共混物中加入PP—g—MAH后，共混物的力学性能得到明显的提高．添加PP—g—MAH对不同比例PP／PA6共混物力学性能的影响不同；用PP—g—MAH和PP—g—GMA两种接枝物共同作为相容剂加入到PP／PA6共混物中比单独使用一种的效果要好。共混物的SEM照片表明。PP—g—MAH是PP／PA6共混物的有效增容剂。     

反应型增容剂PS-co-GMA在PA1010/ABS共混体系中的增容作用

以ＰＳ－ｃｏ－ＧＡＭ作为ＰＡ１０１０／ＡＢＳ共混体系的增容剂,探讨了增容剂的含量对共混体系力学性能的影响,同时,利用熔融共混法制备了ＰＡ１０１０／ＡＢＳ－ｇ－ＧＭＡ共混体系,比较了两种增容方式对共混体系力学性能的影响。     

A study on functionalizing SEBS through ozone treatment and the mechanical properties of its blend with polyamide 6

Two types of styrene‐b‐(ethylene‐co‐1‐butene)‐b‐styrene triblock copolymer (SEBS) were functionalized through ozone treatment. The structure and properties of ozonized SEBS and the mechanical properties of their blend with Polyamide 6 (PA6) were studied by FTIR spectroscopy, gel permeation chromatography, gel content measurement, contact angle measurement, SEM, and mechanical properties measurement. The experimental results show that through ozone treatment, some oxygen‐containing groups (mainly carbonyl groups) are introduced onto the molecular chains of SEBS. The polarity of SEBS is thus improved. Compared with star‐shaped SEBS602, SEBS503 of linear shape is more susceptible to ozone oxidation. The polarity of ozonized SEBS503 is higher than that of ozonized SEBS602. The improvement of mechanical properties of PA6/ozonized SEBS blend is attributed to the improvement of the dispersion of ozonized SEBS in PA6 matrix and the interfacial adhesion between PA6 and ozonized SEBS. Compared with that of PA6/ozonized SEBS602 blend, the size of dispersed phase in PA6/ozonized SEBS503 blend is smaller, and the interfacial adhesion is stronger. The notched Izod impact strength of PA6/ozonized SEBS503 (90 min) (90/10) blend is 49.6 kJ/m², is higher than that of PA6/ozonized SEBS602 (90 min) (90/10) blend, which is only 21.3 kJ/m². The impact strength of PA6/ozonized SEBS503 (90 min) (80/20) blend is 68.7 kJ/m², is still higher than that of PA6/ozonized SEBS602 (90 min) (80/20) blend, which is 60.2 kJ/m². © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

PP/EVOH/PA6共混物的性能研究

以聚丙烯接枝马来酸酐(PP-g-MAH)为相容剂,制备了聚丙烯(PP)/乙烯-乙烯醇共聚物(EVOH/)聚酰胺6(PA6)共混物,研究了PP/EVOH/PA6三元共混物的相容性、流变性能、阻隔性能、力学性能、热性能及形态结构。结果表明:相容剂与EVOH和PA6间发生了反应,提高了共混物的相容性;相容剂的加入提高了PP、EVOH、PA6的结晶温度,增强了PP与EVOH和PA6间的黏合力,降低了界面张力;EVOH占EVOH/PA6总量68%的三元共混物吸油率最小,当相容剂用量为5份时,PP/EVOH/PA6三元共混物吸油率比PP/EVOH二元共混物降低了8%。     

Structure-property relationships of microfibrillar reinforced blends of linear polycondensates

Binary microfibrillar reinforced composites are obtained by melt-blending of poly(ethylene terephthalate) (PET) and polyamide 6 (PA6), as well as polyamide 66 (PA66) and PA6 (both 40/60 by wt) in the presence of a catalyst, followed by cold drawing of the bristle to about 3.5 times and annealing at 220 or 240C. The blends are studied by X-ray diffraction, scanning electron microscopy (SEM), light microscopy and static mechanical testing. SEM and light microscopy reveal different blend morphologies due to differences in the miscibility of the homopolymers: the PA66/PA6 blend is morphologically more homogeneous, than the PET/PA6 blend. Annealing at 240C results in preservation of the high orientation of PET and PA66 while the PA6 portions of the two blends are partially disoriented, much more for the PET/PA6 blend as concluded from the X-ray data. Annealing at 240C suggest also transreactions leading to the in situ generation of block copolymers in addition to the generated ones during blend mixing in the extruder which improve the compatibility of the blend components. These physical and chemical changes affect the mechanical properties of the fibrillar reinforced blends and composites. The Young's moduli (E) and tensile strength ( σ t ) of the drawn blends are 5-6 and 7-9 times higher than those of the asextruded samples. Heat treatment at 220C results in a slight (for PA66/PA6) and stronger (for PET'PA6 blend) decrease of the σ t while E remains unchanged. A stronger decrease of E in both blends and of σ t in PA66/PA6 sample has been observed after annealing at 240C. Nevertheless, E and σ t of the last samples are about 3 times higher than those for the neat PA6.     

差别化聚酰胺6纤维的研究进展

介绍了原位聚合、物理共混、复合纺丝和后处理等技术制备差别化聚酰胺6(PA6)纤维的方法,探讨了特黑超细PA6纤维、阻燃PA6纤维和导电PA6纤维的国内外研究进展。     

冷桥用PA66挤出异型条专用料研究

介绍采用双螺杆挤出机生产冷桥用PA66挤出异型条专用料的配方及工艺。该专用料以PA66为主体原料，经玻纤，改性剂，滑石粉共混改性制成。分析了几种改性材料对冷桥用PA66挤出异型条专用料性能的影响，并探讨了PA66自身性能对专用料性能的影响。该专用料经有关厂家使用，其性能达到使用要求。