PTFE改性玻纤增强MPPO材料力学性能及耐摩擦磨损性能的研究

采用直径为3.0μm的短玻纤(GF)(GF质量分数为20％)增强改性聚苯醚(MPPO),将其与粒径为5～7 μm的聚四氟乙烯(PTFE)微粉和甲基苯基硅油构成摩擦因数较低的耐磨体系.通过熔融共混法制备PTFE改性GF增强MPPO材料(简称MPPO/20％GF复合材料).对MPPO/20％GF复合材料的力学性能、热变形温...     

道恩成功开发出MPPO及增强MPPO

山东道恩集团所属工程塑料研究中心不久前研制出HIPS改性的MPPO（聚苯醚与苯乙烯聚合物合成的塑料合金）及增强MPPO，性能达到或超过同类进口产品，解决了熔体流动性差、加工成型困难等技术难题。其20％玻纤增强MPPO目前已送客户试用，下一步将进行PPO／PA、PPO／ABS等的开发。     

聚苯醚合成与改性应用前景广阔

聚苯醚(PPO)和改性聚苯醚(MPPO)是一种耐高温的热塑性工程塑料，由于PPO树脂本身熔体流动性差，不易热塑加工，若采用高抗冲击聚苯乙烯等共混改性，而制成改性聚苯醚，不但能保持PPO树脂优良的综合性能，同时能有效改善PPO树脂的加工性能，且成本大幅度降低。目前聚苯醚及改性聚苯醚成为世界上开发最成功的高分子合金之一，以其优良的性能和众多品种，发展成为当今世界五大工程塑料之一。     

聚苯醚、聚丙烯酸酯改性酚醛树脂及老化研究

对分别采用聚苯醚(PPO)、聚丙烯酸酯(PAK)改性的环保型酚醛树脂(PF)的热分解过程进行了差热分析,并探讨了玻璃纤维(GF)增强这两种改性PF在300℃/200h热老化过程中的力学性能与电性能的变化情况。结果表明,在300℃老化200h后,PF/PAK/GF的力学性能优于PF/PPO/GF和PF/GF;而PF/PPO/GF的电性能优于PF/PAK/GF和PF/GF。     

国内外聚苯醚生产技术及市场分析

详细介绍了国内外聚苯醚(PPO)几种主要的生产技术,对比分析各生产工艺的差异,指出其发展趋势。还分析了目前世界上主要厂商PPO/MPPO的生产能力及消费状况,最后介绍了中国PPO改性产品的最新进展。     

PPO/PPS/GF复合材料的制备及性能研究

采用相容剂氢化丁苯胶接枝马来酸酐(SEBS-g-MAH)制备了聚苯醚/聚苯硫醚/玻璃纤维(PPO/PPS/GF)复合材料,分析了相容剂、GF以及高抗冲聚苯乙烯(HIPS)对复合材料性能的影响.结果表明:SEBS-g-MAH用量越大,复合材料冲击强度越高,其质量分数为3％时,复合材料(含有质量分数30％GF)拉伸强度达到...     

北京首塑新材料国产聚苯醚合成树脂开发成功

北京首塑新材料科技有限公司与中国蓝星化工集团星新材料股份有限公司芮城分公司签署合作协议，双方将联手推进国产聚苯醚（PPO）合成树脂及改性PPO工程塑料产业化。星新材料公司已在其年产万吨级PPO单体合成及PPO合成树脂产业化装置上成功生产出质量稳定的PPO树脂，首塑新材料公司则用PPO树脂开发成功用于电子信息、汽车等领域的改性聚苯醚（MPPO）系列新材料。     

北京首塑新材料聚苯醚开发成功

北京首塑新材料科技有限公司与中国蓝星化工集团星新材料股份有限公司芮城分公司签署合作协议，双方将联手推进国产聚苯醚（PPO）合成树脂及改性PPO工程塑料产业化。据悉，星新材料公司已在其年产万吨级PPO单体合成及PPO合成树脂产业化装置上，成功生产出质量稳定的PPO树脂，首塑新材料公司则用PPO树脂开发成功用于电子信息、汽车等领域的改性聚苯醚（MPPO）系列新材料。     

GF表面的多步接枝改性及其对PP/GF复合材料拉伸性能的影响

为提高热塑性树脂聚丙烯(PP)与玻璃纤维(GF)之间的界面相容性和粘结强度,提出了一种对GF三步浸渍的方法,将GF逐步用(3-氨丙基)三乙氧基硅烷(γ–APS),1,6-己二异氰酸酯(HDI)及苄胺或十八胺处理,从而在GF表面接枝上长的分子链。利用接触角测定仪、衰减全反射傅立叶变换红外光谱(ATR–FTIR)仪和X射线光电子能谱(XPS)仪等手段,对改性后的GF表面进行了表征,证明了接枝反应的成功进行。将不同方法改性的GF与PP制备成单向PP/GF复合材料,对其进行了拉伸性能测试。结果表明,随着GF表面接枝的碳链增长,复合材料的拉伸强度逐渐增大。     

PPO-g-MAH对PPO/PA66合金和PPO/PA66/GF体系性能的影响

研究了马来酸酐接枝聚苯醚(PPO-g-MAH)作为相容剂对聚苯醚/尼龙66(PPO/PA66)合金及30%玻璃纤维增强PPO/PA66合金(PPO/PA66/GF)体系性能的影响。通过傅里叶红外光谱(FTIR)、扫描电子显微镜(SEM)、差示扫描量热仪(DSC)及常规力学性能测试对PPO-g-MAH和PPO-g-MAH添加量对合金体系的微观形貌、熔融结晶行为及常规物性进行研究。结果表明:PPO-g-MAH的加入能够明显降低PPO/PA66合金中PPO分散相尺寸且玻璃化转变温度逐步向低温方向偏移,而PA66相的熔融焓和结晶焓也明显降低,都表明两相相容性的显著改善;PPO-g-MAH不仅能改善PPO/PA66合金的相容性,还能够进一步改善PPO/PA66/GF体系中玻璃纤维与基体树脂间的界面性能;宏观表现为PPO/PA66合金和PPO/PA66/GF体系物理力学性能的大幅度提升。     

Preparation of high performance adhesives matrix based on epoxy resin modified by bis-hydroxy terminated polyphenylene oxide

A bis-hydroxy terminated polyphenylene oxide (MPPO) modification was tried for the purpose of simultaneously enhancing the processability and heat resistance of epoxy resin. The thermal stability, chemorheology, morphology and mechanical properties of epoxy-polyphenylene oxide blends were investigated, respectively. The structure of MPPO was characterized by nuclear magnetic resonance and fourier transform infrared spectroscopy which indicated that MPPO was successfully synthesized. Epoxy-polyphenylene oxide blends exhibited a wide range of processing temperature mainly owing to the existence of bis-hydroxy in MPPO. Mechanical properties results revealed that the impact strength, tensile strength and elongation at break of MPPO/EP systems were performed satisfactorily. Scanning electron microscopy studies revealed the two-phase morphology and modification mechanism of the epoxy-polyphenylene oxide. Dynamic mechanical analysis and thermal gravimetric analyzer results showed that the introduction of MPPO leading to an enhancement to the thermal stability of epoxy matrix. Therefore, epoxy-polyphenylene oxide blends meet the requirements for the prepreg and high performance adhesives matrix.     

Flame retardancy and toughening of high impact polystyrene

Flame retardant high impact polystyrene (HIPS) was prepared by melt blending HIPS, nano‐modified aluminum trihydrate (nano‐CG‐ATH), red phosphorus masterbatch (RPM), and modified polyphenylene oxide (MPPO). Styrene‐butadiene‐styrene (SBS) was used as a toughener in this research. The effects of nano‐CG‐ATH, RPM, MPPO, and SBS on properties of HIPS composites were studied by combustion test, mechanical tests, and thermogravimetric analysis. The morphologies of fracture surfaces and char layers were characterized through scanning electron microscopy (SEM). The HIPS/nano‐CG‐ATH/RPM/MPPO (60/6/9/25) composite and its combustion residues at various temperatures were characterized by Fourier transform infrared (FTIR) spectra analysis. The results showed that the UL‐94 rating of the HIPS/nano‐CG‐ATH/RPM/MPPO (60/6/9/25) composite reached V‐0 and its char layer after flame test was integrated, but its impact strength was low. Addition of SBS improved its impact property and did not influence its thermal and flame retardant properties but lowered its tensile strength and flexural modulus to some extent. The FTIR spectra confirmed that the P O C group was present in the charred substance. POLYM. COMPOS., 28:551–559, 2007. © 2007 Society of Plastics Engineers     

无卤阻燃高抗冲聚苯乙烯的研制

研究了纳米改性氢氧化铝（CG-ATH）、改性聚苯醚（MPPO）和红磷母料对高抗冲聚苯乙烯（HIPS）的阻燃作用及SBS对所得阻燃材料的增韧作用，得到了具有良好阻燃性能和物理机械性能的复合材料。结果表明，CG-ATH和MPPO与红磷母料之间有很好的协效阻燃作用，配合使用可以使HIPS的垂直燃烧达到FV-0级，氧指数达到27．5％，但是所得复合材料的冲击强度较低。SBS对复合材料有很好的增韧作用，可以使冲击强度提高一倍以上，并且不影响复合材料的阻燃性能。     

玻纤增强聚丙烯复合材料性能研究

研究了玻纤(GF)、SEBS和聚丙烯接枝马来酸酐(PP-g-MAH)用量对GF增强聚丙烯复合材料性能的影响,以及PP/GF(65/35)、PP-g-MAH/PP/GF(15/65/35)的微观形态。结果表明:随着GF用量的增加,复合材料的拉伸强度、弯曲强度和弯曲模量增加,断裂伸长率降低,冲击强度先减小后增大,PP/GF复合材料断面呈脆性断裂;在PP/GF中添加增韧剂SEBS可以提高复合材料的冲击强度,但拉伸强度、断裂伸长率、弯曲强度和弯曲模量均减小;在PP/GF中添加增容剂PP-g-MAH,可使其拉伸强度、断裂伸长率、弯曲强度、弯曲模量和冲击强度均得到提高,当PP-g-MAH/PP/GF为15/65/35时,复合材料性能优异,材料断面呈韧性断裂。     

玻璃纤维增强高结晶PP的研究

考察了玻璃纤维(GF)增强高结晶聚丙烯(PP)的力学性能,发现高结晶PP/GF的力学性能较普通PP/GF的提高15%～18%;同时考察了不同增容剂对高结晶PP/GF的力学性能的影响,均聚接枝物拉伸强度、弯曲强度较高,共聚接枝物的冲击强度较高;另外发现在PP/GF中加入山梨醇型α成核剂、芳酰胺类β成核剂后,两者对其性能有较大影响,使其力学性能降低40%以上。     

Fabrication and mechanical properties of glass fiber‐reinforced wood plastic hybrid composites

To fully utilize the resource in the municipal solid waste (MSW) and improve the strength and toughness of wood plastic composites, glass fiber (GF)‐reinforced wood plastic hybrid composites (GWPCs) were prepared through compounding of recycled high‐density polyethylene (HDPE) from MSW, waste wood fibers, and chopped GF. Mechanical tests of GWPCs specimens with varying amounts of GF content were carried out and the impact fractured surface of GWPCs was observed through scanning electron microscope (SEM). The tensile strength of GWPCs and the efficiency coefficient values were predicted by Kelly‐Tyson method. The results indicated that the tensile strength and impact strength of GWPCs could be improved simultaneously by adding type L chopped GF (L‐GF), and would be dropped down when type S chopped GF (S‐GF) was included. The tensile strength of GWPCs was well accordant with the experimental result. The efficiency coefficient values of S‐GF and L‐GF are ?0.19 and 0.63, respectively. Inspection of SEM micrographs indicated that L‐GF had achieved full adhesion with the plastic matrix through addition of maleic anhydride‐g‐polyethylene. The main fracture modes of GWPCs included pullout of GF, broken of matrix, and interfacial debonding. Because of the synergistic effects between hybrid components in GF/wood fiber/HDPE hybrid system, a special 3D network microstructure was formed, which was the main contribution to the significant improvement in the tensile strength and impact strength of L‐GF‐reinforced hybrid composites. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

薄壁塑料件的选材与加工

概述薄壁塑料件的作用及应用,提出薄壁塑料件对材料熔体流动性、冲击强度、刚性、耐热性及阻燃性等性能要求,其中流动性和冲击强度是选材的两项关键性指标;指出适于制作薄壁塑料件的塑料品种主要有(丙烯腈／丁二烯／苯乙烯)共聚物(ABS)、聚碳酸酯(PC)／ABS合金、PC、改性聚苯醚4类;注射成型是加工薄壁塑料件最主要和最经济的方法,分析了成型加工工艺条件、成型设备、模具等对薄壁塑料件成型加工的影响,推荐了注射成型先进工艺。     

Strength of glass-filled modified polyphenylene oxide vibration-welded butt joints

The strengths of glass-filled modified polyphenylene oxide (GF-MPPO) welds relative to the strengths of GF-MPPO are shown to depend on specimen thickness. (Modified polyphenylene oxide is a blend of poly (2,6-dimethyl-1,4-phenylene ether) and high-impact polystyrene.) Relative strengths on the order of 70 and 87 percent can be achieved in 6.1 and 3.18-mm-thick specimens, respectively. Welds of GF-MPPO to modified polyphenylene oxide (MPPO) can easily attain the strength of MPPO, the weaker of the two materials. In contrast to MPPO, in which weld strength decreases with increased weld pressure, the strengths of GF-MPPO to GF-MPPO welds and GF-MPPO to MPPO welds, are not affected by weld pressure.     

长玻璃纤维增强聚丙烯复合材料的力学性能

采用自主开发的在线混合生产设备,以玻璃纤维(GF)和聚丙烯(PP)为原料,制备了长玻璃纤维增强聚丙烯(LFT-PP)复合材料。研究了GF长度、分散度以及界面改性剂对LFT-PP力学性能的影响。结果表明,GF长度的增加,有利于提高LFT-PP的弯曲强度和冲击强度,对弯曲模量的影响很小。添加适量的界面改性剂有利于提高复合材料的弯曲性能,但是降低了其冲击强度。