玻璃纤维增强RRIM聚氨酯材料的研究

应用扫描电镜,研究了RRIM聚氨酯材料中玻璃纤维的分布状况。探讨了玻璃纤维含量、玻璃纤维取向对RRIM聚氨酯材料性能的影响。揭示了RRIM聚氨酯材料中玻璃纤维与聚氨酯材料的连接状态。     

长玻纤增强聚氨酯复合材料弯曲应力-应变试验研究

针对长玻纤增强反应注射成型聚氨酯复合材料(RRIM-PU)进行了弯曲性能测试试验,研究了玻纤质量分数及玻纤长度对RRIM-PU复合材料弯曲性能的影响,得到了弯曲应力-应变曲线。同时结合扫描电子显微镜(SEM)观察微观组织结构,分析了玻纤在基体中的增强作用及制品弯曲破坏机理。研究结果表明:玻纤质量分数30%,玻纤长度25 mm的复合材料制品具有最佳的弯曲性能。     

增强反应注射成型聚氨酯

增强反应注射成型聚氨酯(RRIM)是继反应注射成型聚氨酯(RIM)之后的又一发展极为迅速的新材料。RRIM聚氨酯是在RIM聚氨酯中加入增强填料,使各项性能得到改善,可满足汽车工业及其他工业对材料高性能要求。RRIM聚氨酯的特点是模量大、耐热性好、膨胀系数小,比RIM聚氨酯具有更好的性能,特别适宜作汽车外体材料。因此虽然只有六年的发展过程(自第一台RRIM聚氨酯成型机问世计算),RRIM聚氨酯制品     

新型聚氨酯玻璃钢门窗走进东北市场

<正>新型聚氨酯玻璃钢门窗型材是以玻璃纤维为增强材料,以聚氨酯为基体,通过先进的拉挤工艺生产出来的新型复合材料。此型材由江苏源盛复合材料公司与德国拜耳公司历时3年共同开发,使用的基材聚氨酯是拜耳公司专利产品,并由其提供。该型材整体性能在保     

玻璃纤维对RRIM-PU工艺及性能的影响

采用国产锤磨玻璃纤维和短切玻璃纤维,研究其对RRIM-PU的增强作用和工艺性能的影响。实验结果表明,长玻璃纤维有着更显著的增强效果。随着玻璃纤维用量的增加,增强效果变大。玻璃纤维长度和使用量的增加,均使玻璃纤维-聚醚多元醇悬浮体系的粘度增加,从而导致PU-RRIM工艺性能变差。     

增强聚氨酯硬泡塑料的冲击性能研究

本文研究了SiO2和纤维增强剂对于聚氨酯硬泡塑料冲击性能的增强效应.试验结果表明,加入SiO2并不能增强聚氨酯硬泡塑料冲击性能.然而以2.5% KH550偶联剂四氢呋喃溶液处理的玻璃纤维作为增强剂,能使聚氨酯硬泡塑料的冲击性能有显著的提高.     

新型聚氨酯玻璃钢门窗走进东北市场北大核心

新型聚氨酯玻璃钢门窗型材是以玻璃纤维为增强材料,以聚氨酯为基体,通过先进的拉挤工艺生产出来的新型复合材料。此型材由江苏源盛复合材料公司与德国拜耳公司历时3年共同开发,使用的基材聚氯酯是拜耳公司专利产品,并由其提供。该型材整体性能在保温、隔热、强度、阻燃、寿命方面比塑钢窗具有极其显著的优势,在展会上备受关注。     

玻璃纤维及复合材料耐酸性能研究

针对两种不同的玻璃纤维进行了耐酸性能研究,并对两种不同的玻璃纤维制备的复合材料的耐酸性能进行了试验。研究结果表明：LB玻璃纤维的耐酸侵蚀性能大大提高,同条件下的酸侵蚀失重仅为普通无碱玻璃纤维的1/10。对耐酸玻璃纤维增强树脂材料的酸侵蚀性能研究表明,使用耐酸玻璃纤维增强的玻璃钢复合材料的耐侵蚀性能大大提高,其在酸性环境下的使用寿命可以明显延长。     

RTM制备玻璃纤维增强环氧树脂复合材料的力学性能分析

以环氧树脂为基体,短切玻璃纤维和玻璃纤维布为增强材料,通过RTM工艺制备了玻璃纤维增强环氧树脂(GF/EP)复合材料,并研究了RTM工艺制备玻璃纤维布增强环氧树脂(L-GF/EP)和短切玻璃纤维增强环氧树脂(S-GF/EP)复合材料的拉伸和弯曲性能,分析了开孔对两种复合材料拉伸性能的影响。结果表明:在拉伸过程中,开孔试样因孔边产生的应力集中,导致其拉伸强度与无孔试样相比下降了30%左右;玻纤铺层类型的不同对复合材料的力学性能具有显著影响;L-GF/EP复合材料内部结构完整,在载荷作用下,复合材料的弯曲断裂呈现一定的假塑性断裂模式,达到弯曲极限挠度值后,出现一定程度的回弹现象,其力学性能优于S-GF/EP复合材料。     

玻璃纤维增强复合材料工程化应用进展

介绍了玻璃纤维增强树脂基复合材料的特点及成型方法,并介绍了玻璃纤维增强复合材料用于风电叶片、风电联轴器、复合材料板弹簧、聚氨酯轨枕以及多功能履带板的工程化应用研究实例。展望了玻璃纤维增强复合材料在轨道交通、汽车工业等领域的工程化应用前景及发展方向。     

增强反应注射成型聚氨酯及其性能研究

以反应注射成型聚氨酯（ＲＩＭ－ＰＵ）为基体树脂，研制了以玻纤增强剂的增强反应注射成型聚氨酯（ＲＲＩＭ－ＰＵ）材料。讨论了原材料及玻纤对ＲＲＩＭ－ＰＵ加工工艺及材料性能的影响。结果表明，以碳化二亚胺改性的异氰酸酯（ＣＭ－ＭＤＩ）和低聚合异氰酸酯改性的异氰酸酯（ＰＡＰＩ）混合物与丙腈－－苯乙烯接枝改性环氧乙烷封端的聚醚二元醇（ＡＰＧ）为主要原料，玻纤长度不大于１．５时，不仅ＲＲＩＭ加工工艺性好，而且Ｒ     

风电叶片用EP胶粘剂的研究

以不同增韧剂改性EP(环氧树脂)为基体树脂,采用曼尼希改性胺为固化剂制备了不同改性EP胶粘剂。研究结果表明:当增韧剂为聚氨酯(PU)预聚体时,相应的改性EP胶粘剂的粘接性能优异;在上述体系中加入玻璃纤维增强填料后,相应的改性EP胶粘剂的综合力学性能和粘接性能俱佳,其拉伸强度超过75.00 MPa、拉伸模量超过4.00 GPa、断裂伸长率超过4.00%且90°剥离强度超过10.00 kN/m,属于高韧性EP胶粘剂,并且完全满足风电叶片的使用要求。     

UP/PU嵌段共聚树脂/玻璃纤维界面粘结性的研究

合成了一种异氰酸酯嵌段共聚改性不饱和聚酯树脂(UP/PU),并以玻纤增强制备了复合材料(GFRP)。通过接触角、拉伸性能、弯曲性能测定和扫描电镜观察研究了UP/PU GFRP界面的粘结性能。结果表明:UP/PU树脂与玻璃表面的接触角为20°,对玻璃表面的润湿性较通用邻苯型UP好;GFRP拉伸强度1 050 MPa,弯曲强度1 220 MPa,较通用邻苯型UP的GFRP分别提高了145%和78%,说明UP/PU与玻纤的界面粘结性能较好。     

Study on the mechanical properties of hybrid reinforced rigid polyurethane composite foam

The mechanical properties of hybrid reinforced rigid polyurethane (PU) foams were investigated with the reinforcing agent SiO₂ and fibers. The effect of content of SiO₂ and fibers and the effect of length of fibers on the properties of the PU composite foam were emphatically analyzed. The experiment results show that the tensile strength of the PU composite foam is optimal when the content of SiO₂ and glass fiber is 20 and 7.8%, respectively. Furthermore, the reinforcing effect of glass fiber, Nylon‐66 fiber, and PAN‐matrix carbon fiber were compared and the results show that the tensile strength of the PU composite foam reinforced with 3–5% carbon fiber is optimal. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 1493–1500, 2004     

增强改性PA6研究进展

介绍了玻璃纤维、晶须、碳纳米管和热致液晶高分子材料增强改性聚酰胺6(PA6)的方法,并对其影响因素进行了分析。结果表明:4种增强材料均可提高PA6的力学性能;玻璃纤维是最常用的PA6增强材料,而短切玻纤因其易加工成、本低及良好的力学性能而被广泛应用。     

Prospect of nanoscale interphase evaluation to predict composite properties

For meeting the requirements of lightweight and improved mechanical properties, composites could be tailor-made for specific applications if the adhesion strength which plays a key role for improved properties can be predicted. The relationship between wettability and adhesion strength has been discussed. The microstructure of interphases and adhesion strength can be significantly altered by different surface modifications of the reinforcing fibers, since the specific properties of the interphase result from nucleation, thermal and/or intrinsic stresses, sizing used, interdiffusion, and roughness. The experimental results could not confirm a simple and direct correlation between wettability and adhesion strength for different model systems. The main objective of the work was to identify the interphases for different fiber/polymer matrix systems. By using phase imaging and nanoindentation tests based on atomic force microscopy (AFM), a comparative study of the local mechanical property variation in the interphase of glass fiber reinforced epoxy resin (EP) and glass fiber reinforced polypropylene matrix (PP) composites was conducted. As model sizings for PP composites, γ-aminopropyltriethoxysilane (APS) and either polyurethane (PU) or polypropylene (PP) film former on glass fibers were investigated. The EP-matrix was combined with either unsized glass fibers or glass fibers treated with APS/PU sizing. It was found that phase imaging AFM was a highly useful tool for probing the interphase with much detailed information. Nanoindentation with sufficiently small indentation force was found to be sufficient for measuring actual interphase properties within a 100-nm region close to the fiber surface. Subsequently, it also indicated a different gradient in the modulus across the interphase region due to different sizings. The possibilities of controlling bond strength between fiber surface and polymer matrix are discussed in terms of elastic moduli of the interphases compared with surface stiffness of sized glass fibers, micromechanical results, and the mechanical properties of real composites.     

UHMWPE/PP/PP基无机填料母粒复合材料的制备及表征

研究自制的PP基增强母粒对UHMWPE/PP共混体系的增韧、增强作用,并通过力学性能测试及扫描电子显微镜研究其增韧、增强效果.结果表明,PP基玻璃纤维(GF)母粒对UHMWPE/PP共混体系的增韧、增强作用优于添加增容剂聚丙烯接枝马来酸酐(PP-g-MAH)、GF的简单混合方法,这是因为前者试样中GF与UHMWPE/PP共混体系界面粘结的牢固程度大于后者.UHMWPE/PP共混体系中加入PP基纳米CaCO3母粒能够同时起到增强和增韧的作用.     

聚氨酯/UP树脂互穿网络硬质泡沫塑料的研究

对聚氨酯/UP树脂互穿网络硬质泡沫塑料体系进行了研究。通过改变UP树脂用量,得到提高压缩强度的优化配方,并对短切玻璃纤维的增强效果进行了研究,同时对该互穿网络微观结构及制备工艺进行了初步探讨。     

Interpenetrating polymer networks of polyurethane and furfuryl alcohol,IIa. Processability and properties of pultruded fiber-reinforced composites

A feasibility study of pultrusion of fiber-reinforced polyurethane/furfuryl alcohol (PU/FA) interpenetrating polymer/network IPN composites has been made. From the viscosity study, it was found that the pot life of the PU/FA IPN prepolymers increased with PU content and showed high reactivity at elevated temperature. It was confirmed from the morphological study that the wetting of fibers by the PU/FA IPN resins was improved with PU content. The appearance of the tensile failure surfaces of the pultruded glass fiber-reinforced PU/FA IPN composites showed “hackle patterns” for PU contents below 15 phr. The mechanical property study shows that the tensile strength of pultruded PU/FA IPN composites is the highest when the PU content is 5 phr. However, the flexural strength, flexural modulus and HDT decreased with PU content. The mechanical properties of various fiber-reinforced (glass, carbon, and Kevlar 49 aramid fiber) pultruded PU/FA IPN composites increased with fiber volume content.