空心玻璃微珠填充改性双马来酰胺树脂复合材料耐热性能的研究

采用空心玻璃微珠填充改性双马来酰胺树脂(BMI),研究了玻璃微珠用量、粒径及表面处理对材料性能的影响,并用热机械分析仪(TMA)测定了材料的线膨胀系数。结果表明:随着玻璃微珠质量分数的增加,马丁耐热温度提高,线膨胀系数呈降低的趋势,小粒径(10μm)和经过表面处理的玻璃微珠对马丁耐热温度改性的效果更加显著。     

空心玻璃微珠填充改性双马来酰胺树脂复合材料耐热性能的研究

采用空心玻璃微珠填充改性双马来酰胺树脂（BMI），研究了玻璃微珠用量，粒径及表面处理对材料性能的影响，并用热机械分析仪（TMA）测定了材料的线膨胀系数。结果表明随着玻璃微珠质量份数的增加马丁耐热温度提高，线膨胀系数呈降低的趋势，小粒径（10μm）和经过表面处理的玻璃微珠对马丁耐热温度改性的效果更加显著。     

空心玻璃微珠填充改性双马来酰胺树脂复合材料耐热性能的研究

采用空心玻璃微珠填充改性双马来酰胺树脂（BMI），研究了玻璃微珠用量，粒径及表面处理对材料性能的影响，并用热机械分析仪（TMA）测定了材料的线膨胀系数。结果表明随着玻璃微珠质量份数的增加马丁耐热温度提高，线膨胀系数呈降低的趋势，小粒径（10μm）和经过表面处理的玻璃微珠对马丁耐热温度改性的效果更加显著。     

空心玻璃微珠表面改性对双马来酰亚胺树脂性能的影响

介绍了用硅烷偶联剂(KH-550)与钛酸酯偶联剂处理空心玻璃微珠的方法;研究了处理剂用量与玻璃微珠加入量对改性双马来酰亚胺树脂压缩强度及马丁耐热温度的影响。结果表明,KH-550和钛酸酯偶联剂质量分数分别为1%、0．8%时,其偶联改性的效果最好。随着玻璃微珠质量分数的增加,体系压缩强度呈降低的趋势,马丁耐热温度提高,其中KH-550偶联改性的效果优于经钛酸酯偶联剂改性的效果。     

空心玻璃微珠填充环氧树脂复合材料压缩性能研究

制备了空心玻璃微珠 (HGM )填充环氧树脂复合材料 ,对材料进行了单轴静态压缩实验。研究了HGM的粒径和体积分数 (Vf)对材料压缩性能的影响 ,研究发现 ,Vf增大 ,材料中HGM外部空气泡的含量增大 ;材料的压缩强度和压缩模量可在 5 0～ 10 0MPa和 1.5 0～ 1.80GPa之间调节 ;材料断裂应变较小 ,用扫描电镜观察了其结构形态和破坏形式 ,断裂面与应力方向约成 45°角 ,破坏主要由HGM的破裂引起 ;HGM粒径减小 ,材料压缩强度增大 ;Vf 增大 ,压缩强度减小 ,压缩模量先增大后减小 ,断裂应变减小。用改进Turcsanyi方程对压缩强度进行了模拟计算 ,材料的密度与计算值基本一致     

空心玻璃微珠填充环氧/氰酸酯复合材料的力学性能与耐热性能

以空心玻璃微珠为填充剂,环氧/氰酸酯共固化物为基体,制备出一种新型高性能复合材料,借助热失重分析仪(TGA)、动态热机械分析仪(DMA)、万能材料试验机、冲击试验机、扫描电子显微镜(SEM)等现代分析测试技术对复合材料的力学性能和耐热性进行研究。结果表明:随着玻璃微珠用量的增加,复合材料的弯曲模量变化不大,基本保持在2.5 GPa左右,而压缩和冲击强度则呈现先升高后下降的变化趋势;结合冲击断面的SEM照片对材料的力学性能进行分析,从整体结果来看,当玻璃微珠用量为3%时,复合材料的综合性能最佳。     

空心玻璃微珠填充改性PS复合材料的性能

采用熔融共混挤出的方法,制备不同空心玻璃微珠含量的PS复合材料,研究空心玻璃微珠对复合材料力学性能和热稳定性的影响.结果表明:经过表面处理的空心玻璃微珠与PS的相容性显著提高,空心玻璃微珠质量含量为5%时,复合材料获得最大拉伸强度、弯曲强度和冲击强度.     

中空玻璃微珠填充PP复合材料耐热性能研究

采用不同粒径的中空玻璃微珠(HGB)填充聚丙烯(PP)。应用热变形温度仪测量了复合材料试样的热变形温度(td)。结果表明．在较低的弯曲载荷下，随着HGB体积分数的增加．试样的td值明显增大；而在较高的弯曲载荷下，试样的td值的提高放缓．甚至有所下降。当载荷及微珠含量一定时，td随着HGB粒径的增加而呈非线性函数形式增大。     

空心玻璃微珠填充PP复合材料的结构与性能研究

采用偶联剂KH－550处理空心玻璃微珠，在宽广的用量范围内考察了玻璃微珠含量对PP复合材料拉伸强度、冲击强度、流变性能的影响；研究了复合材料的耐热性能和相态结构，对材料冲击断裂面进行了扫描电镜分析。研究结果表明：与未活化的玻璃微珠相比，填充活化玻璃微珠的复合材料的拉伸强度、冲击强度明显提高；一定用量的玻璃微珠填充PP不仅可以使材料的力学性能和耐热性能保持较好，而且能够降低PP复合材料的成本。     

空心玻璃微珠填充MC尼龙复合材料的研究

对空心玻璃微珠填充铸型(MC)尼龙进行了系列研究,考察了空心玻璃微珠含量、粒径及表面处理对MC尼龙性能的影响。结果表明,空心玻璃微珠改性MC尼龙复合材料的物理性能和力学性能优良,当加入10％表面处理的空心玻璃微珠时,制品的收缩率下降,热变形温度提高20℃以上,制品具有填料分布均匀、外观光泽优良等优点。与未处理的空心玻璃微珠相比,填充经表面处理空心玻璃微珠的复合材料拉伸强度、弯曲强度、断裂伸长率分别提高了15．7％、12．2％和246％。空心玻璃微珠的粒径愈小,复合材料的力学性能愈好。一定用量的玻璃微珠填充MC尼龙不仅可以使材料保持较好的力学性能和耐热性能,而且能够降低MC尼龙复合材料的成本。     

废旧三元乙丙橡胶粉和空心玻璃微珠填充改性PP的性能

采用熔融共混挤出的方法制备了聚丙烯(PP)/废旧三元乙丙橡胶(WEPDM)粉/空心玻璃微珠(HGB)复合材料,研究了w(WEPDM)和w(HGB)对复合材料力学性能的影响.结果表明:w(WEPDM)为20％时,PP/WEPDM复合材料拉伸强度最大;WEPDM粉的加入可提高复合材料冲击强度,但会降低其弯曲应力;w(WEP...     

影响中空玻璃微珠填充PS复合材料性能的因素

研究了中空玻璃微珠的表面改性和粒径分布,苯乙烯-丁二烯-苯乙烯弹性体(SBS)的加入对聚苯乙烯(PS)/中空玻璃微珠复合材料力学性能的影响.结果表明:硅烷偶联剂KH550对中空玻璃微珠的表面改性效果优于KH560;粒径分布窄的中空玻璃微珠填充PS复合材料具有较高的拉伸强度、弯曲强度和冲击强度:SBS的加入可以提高复合材料的力学性能,尤其可以大幅提高简支梁缺口冲击强度.     

Ultralow-k hollow glass microsphere filled perfluoroalkoxy composites

Perfluoroalkoxy (PFA) composites filled with different volume fractions of hollow glass microsphere (HGM) and HGM/PFA–HGM/HBO₃–HGM/PFA sandwich layered composites were prepared by simple dry mixing and hot-pressing process. The dielectric frequency and temperature response characteristics, thermal expansion coefficient, and mechanical strength were investigated as a function of the loading fraction of HGM fillers. The obtained .6V_fHGM/.4V_fPFA composite demonstrates ultralow-k (ε_r ∼ 1,63@1 MHz; 1.57@10 GHz) with low-dielectric loss (∼7.2 × 10⁻⁴@1 MHz; ∼1.73 × 10⁻³@10 GHz), water absorption of ∼1.21%, in-plane thermal expansion coefficient of 42 ppm/°C, and temperature coefficient of dielectric permittivity (τ_εr) of ∼−92 ppm/°C. The temperature stabilities of dimension and dielectric permittivity for the .6V_fHGB/.4V_fPFA composite could be substantially improved by forming .6V_fHGM/.4V_fPFA–.6V_fHGM/.4V_fHBO₃–.6V_fHGM/.4V_fPFA sandwich–layered composite, which still maintained reasonable dielectric properties and mechanical rigidity with flexural strength of ∼8.1 MPa.     

中空玻璃微珠填充聚氨酯发泡材料的吸声性能与动态力学性能研究

以聚氨酯（PU）为基体、磷酸三甲酚酯（TCP）为增塑剂、中空玻璃微珠（HGB）和偶氮二甲酰胺（AC发泡剂）为填料,采用熔融共混法制备了软质PU/TCP、PU/TCP/HGB、PU/TCP/HGB/AC材料,研究了增塑剂TCP、填料HGB和AC发泡剂的含量对PU材料的吸声性能和动态力学性能的影响。结果表明,在一定范围内,增塑剂TCP、填料HGB和AC发泡剂的加入显著提升了复合材料的吸声性能,当TCP含量为25 %（质量分数,下同）、HGB含量为10 %、AC含量为2 %时,材料的吸声性能最佳,平均吸声系数达到0.29,且频率为1 714 Hz时吸声系数最大,为0.55;以半峰宽衡量材料的吸声频率宽度,发现在一定范围内增塑剂TCP、填料HGB和AC发泡剂对半峰宽的长度分别有减少、增加的作用,为制备轻质宽频吸声材料提供了实验依据;对PU/TCP、PU/TCP/HGB材料的动态力学性能分析进一步验证了选用25 % TCP和10 % HGB配比对材料整体性能调控的合理性。     

空心玻璃微珠/环氧复合材料的制备及性能研究

制备了空心玻璃微珠/环氧复合材料。通过力学性能、固化收缩率、热性能等测试考察了空心玻璃微珠粒径、填充量、硅烷偶联剂处理对树脂及固化物性能的影响。结果表明,硅烷偶联剂改善了空心玻璃微珠与树脂基体的相容性。复合材料的力学性能随着空心微珠粒径减小而增大。随着空心微珠填充量的加大,固化物拉伸强度有所降低,冲击强度和弯曲强度在空心玻璃微珠质量分数为2%时达到最大值,比纯树脂分别提高了30%和34.2%,同时材料的固化收缩率和密度降低,玻璃化转变温度升高。     

改性空心玻璃微珠/环氧树脂复合材料力学性能研究

采用偶联剂对玻璃微珠表面进行改性处理,借助超声波振动,使改性空心玻璃微珠在环氧树脂中均匀、稳定分散,增强了玻璃微珠与环氧树脂之间的相容并探讨了改性空心玻璃微珠对环氧树脂力学性能的影响。结果表明,复合材料中改性空心玻璃微珠添加质量分数为3%时,其拉伸强度达到最大值68.54 MPa,与空白样相比提高了20.3%;冲击强度达到最大值24.42 kJ/m2,比纯环氧树脂提高了166%;KIC(断裂韧性)达到最大值2.338 MPa/m2,是空白试样的2.27倍,增韧效果较为明显。     

Tensile properties of hollow glass bead‐filled polypropylene composites

The tensile properties of polypropylene (PP) filled with hollow glass beads have been measured at room temperature to identify the effects of the particle contents, size and its distribution on them in the present article. The mean diameters of the fillers were 11, 35, and 70 μm, and they were named as TK10, TK35, and TK70 respectively. The surface of these particles was pretreated with silane coupling agent. The results showed that the yield stress (σ_y) decreased gently for PP/TK70 systems, whereas decreased relatively obviously for PP/TK35 systems with increasing the volume fraction (?_f) of the fillers. When ?_f was less than 5%, the tensile strength at break (σ_b) of the composites increased with the increase of ?_f. When ?_f was more than 5%, σ_b was almost a constant for PP/TK70 systems, while σ_b decreased linearly for PP/TK35 systems. The tensile fracture strain (ε_b) of the composites decreased suddenly when ?_f was less than 5%, and then decreased slightly with increasing ?_f. When ?_f was 10%, σ_y and σ_b increased while ε_b decreased with the increase of the bead diameter. Furthermore, the σ_y was predicted by means an equation proposed in the previous work, and good interfacial adhesion was shown between the hollow glass beads and the matrix. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 1697–1701, 2007     

Effect of hollow glass beads on density and mechanical properties of silicone rubber composites

In this work, low density hollow glass beads (HGB)/silicon rubber (SR) composites were prepared by solution method and flocculation process. The prepared samples were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, tensile test, and friction test. The results show that the densities of SR composites decrease from 1.140 to 0.792 g/cm³ with the addition of HGB. By comparing theoretical density with true density, it can be estimated that the ratio of shattered HGB increase from 8.79% to 24.76%. Especially, the mechanical properties of SR composites were improved by surface modification of HGB. By adding surface-modified HGB at 5 and 10 wt%, the tensile strengths of SR composites were enhanced by 17.8% and 28.2%, respectively. In addition, tear strength, shore A hardness, compression set, and friction property were significantly ameliorated. Furthermore, the mechanism of surface-modified HGB in mechanical properties was analyzed.     

中空微球填充PP复合材料传热的有限元分析

应用ANSYS软件对中空微球填充聚丙烯复合材料单元中的热传递进行了有限元模拟，并计算出等效导热系数(keff)。结果表明，keff随着中空微球体积分数的增加呈线性函数形式下降，且随着微球粒径的增加有所减小。此外，三维有限元模拟的keff值高于二维，两者的差异随着中空微球体积分数的增加而增大。     

Surface structure of silane-treated glass beads and its influence on the mechanical properties of filled composites

The surface treatment of glass beads, chosen as a model filler, was carried out using four different silane coupling agents with multilayer coverage. For this purpose, silanes having an aminopropyl or a methacryloxypropyl group as an organofunctional group with di- or tri-alkoxy structures were used. The amount of silane detected on the bead surface was four to six times that required for a monolayer coverage. The topography of the silane layer on the bead surface was observed using an atomic force microscope. The topography was strongly affected by the composition of the silane solution and the number of alkoxy groups in the silane. The effects of the organofunctional group and the number of alkoxy groups of the silanes on the mechanical properties of bead-filled poly(vinyl chloride), chosen as a typical ductile polymer, were investigated. A higher yield stress was observed for the silane with an aminopropyl group than for that with a methacryloxypropyl group. Furthermore, for each organofunctional group, the yield stress was higher for the silane with a dialkoxy structure than for that with a trialkoxy structure. However, their effects on the elongation-at-break were contrary to the above tendencies.