空心玻璃微球填充改性PVC的研究

采用共混法合成了空心玻璃微球／聚氯乙烯（PVC）复合材料,空心玻璃微球使用前先用硅烷偶联剂KH-550进行了表面改性。通过高倍光学显微镜、红外分析仪、电子拉力机、邵氏硬度检测仪等手段研究了空心玻璃微球的含量对PVC抗拉强度,冲击强度和硬度等性能影响。结果表明：随着玻璃微球含量的逐渐增加,PVC复合材料的拉伸强度先增加后...     

空心玻璃微珠表面改性对环氧树脂复合材料性能影响研究

针对空心玻璃微珠填充环氧树脂存在的问题,采用硅烷偶联剂改性空心玻璃微珠填充环氧树脂制备复合材料,通过含水率、吸油值、力学性能等测试考察了硅烷偶联剂对空心玻璃微珠性能及复合材料力学性能的影响。研究发现,硅烷偶联剂通过改变空心玻璃微珠表面性能,减缓空气中水分的侵入;KH591对空心玻璃微珠的表面包覆效果最佳,且KH591改性空心玻璃微珠填充环氧树脂制备的复合材料综合性能最佳——拉伸强度为56.8MPa、弯曲强度为60.05MPa。     

聚氨酯包覆空心玻璃微珠改性环氧复合材料的制备与性能研究

对空心玻璃微珠进行了聚氨酯弹性体包覆改性,然后将其引入到自制的环氧-聚氨酯共聚物(EP-PU)中,制备了聚氨酯包覆空心玻璃微珠改性环氧复合材料,采用XPS、SEM手段对改性后的空心微珠进行了表征,并考察了改性后空心玻璃微珠的引入对固化物性能的影响.结果表明,空心玻璃微珠的表面化学改性改善了其与树脂基体的相容性,当空心玻璃微珠的用量达到树脂质量的20%时,复合材料的密度由原来的1.113 g/cm3降到0.864 g/cm3,降低了22.37%;线性固化收缩率也明显降低,从而增加其固化物的尺寸稳定性.空心玻璃微珠的引入固化物的韧性较好,密度和线性固化收缩率降低.其增韧机理以空心微珠的阻止裂纹扩展和聚氨酯的"海岛结构"为主.     

酚醛空心微球对聚合物基复合材料性能的影响

以混合后的石英纤维、酚醛纤维和酚醛空心微球作为增强体,加入酚醛树脂制备出复合材料。研究了酚醛空心微球不同配比对复合材料各项力学性能、隔热性能、微观形貌的影响。结果表明,酚醛空心微球能降低复合材料的密度,提升隔热性能,降低力学性能。当酚醛空心微球含量为6%时,酚醛空心微球分散均匀,复合材料的隔热性能有明显提升,材料的比拉伸强度和比压缩强度值最大,获得的效益最高。     

稀土钛偶联剂改性HGB对PP性能的影响

采用稀土钛偶联剂对空心玻璃微珠进行表面改性,通过熔融共混挤出法制备了聚丙烯(PP)/空心玻璃微珠复合材料,研究了复合材料的力学性能和结晶性能。结果表明,经过稀土钛偶联剂表面改性的空心玻璃微珠与PP的界面结合力显著提高,提升了复合材料的力学性能,并且使PP的结晶度增大。     

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。     

不同偶联剂对环氧/玻璃微珠复合材料性能的影响

采用KH550、KH560、KH570三种硅烷偶联剂对空心玻璃微珠进行处理,进而使用熔融共混法制备了环氧/玻璃微珠复合材料。运用红外分析手段证实硅烷偶联剂均已成功接枝到空心玻璃微珠表面,借助DSC-TG和万能材料试验机研究了偶联剂种类对环氧/玻璃微珠复合材料固化反应、热稳定性和力学性能的影响。对测试结果的分析表明,空心玻璃微珠的表面处理并未改变环氧与氰酸酯间的固化反应速度。经偶联剂表面改性后,制得的环氧/玻璃微珠复合材料的弯曲和压缩强度显著提高,不同硅烷偶联剂的改性效果不同,其中KH-570改性的综合效果最优。     

PBT/空心玻璃微珠复合材料的性能研究

采用不同硅烷偶联剂对空心玻璃微珠(HGM)进行表面改性,制备了聚对苯二甲酸丁二醇酯(PBT)/改性HGM复合材料。结果表明:改性HGM的加入,提高了复合材料的弯曲强度和拉伸强度,并有效降低了其密度,同时复合材料的冲击强度下降;HGM表面经SG-700型硅烷偶联剂处理后对PBT填充改性的效果较好。     

改性空心玻璃微珠对约束层轻量化影响研究

为制备低密度、高模量的轻量化约束阻尼材料,使用A187对空心玻璃微珠表面进行改性处理,通过扫描电镜观察改性结果。进一步将改性后的空心玻璃微珠加入到约束阻尼涂料中,通过力学性能、极限氧指数、导热系数、复合损耗因子等测试,考察改性后的空心玻璃微珠对约束层各项性能的影响。结果表明：A187可以成功完成表面改性,随着空心玻璃微珠用量的增加,约束层密度降低、模量降低、黏度先降低后升高、氧指数提高、导热系数降低。添加6%改性空心玻璃微珠后,弯曲模量保持率为90.2%,密度降低16.67%,阻尼损耗因子整体温域仅少量降低,降低约束层密度的同时,保证了阻尼材料的降噪特性。     

空心玻璃微珠/环氧树脂复合材料制备及其性能研究

研究了空心玻璃微珠/环氧树脂复合材料制备工艺、配方设计,并对材料的密度、力学性能、表面改性剂、粒径匹配、热性能、介电性能和微观形貌进行了实验研究.结果表明:空心玻璃微珠/环氧树脂复合材料密度在0.28～0.8g/cm3之间可调,抗压缩强度达到4.5MPa～120MPa,空心玻璃微珠表面改性剂的加入,明显提高了复合材料的机械性能,在600～9000MHz频率条件下,其介电性能基本不随频率而变化,介电常数为2.01～2.05,介电损耗角正切为2.57×10-3-2.80×10-3,空心玻璃微珠/环氧树脂复合材料具有较高的使用温度,扫描电镜表明表面改性剂改善玻璃微珠的浸润性,并且验证了空心玻璃微珠级配理论.     

环氧树脂复合泡沫材料的制备研究

以缩水甘油酯环氧树脂(EP)、酸酐固化剂和空心玻璃微珠为主要原料,通过添加一定的活性稀释剂,高温固化制备了EP复合泡沫材料。研究了空心玻璃微珠的表面改性对复合泡沫材料性能的影响。结果表明,复合泡沫材料性能与空心玻璃微珠的表面性能密切相关,当EP/固化剂/稀释剂的质量比为100/120/15、KH-560改性的空心玻璃微珠用量为30份时,所制备的复合泡沫材料密度为0.826 g/cm3,压缩强度达115.8 MPa,比强度为140.2。     

Tensile properties of glass microballoon‐epoxy resin syntactic foams

The effect of hollow glass particle (microballoon) volume fraction in the range of 0.3–0.6 on the tensile properties and fracture mode of syntactic foams is characterized in the present research. Sixteen types of syntactic foams have been fabricated and tested. Four types of glass microballoons, having 220, 320, 380, and 460 kg/m³ density, are used with epoxy resin matrix for making the syntactic foam samples. These foams contain 30, 40, 50 and 60% microballoons by volume. All types of microballoons have the same size but different wall thickness, which reflects as a difference in their density. It is observed that the tensile strength increases with a decrease in the volume fraction of microballoons. All types of syntactic foams showed 60–80% decrease in the tensile strength compared with that of the neat resin. The foams containing low strength microballoons showed lower tensile modulus compared with that of the neat resin, but the presence of high strength microballoons led to an increase in the tensile modulus of the composites. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 1254–1261, 2006     

Poly(methyl methacrylate) hybrid syntactic foams with hollow glass microspheres and polyhedral oligomeric silsesquioxanes

The study aims to produce poly(methyl methacrylate) (PMMA)-based lower density syntactic foams with hollow glass microspheres (HGMs) and to improve their mechanical properties by the addition of polyhedral oligomeric silsesquioxanes (POSSs) while maintaining the thermal properties of the neat polymer. First to understand the effect of POSS addition, PMMA–POSS composites with octaisobutyl and octaphenyl POSS were produced through extrusion. Higher relative flexural and impact strengths were obtained with POSS addition to PMMA. Obtaining more enhanced properties with octaphenyl POSS, PMMA-HGM-POSS hybrid syntactic foams were prepared with this additive. In general, the specific flexural strength and modulus of the PMMA syntactic foams were improved with the POSS loading, while the lower density and thermal properties of the PMMA syntactic foams were maintained. PMMA hybrid syntactic foams with 15 wt % HGMs and 0.25 wt % POSS exhibited 37.6% improvement in the specific flexural modulus with respect to the neat PMMA. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48368.     

聚氨酯复合泡沫塑料的准静态压缩力学性能

针对几种不同密度、不同空心球填充比的聚氨酯复合泡沫塑料进行了准静态压缩实验，研究了这类材料的宏观力学性能。结果表明，复合泡沫塑料的密度仍是影响其力学性能的主要因素，并且在低速压缩下具有明显的应变率效应。此外，发现空心玻璃微珠对泡沫塑料有明显的增强效果，且不同密度的泡沫塑料均存在某一临界填充比，超过该填充比，复合泡沫塑料的力学性能可能会恶化。     

高密度聚氨酯硬泡塑料／玻纤粉复合材料的研究

以聚醚多元醇、PAPI、催化剂、发泡剂和玻璃纤维等为原料,制备高密度聚氨酯硬泡及它与磨碎玻纤粉的复合材料。研究了不同密度硬泡的强度及磨碎玻纤粉粒径、预处理及其含量对复合材料强度的影响,不同复合材料的热稳定性。结果表明,随着密度的增加,硬泡的各种强度值总体上均呈逐渐增加趋势,其中500kg/m^3的聚氨酯的拉伸强度比200kg/m^3的提高了104．74％,冲击强度提高了194．84％;400目粒径的玻纤粉可使复合材料具有更高的拉伸强度、弯曲强度及压缩强度;玻纤的加入将降低材料的强度值,但偶联剂预处理可使它们有所改善;加入磨碎玻纤粉后,材料的热稳定性增加,且采用偶联剂KH550对玻纤粉进行预处理可进一步改善复合材料的耐热性能。     

木粉粒径对木塑复合材料性能的影响

采用不同粒径的木粉填充高密度聚乙烯制备木塑复合材料，研究了木粉粒径对木塑复合材料力学性能和加工流动性的影响。结果表明：木粉粒径对复合材料性能的影响十分明显，较大粒径的木粉有利于复合材料弯曲性能和冲击强度的提高。木粉粒径从100μm增加到850μm，复合材料弯曲强度增加10．4％，弯曲模量增加56．3％，冲击强度增加14．6％。随木粉粒径的增大，拉伸强度呈现先上升后下降的趋势，在200μm时出现最大值。木粉粒径对熔体流动速率（MFR）和密度的影响十分明显，大粒径的木粉使复合材料具有较高的MFR和较低的密度。     

Effect of cenosphere surface treatment and blending method on the tensile properties of thermoplastic matrix syntactic foams

The influence of cenosphere surface treatment and blending method on the properties of injection molded high‐density polyethylene (HDPE) matrix syntactic foams is investigated. Cenospheres are treated with silane and HDPE is functionalized with dibutyl maleate. Tensile test specimens are cast with 20, 40, and 60 wt % of cenospheres using injection molding. Modulus and strength are found to increase with increasing cenosphere content for composites with treated constituents. Highest modulus and strength were observed for 40 and 60 wt % untreated mechanically mixed and treated brabender mixed cenospheres/HDPE blends, respectively. These values are 37 and 17% higher than those for virgin and functionalized HDPE. Theoretical models are used to assess the effect of particle properties and interfacial bonding on modulus and strength of syntactic foams. Brabender mixing method provided highest ultimate tensile and fracture strengths, which is attributed to the effectiveness of Brabender in breaking particle clusters and generating the higher particle–matrix surface area compared to that by mechanical mixing method. Theoretical trends show clear benefits of improved particle–matrix interfacial bonding in the strength results. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43881.     

Kinetics of wear of epoxide coating modified with glass microspheres and exposed to the impact of alundum particles

The influence of epoxide coating modification with glass microspheres on the erosive wear of the coating is discussed in this paper. Increase in the resistance to erosive wear of a three-layer epoxide coating including the interlayer modified with glass microspheres of a diameter <30 μm and a mass fraction of 10% was obtained. It can be accounted for by the damping of energy which is released during the collision between the impact particle and the organic surface and then dumped by the glass microspheres.     

中间相沥青基泡沫炭的研究进展

不同的原料和方法所制备的泡沫炭结构和性能也有所不同,本文阐述了以石油系、萘系和煤沥青为原料制备中间相沥青基泡沫炭的制备工艺以及常用的改性方法。指出泡沫炭主要有五边形十二面体和球形气孔状两种结构,具有密度小、强度高、良好的导电和导热等优异性能,并展望了泡沫炭的应用及发展方向。