聚合物增韧增强机理研究进展

总结了橡胶增韧塑料机理,讨论了橡胶粒子形态,结构等因素对增韧效果的影响。介绍了近年来出现的刚性有机填料（ＲＯＦ）增韧塑料的基本概念及冷拉机理。讨论了无机刚性粒子填充聚合物的增强、增韧与粒子的分散及界面的关系。     

聚合物增韧机理的研究进展

总结了橡胶增韧塑料机理,讨论了橡胶粒子形态,结构等因素对增韧效果的影响。介绍了近年来出现的刚性有机填料（ＲＯＦ）增韧塑料的基本概念及冷拉机理。对无机刚性料子填充聚合物的增强及增韧与粒子的分散及界面的关系进行了讨论。     

纳米粒子在聚合物增强增韧中的应用

针对弹性体增韧塑料的状况，介绍了刚性粒子塑料的优点，对纳米粒子的特性，制备方法及表面处理方法作了详细的论述，并报道了纳米粒子与聚合物的物理化学作用，微裂纹化增韧机理，基体层厚度对增韧效果的影响，以及纳米粒子在聚合物增强增韧中的应用情况。     

聚丙烯纳米塑料研究进展

对聚丙烯纳米塑料的研究进展进行了综述 ,重点讨论了层状硅酸盐 /聚丙烯纳米塑料和无机刚性纳米粒子 /聚丙烯纳米塑料的增韧增强机理、制备方法与性能。     

影响橡胶增韧塑料的主要因素

综述了影响橡胶增韧塑料的主要因素,着重探讨了粒子间距对橡胶增韧塑料的影响,最后总结了橡胶增韧塑料的研究重点。     

聚丙烯的共混改性研究

聚丙烯作为一种通用塑料,由于其冲击强度和拉伸强度较低限制了其在工程中的应用。聚丙烯的增强增韧改性已成为使其工程化、功能化、精细化的重要手段。本文综述了聚丙烯共混增强增韧改性的研究,介绍了聚丙烯改性技术的最新进展。     

纳米SiO2在塑料中的应用

本文论述了纳米SiO2粒子增强增韧塑料的机理,纳米SiO2粒子改性聚合物的方法,复合材料的制备技术及其性能.并讨论了近年来纳米SiO2改性塑料的发展状况.     

纳米SiO_2在塑料中的应用

本文论述了纳米SiO2粒子增强增韧塑料的机理,纳米SiO2粒子改性聚合物的方法,复合材料的制备技术及其性能。并讨论了近年来纳米SiO2改性塑料的发展状况。     

纳米SiO2在塑料中的应用

本文论述了纳米SiO2粒子增强增韧塑料的机理,纳米SiO2粒子改性聚合物的方法,复合材料的制备技术及其性能.并讨论了近年来纳米SiO2改性塑料的发展状况.     

纳米CaCO_3及其对塑料改性的研究

简要介绍了纳米CaCO3的性能及表面处理,重点介绍了纳米CaCO3在塑料中的应用现状及增韧增强机理。     

超韧增强剂改性HDPE拉伸一眭能的研究

采用聚乙烯为载体,引入偶联剂处理的CaCO3,弹性体POE,同时加入适量抗氧剂和润滑剂等,制得超韧增强剂,并探讨了超韧增强剂含量对HDPE材料拉伸性能的影响。试验结果表明：随着超韧增强剂含量增加,复合体系拉伸强度呈下降趋势,而拉伸弹性模量则随之上升,当超韧增强剂增加到15％时,断裂伸长率达到最大值,出现脆韧转变。     

环氧树脂增韧研究进展

概述了增韧环氧树脂(EP)的三种主要制备方法,即本体复合法、溶液复合法和机械复合法,综述了EP用增韧剂,如橡胶类弹性体、热塑性聚合物、热致液晶聚合物、超支化聚合物、无机/有机纳米粒子、互穿网络聚合物、复合柔性链段固化剂等及其增韧机理的研究进展,并讨论了增韧EP的物理力学性能、电学性能和热学性能等。最后,对EP增韧改性研究的发展趋势作出了展望。指出随着对增韧机制的深入理解,并基于不断完善的材料基因组技术,探索新的增韧方法和工艺、开发新型多功能增韧剂,可在传统增韧、增强的基础上,进一步改善EP的热性能,并赋予其导热、导电、吸波、电磁屏蔽、阻尼减震等性能。     

ZTA纳米复相陶瓷的研究

综述了近年国内外对ZTA纳米复相陶瓷材料力学性能及影响因素、内部结构、制备工艺及强韧化机理等方面的研究结果.     

无机刚性粒子增韧增强PP研究进展

综述了近些年来无机刚性粒子增韧聚丙烯（PP）的结构设计、刚性粒子粒径及其分布、改性剂种类及用量对增韧增强效果的影响以及无机刚性粒子增韧PP的机理。大量的研究表明，在刚性粒子增韧PP中，弹性体包覆刚性粒子的壳一核结构设计具有优异的增韧效果。在定量分析PP增韧机理方面，介绍了脆韧转变分析中界面黏结判据和粒间距判据，以及有限元方法在此领域的应用，刚性粒子增韧机理主要为界面脱黏到空洞／银纹化损伤和空洞／剪切屈服损伤的转变。此外还介绍了目前刚性粒子与橡胶混杂增韧PP的研究进展。     

等规聚丙烯增韧增强的研究进展

阐述了近年来国内外应用有机聚合物及无机刚性粒子对等规聚丙烯(iPP)增韧增强改性的研究进展,讨论了各种改性手段的优缺点,展望了通过形成纳米级复合材料的方法对iPP增韧增强的前景     

聚乙醇酸材料的加工改性及其水下降解特性的研究进展

从具有广阔应用前景的聚乙醇酸（PGA）材料的物性、加工改性及应用等方面概括了PGA的基本改性原理、改性方法以及加工过程中需要注意的问题；从增韧、增强、增塑、增容等角度，阐述了不同助剂，如增容剂、扩链剂及增塑剂等对PGA材料的改性机理，比较了不同增韧材料与PGA材料相容性及界面互溶增强技术；最终总结了PGA加工性能及使用性能的调控规律。     

Fabrication and properties of monolayer graphene reinforced Al2O3/TiN ceramic tool material

Al₂O₃/TiN/graphene ceramic tool materials were prepared by spark plasma sintering technology and the strengthening and toughening mechanisms were studied. The influence of monolayer graphene content on the mechanical properties and microstructure of the composite material were analyzed and the strengthening and toughening mechanisms were researched. The results showed that with an addition of .5 vol.% graphene the mechanical properties of the material reached the best. The bending strength, hardness, and fracture toughness were 624 MPa, 23.24 GPa, and 6.53 MPa·m^1/2, respectively. Graphene existed in the forms of few-layer and multilayer. The toughening mechanism of few-layer graphene was mainly graphene breaking, and that of multilayer graphene included graphene breaking and pulling-out. Graphene could contribute to the uniform growth of grains due to the excellent electrical conductivity and the high thermal conductivity. The addition of nano-TiN introduced many endocrystalline structures and graphene promoted this phenomenon. Micro-TiN grains made the crack extension show a combination of transgranular fracture, intergranular fracture, crack bridging, and crack deflection, while graphene introduced weak grain interfaces and made the crack appear more branches. The layered graphene made the material fracture change from two-dimension to three-dimension.     

Dynamic mechanical properties of carbon fiber reinforced geopolymer concrete at different ages

In order to improve the strength and toughness of geopolymer concrete (GC) at different ages under impact load, using slag and fly ash as cementitious materials, NaOH and sodium silicate as alkaline activators, carbon fiber as reinforcement, carbon fiber reinforced geopolymer concrete (CFRGC) was prepared. The dynamic compression test of CFRGC was carried out by Φ 100 mm SHPB test system. The effects of age (3 d, 7 d, 28 d) and fiber content on the dynamic mechanical properties of CFRGC were studied, and the strengthening and toughening effects of carbon fiber on GC were analyzed. In addition, the strengthening and toughening effects of carbon fiber on GC and ordinary Portland cement based concrete (PC) were compared and analyzed. The results show that the performance indicators of CFRGC at different ages have strain rate effect under impact load, and the dynamic compressive strength and specific energy absorption of CFRGC increase approximately linearly with the strain rate. With the increase of age, the dynamic compressive strength and specific energy absorption of CFRGC increase, and the strain rate sensitivity of dynamic compressive strength and specific energy absorption also increases. With the increase of carbon fiber content, the dynamic compressive strength and specific energy absorption of CFRGC increase first and then decrease, and the strain rate sensitivity of dynamic compressive strength and specific energy absorption also increase first and then decrease. When the carbon fiber content is 0.2%, the dynamic mechanical properties of CFRGC are the best, and the strain rate sensitivity of performance indicators is the strongest. Carbon fiber has strengthening and toughening effects on GC and PC. When the fiber content is 0.2%, carbon fiber has the best strengthening and toughening effects on GC and PC. The strengthening and toughening effects of carbon fiber on GC is better than that of PC. Compared with 28 d, carbon fiber has better strengthening and toughening effects on GC at the ages of 3 d and 7 d.     

Comparison of sintering behavior and reinforcing mechanisms between 3Y-TZP/Al2O3(w) and 12Ce-TZP/Al2O3(w) composites: Combined effects of lanthanide stabilizer and Al2O3 whisker length

The densification behavior, microstructural development, toughening and strengthening mechanisms of Al₂O₃ whisker-reinforced 3Y-TZP and 12Ce-TZP composites were systematically and comparatively investigated with varying whisker lengths. Compared with 3Y-TZP/A_w composites, the presence of a Ce-Al-Si-O amorphous phase, caused by the addition of Al₂O₃ whiskers, promoted the densification and grain growth of 12Ce-TZP/A_w composites. Crack deflection and bridging are proposed as the primary toughening mechanisms for 3Y-TZP/A_w composites, while the t-m martensitic transformation would dominate the toughening and strengthening processes of 12Ce-TZP/A_w composites. Changes in Al₂O₃ whisker length would vary the distributions of internal stress and amorphous phase within the ceria-stabilized ZrO₂ matrix, and hence affect the toughening and strengthening results. It indicates that effective toughening and strengthening of the Al₂O₃ whisker-reinforced TZP composites can be achieved by taking advantage of collaborative engineering control on the reinforcement morphology and the interface chemistry/structure.