ABS阻燃与抑烟性的研究

对ABS树脂的阻燃、抑烟性等性能进行了研究和探讨。实验结果表明,采用共混、添加复合阻燃剂、抑烟剂的方法可以有效地获得阻燃、抑烟性及其他性能皆优的ABS树脂体系。     

PFF与PUF热稳定性及燃烧性能研究

制备了酚醛泡沫和聚氨酯泡沫，并研究了酚醛硬泡与聚氨酯硬泡的热稳定性及燃烧性能。结果表明：和聚氨酯泡沫比较，酚醛泡沫的热失重小，热释放速率和热释放总量低。因此酚醛泡沫的热稳定性和阻燃性能明显优于聚氨酯泡沫。     

超细粉体微胶囊红磷阻燃剂的研制

红磷经湿法研磨预处理，在一定pH值（9．0－9．5），表面活性剂用量为0．8％－1．0％，2200Hz超声波振荡15min后，采用蜜胺树脂预聚体原位法包覆，制得了微胶囊红磷阻燃剂的超细粉体，其平均粒径为2．186um，并探讨了预处理，PH值，表面活性剂及超声波对粒度的影响。     

SnO2和SiO2用于PVC的阻燃消烟及协同作用

研究了二氧化锡和二氧化硅对软PVC阻燃消烟性的影响。通过对极限氧指数、剩炭率、烟密度的测定和DTATG曲线的分析证明,添加8g二氧化锡/二氧化硅复合阻燃剂的PVC的氧指数和剩炭率比未添加的分别增高5.5个单位和4.1%,烟密度降低16.4%,降解活化能分别降低38kJ/mol和23.1kJ/mol,从而证明二氧化锡/二氧化硅复合阻燃剂对于PVC是一种很好的阻燃消烟剂,二氧化锡和二氧化硅有很好的协同作用。同时证明这种复合阻燃剂能代替三氧化二锑,使产品的成本进一步降低。     

氢氧化镁表面处理工艺对阻燃PP性能的影响

为改善氢氧化镁[Mg(OH)2]与聚丙烯(PP)的相容性，将来源不同的两种Mg(OH)2进行表面处理后加入PP中，并对其表面性能、阻燃性能和力学性能进行了测试。结果表明，PP中添加占复合材料总质量65％的Mg(OH)2，其阻燃级别能达到V-0级，氧指数接近30％；且改性后的Mg(OH)2能大大改善阻燃PP的力学性能。同时通过比较不同偶联剂和处理方法对包覆效果的影响，选出了Mg(OH)2表面处理的较优工艺。     

碳酸钙对乙烯-丙烯酸丁酯共聚物阻燃与力学性能及热降解行为影响研究

采用极限氧指数法、热重分析和差示扫描量热分析等研究了碳酸钙（CaCO3）对乙烯-丙烯酸丁酯共聚物（EBA）阻燃及热降解行为的影响，探讨了CaCO3对EBA力学性能和熔体流动速率的影响。结果表明，CaCO3降低了EBA的拉伸强度、断裂伸长率和熔体流动速率，但复合阻燃材料仍具有良好的加工性能；当CaoCO3含量为60％（质量分数，下同）时，阻燃材料的极限氧指数可达28．5％。CaCO3通过EBA在热降解过程中与之发生化学反应来改变EBA的热降解行为，提高在高温下的热稳定性，降低EBA的热降解速率，促进高温下成炭在凝缩相中发挥阻燃作用。此外，CaCO3与EBA在热降解过程中形成隔热、隔氧的多孔泡沫膨胀结构，可进一步加强阻燃效果。     

Structures and tribological performances of PEEK (poly-ether-ether-ketone)-based coatings designed for tribological application

Driven by economical and ecological reasons, thermoplastic-based coatings become a potential solution for anti-wear purpose. Two coating design concepts, flame spraying and printing PEEK (poly-ether-ether-ketone)-based coatings on Al substrate, were introduced in this paper. An amorphous PEEK coating was obtained by these two techniques. After being annealed, the coating presents a semi-crystalline structure. The friction and wear behaviors of PEEK-based coatings were investigated by means of ball-on-disc tests. The results show that PEEK coatings exhibit an excellent tribological performance with a relatively low coefficient of friction and wear rate. The semi-crystalline PEEK coating exhibits a lower friction coefficient and wear rate than the amorphous one. The additions of micron-sized particles such as SiC and graphite in PEEK coating can improve significantly the coating wear resistance.     

A visual study on flame behavior in tone-excited non-premixed jet flames

A visualization study on the effect of forcing amplitude in tone-excited jet diffusion flames has been conducted. Visualization techniques are employed using optical schemes, which are a light scattering photography. Flame stability curve is attained according to Reynolds number and forcing amplitude at a fuel tube resonant frequency. Flame behavior is globally grouped into two from attached flame to blown-out flame according to forcing amplitude; one sticks the tradition flame behavior which has been observed in general jet diffusion flames and the other shows a variety of flame modes such as the flame of a feeble forcing amplitude where traditionally well-organized vortex motion evolves, a fat flame, an elongated flame, and an in-burning flame. Particular attention is focused on an elongation flame, which is associated with a turnabout phenomenon of vortex motion, and on a reversal of the direction of vortex roll-up. It is found that the flame length with forcing amplitude is the direct outcome of the evolution process of the formed inner flow structure. Especially the negative part of the acoustic cycle under the influence of a strong positive pressure gradient causes the shapes of the fuel stem and fuel branch part and even the direction of vortex roll-up to dramatically change.     

建筑塑料的阻燃和抑烟

建筑塑料是化学建材的重要组成部分，人们关注建筑塑料的阻燃和抑烟问题。本文论述建筑塑料的燃烧过程、阻燃机理、成烟机理，提出了阻燃和抑烟的技术措施。     

Ag-ZnO catalysts for UV-photodegradation of methylene blue

High surface area Ag-ZnO catalysts have been made by flame spray pyrolysis (FSP) and characterized by X-ray diffraction (XRD), nitrogen adsorption, UV–vis spectroscopy and electron microscopy (SEM and transmission electron microscopy (TEM)) combined with energy dispersive X-ray spectroscopy (EDXS) for elemental mapping. Silver metal clusters deposited directly on ZnO nanocrystals were obtained from this process. The Ag loading (1–5 at.%) controlled the Ag cluster size from 5 to 25 nm but did not influence the ZnO crystal size. Photodegradation of 10 ppm methylene blue (MB) solution was used to evaluate the performance of these FSP-made Ag-ZnO and was compared to wet-made Ag-ZnO and reference titania photocatalysts. The rate of photodegradation was optimal for Ag loading around 3 at.%. The best photocatalytic performance was exhibited by flame-made Ag-ZnO produced at the longest high-temperature residence times having high crystallinity as determined by XRD and UV–vis.