Analysis of Fluorine Coating in Rubber ＆ Plastic Mold Surface

The article briefly introduced the influence factors of polymer product mold failure; noted that the effect of surface protecting of the mold was better than improving the surface hardness. Pointed out the release agents had a few shortcomings like single function so could not meet the development of modern industry after the release agent usage analysis. Analyzed three fluorine coatings which had obvious advantages： solvent-based, water-based and powder type. Its release mechanism was named as self- layering technology; fluorine coating not only enabled mold to have a smooth release at a complex surface, but itself had a good corrosion resistance, so the environmental protection composite coating is the future trend of industrial surface protection.     

钛基多元大孔材料光催化降解有机废水

TiO2由于光催化活性高、价格低廉、无毒等特点受到人们广泛关注。人们将形状不规则粉体TiO2制备成纳米大孔空心球等形状,以提高催化剂的悬浮性能和回收性能。同时,为了进一步提高TiO2对有机废水的光催化降解性能,对TiO2进行了掺杂改性的研究。文章主要介绍了掺杂改性大孔TiO2在光催化降解有机废水中的研究。     

一种延期精度高的工业雷管用点火药

文章主要介绍一种延期精度高的工业雷管用点火药的设计研究,并与国内普遍使用的工业雷管用点火药进行了比较,设计主要包括提高发火可靠性、提高抗水性能、装配等关键技术的解决方法,从而提高雷管在爆破工程中的延期精度,并降低爆破成本。符合《民用爆炸物品行业技术进步的指导意见》(工信部安[2010]227号)精神的要求。     

Kinetics study of living microemulsion polymerization mediated by reversible addition-fragmentation chain transfer

The present work focuses on the development of functional polyurethane hybrids through the incorporation of surface modified TiO₂ nanoparticles. For improving the nano-particle dispersion and increasing possible interactions between nano-particles and polyurethane matrix, the surface of the nano-particles was modified with 1,3,5-triazine core silane coupling agent. The surface modification of nanoparticles was confirmed by FESEM, FT-IR and Raman spectroscopic techniques. The functionalized nanoparticles were then inscribed in 0, 1 and 2 weight percentages into polyurethane matrix. The as prepared composite coatings were investigated for various anti-microbial, thermo-mechanical and anticorrosive properties. The tensile strength of polyurethane was improved by 300 % upon addition of 2 wt% of modified TiO₂ nanoparticles as compared to neat polyurethane. Fog test and electrochemical polarization studies suggest that the corrosion resistance increases with increase of the modified TiO₂ content in the coating formulation. The composite coatings also have good resistance towards various bacterial and fungal stains as compared to the pure polyurethanes. The coatings substantially gain hydrophilic nature symbiotically with TiO₂ content suggesting its potential application as self-cleanable material.     

Properties and carbonization behavior of asphalt modified with the THF-soluble fraction of a coal liquefaction residue

This study focuses on the effects of the tetrahydrofuran-soluble fraction of direct coal liquefaction residue as a modifier to modify asphalt with formaldehyde. The properties and carbonization behavior of matrix asphalt and the modified asphalts were studied. The results indicate that the ductility properties of modified asphalts have been effectively improved. The morphology of modified asphalts without the addition of formaldehyde is a set of uniform distribution point, and it is converted from linear distribution to clustered distribution observed in fluorescence microscope images with the increase of the adding amount of formaldehyde.