脂肪醇聚氧乙烯醚磷酸酯的合成

阐述了以脂肪醇聚氧乙烯醚 ( AEO3)为起始剂 ,五氧化二磷为磷化剂 ,经直接酯化 ,水解制备脂肪醇聚氧乙烯醚磷酸酯。酯化反应:AEO3/P2 O5为 3.1 /1 ( mol/mol) ,温度为 60～70℃ ,时间为 6～ 7h;水解 :加水量为 4% ,温度为 60～ 70℃ ,时间为 2 h。酯化率大于 78% ;活性物质量分数大于 83% ;无机磷质量分数 <1 %。     

掺染料激光塑料的研制

制备了三种激光塑料样品,对其激光特性进行了测试,简要介绍激光塑料的应用前景。     

Facile preparation and cytocompatibility of poly(lactic acid)/poly(3‐hydroxybutyrate‐co‐4‐hydroxybutyrate) hybrid fibrous scaffolds

A fibrous scaffold is required to provide three‐dimensional (3D) cell growth microenvironments and appropriate synergistic cell guidance cues. In this study, porous scaffolds with different mass ratio of poly(lactic acid) to poly(3‐hydroxybutyrate‐co‐4‐hydroxybutyrate) (P(3HB‐co‐4HB)) for tissue engineering were prepared by a modified particle leaching method. The effect of the addition of P(3HB‐co‐4HB) on microstructural morphology, compression property, swelling behavior, and enzymatic degradation of hybrid scaffolds was systematically investigated. The results indicated that this method was simple but efficient to prepare highly interconnected biomimetic 3D hybrid scaffolds (PP50/50 and PP33/67) with fibrous pore walls. The cytocompatibility of hybrid scaffolds was evaluated by in vitro culture of mesenchymal stem cells. The cell‐cultured hybrid scaffolds presented a complete 3D porous structure, thus allowing cell proliferation on the surface and infiltration into the inner part of scaffolds. The obtained hybrid scaffolds with pore size ranging from 200 to 450 µm, over 90% porosity, adjustable biodegradability, and water‐uptake capability will be promising for cartilage tissue engineering applications. POLYM. ENG. SCI., 54:2902–2910, 2014. © 2014 Society of Plastics Engineers     

Novel‐modified kaolin for enhancing the mechanical and thermal properties of poly(vinyl chloride)

Novel surface‐modified kaolin with liquid‐like behavior was prepared. The characteristics of the solvent‐free kaolin fluid were evaluated by using Fourier transform infrared spectroscopy, WAXD, thermogravimetric analysis, and transmission electron microscopy. The polyvinyl chloride (PVC)/solvent‐free kaolin fluid composites were also fabricated via melt mixing. Owing to the novel surface modification, the hydrophilic kaolin surface grafted long organic chains, which made that the solvent‐free kaolin fluid could be well dispersed in PVC matrix and firmly integrated with the PVC matrix. The resulted composites exhibited better heat resistance and mechanical properties than neat PVC resins. POLYM. ENG. SCI., 2012. © 2012 Society of Plastics Engineers     

低温甲醇洗净化工艺技术浅析

介绍了低温甲醇洗净化工艺的技术原理、工艺流程及技术特点,并通过与其它净化工艺的技术指标进行比较,证明其是一种节能型的酸性气体净化工艺。     

CO2汽提法尿素生产工艺研究

介绍了CO2汽提尿素生产工艺的技术原理、工艺流程及技术特点,阐述了其技术进展,并与其它尿素工艺的技术指标进行了比较。结果表明,该法是目前极具竞争力的尿素生产技术。     

The effect of the addition of carbon nanotube fluids to a polymeric matrix to produce simultaneous reinforcement and plasticization

Carbon nanotube (CNT) fluids with liquid-like behavior were synthesized and incorporated into a polymeric matrix to investigate the processability and mechanical performance of the resulting composite, as well as the distribution of CNTs in the host material. We demonstrated that the simultaneous reinforcement and plasticization effect on the polymeric matrix by the novel multifunctional component should be ascribed to the soft organic coating and the unique flowability of such surface-functionalized CNTs. The solvent- and plasticizer-free nature along with the above-mentioned advantages provides a green and efficient route to fabricate high performance composite materials.     

PVC糊树脂质量的影响因素

介绍了氯乙烯乳液种子聚合特点和种子质量、初始乳化剂和反应过程中乳化剂加入量、干燥温度对乳液种子法PVC糊树脂质量的影响。     

Processing of alumina grinding media using scandia as a sintering aid

Wear resistance is one of the essential properties of grinding media. Good wear resistance is the quality guarantee of preparing high-purity ultrafine powder. This paper mainly studied the influence rule and enhanced mechanism of Sc₂O₃ on the wear resistance of Al₂O₃ ceramics. The relationship between Sc₂O₃ content and sintering properties, wear resistance, and microstructure of ceramics was studied. According to research findings, Sc₂O₃ could promote the densification of ceramics, improve the morphology of grain boundaries, enhance the binding force of grains, and increase the mechanical property of alumina grain.