强化单螺杆挤出机内层流混合的方法

综述了单螺杆挤出机内聚合物熔体层流混合机理的研究进展，对提高混合的措施进行了分析总结，指出了进一步强化混合效果的方法。     

Morphology of conducting polymeric coatings: quantitative comparison between theory and experiment

The density profile of electrosynthesized polymeric layers on carbon fibers is obtained from gravimetric and scanning electron microscopy (SEM) data. The coating density ρ is found to decrease with increasing radial distance, r, subject to the power law . Based on a modified diffusion-limited aggregation (DLA) model, it is shown that lattice Monte Carlo simulation of the coating process predicts the experimentally observed power law exponent.     

Graft Copolymerization of Acrylamide onto Oil Palm Empty Fruit Bunch (OPEFB) Fiber

Grafting of acrylamide (AAm) onto oil palm empty fruits bunch fiber using hydrogen peroxide as initiator and methyl acrylate as comonomer was investigated. The amount of comonomer needed to make grafting of acrylamide possible was determined. The percentage of poly(acrylamide) and the comonomer in the final graft copolymer was estimated by elemental analysis. Results obtained indicated that methyl acrylate facilitated the incorporation of acrylamide monomer onto OPEFB. The reactivity ratios for both monomers were determined by using Fineman–Ross plot. The effects of reaction temperature and period as well as amount of the initiator, solvent, monomer and comonomer on the percentage of grafting at fixed amount of comonomer (11 mmol) were studied. Maximum percentage of grafting was achieved when the amount of initiator and solvent 3.98×10⁻³ mol and 50 mL respectively. The optimum reaction temperature was 50 ^○C and the reaction period was 90 min. Highest percentage of grafting was 232% when 25.6 mmol of acrylamide was used under these optimum conditions. The presence of functional group in the grafted polymer is characterized by infrared spectroscopy and the surface morphology is observed by scanning electron microscopy. Thermoanalytic investigation on OPEFB and OPEFB-g-PAAM were carried out to evaluate the thermal stability and respective activation energy of the materials.     

中空纤维超滤膜去除乳酸钙中蛋白质的研究

发酵法联合生产乳酸-乳酸钙工艺中,分离出的乳酸钙产品含有蛋白质、还原糖、重金属等杂质,影响产品的品质。本实验研究了中空纤维膜对乳酸钙中蛋白质的去除,并分析了压差、温度、浓度及pH值等因素的影响。得到了较好的工艺操作条件为Δp=0.05MPa,Δ=30g/L,30°C,pH=4。进一步提出用多步超滤能提高蛋白质的去除率15%～27%。     

炭石墨制品抗冲击强度试验方法的研究

概述了炭石墨制品抗冲击强度试验方法的研究过程，并用误差估计理论论证了该方法的科学性和可行性。     

生物综合毒性监测技术进展与多源生物预警体系

为进一步推动生物综合毒性监测技术的应用,对发光菌、藻类、溞类和鱼类作为指示生物进行生物综合毒性测试的研究进展进行了总结,分析了4种指示生物在综合毒性测试中的优点与不足,发现了不同指示生物在检测范围、检测时间及检测限方面存在的明显差异。研究结果表明:相对于现实复杂的污染物构成现状,单一指示生物难以全面、高效、客观地检测评价污染物的毒性,需要将4种指示生物进行联合预警,充分发挥不同指示生物的优势,才能达到最佳的预警效果。在已有研究的基础上提出了多源生物联合预警技术体系,并在丹江口水源区对17种常见典型污染物进行了测试研究。测试结果表明,多源生物预警技术能显著提高预警效率。     

有机硅乳液稳定性的研究

以阳离子型乳液聚合为例，详细讨论了聚合反应因素及环境因素对环氧改性有机硅乳液稳定性的影响。结果表明：在聚合反应温度为65℃、催化剂的用量为总加料量的0．3％～0．5％、硅烷偶联剂的用量为D4质量的3％～5％、乳化剂用量为总加料量的10％、阳／非离子型乳化剂的质量比为1．5～1．8、D4与水的质量比为0．3～0．4条件下，制得的环氧改性有机硅乳液稳定性良好；采取急冷的方式中止聚合反应，并以醋酸中和至pH值为6～7，有利于环氧改性有机硅乳液稳定性的提高。     

用于光纤并带的UV固化胶粘剂性能的研究

研究了用于光纤带的紫外光固化胶粘剂的剥离性、柔韧性、拉伸强度和延伸率的影响因素。     

用磷石膏生产建筑材料的新进展

针对湿法磷酸副产的磷石膏在建筑材料中的应用及其国内外进展，介绍了用磷石膏制高强度砌块的中间试验流程，并指出在磷石膏中搀入其他材料，采用特殊复合工艺，可生产出新型功能性建筑材料，如石膏基导电材料和石膏基磁性材料等这不仅拓展了石膏的用途，又可获得巨大的经济效益。     

Residual strength of hybrid-fiber-reinforced high-strength concrete after exposure to high temperatures

Residual strengths of high-strength concrete (HSC) and hybrid-fiber-reinforced high-strength concrete (HFRHSC) after exposure to high temperatures were investigated in the paper. The results showed that normal HSC is prone to spalling after exposure to high temperatures, and its first spalling occurs when the temperature approaches 400 °C. For HSC reinforced by high melting point fibers, the first spalling occurs when the temperature reaches to approximately 800 °C, while there is no spalling during exposing to high temperatures for HSC reinforced by polypropylene (PP) fiber with a low melting point. Mixing high melting point fiber (i.e., carbon or steel fiber) with low melting point fiber (i.e., PP fiber) HSC greatly improves the properties of HSC after exposure to high temperatures.