抗菌陶瓷釉面砖的制备及其性能研究

通过在釉中引入磷酸银抗菌剂 ,研制了低温两次快烧抗菌陶瓷釉面砖。用正交实验法优选出抗菌釉面砖的坯体配方、釉料配方及烧成温度制度 ,研究了Ag3PO4及烧成温度对抗菌效果及白度的影响 ,探讨了银挥发量和Ag 在釉层中的径向分布与烧成温度的关系。结果表明 ,基釉中加入 2 %Ag3PO4及烧成温度为 10 5 0℃的抗菌釉面砖可获得较好的抗菌效果和釉面质量 ,抗菌釉面砖具有良好的广谱抗菌性和抗菌持久性     

纳米SiO2在高分子领域中的应用

介绍了纳米二氧化硅对高分子材料的改性机理及其在塑料，橡胶，纤维，涂料，粘合剂和密封胶等高分子领域中最新研究应用情况。     

积层多层板用UV油墨的合成研究

采用丙烯酸改性环氧树脂E－44的方法，合成了环氧丙烯酸酯预聚物，并将其用在UV光固化油墨的配方中。在树脂合成过程中，研究了反应温度，催化剂，阻聚剂等因素对合 产品的影响。通过L9(3^4)正交试验，得到了优化的工艺参数：反应温度为90℃，催化剂为N，N－二甲苯胺，用量1％；阻聚剂对苯二酚，用量0．5％，投料环氧树脂和丙烯酸的摩尔比为1：1．08。     

低等规聚丙烯的研制 Ⅳ.聚合催化剂的制备

以二乙氧基镁为载体的主要原料，采用三氯化铝使二乙氧基镁氯化制备载体，再采用四氯化钛进行载钛，得到一种丙烯聚合催化剂，并对其进行了表征。经流相本体法丙烯聚合评价实验表明，此催化剂的活性为30－60kg/g，全聚物在沸庚烷中不溶部分为13％－30％。并对影响催化剂活性和立体选择性的各种因素进行了讨论，给出并比较了催化剂小试、模试和中试的实验结果。     

高气速选择性分离氨碳混和气模拟实验

采用二级串联鼓泡吸收器对NH3／CO2摩尔比为2：1的混和气体进行高气速选择性吸收，获得氨的总吸收率为96．7％，二氧化碳的总吸收率为33．1％，二级吸收器出口气相CO2摩尔含量达90．9％，液相氨碳摩尔比为5．85。将此吸收液在加压下精馏分离氨，基本可以把吸收液中游离氨回收。分离游离氨后的溶液在常压下进行解吸，蒸馏塔出口液体含NH3和CO2量仅为0．014％和0．006％，解吸气回串联吸收器进行循环吸收分离。对预计工业分离过程进行物料和能量衡算，分离1kg液氨需1MPa的蒸汽约3.2kg。     

神经网络在聚合过程中的应用

介绍了神经网络在聚合反应过程中的建模，预测、优化，控制和故障诊断及模式识别方面的应用，讨论了其优点和局限性，并分析今后神经网络的发展趋势。     

PLA复合材料降解性能研究进展

概述了聚乳酸(PLA)的降解理论,重点综述了PLA复合材料水解和热降解的国内外研究进展,并展望了PLA复合材料降解研究的发展方向。     

Experimental investigation and stability analysis on dense-phase pneumatic conveying of coal and biomass at high pressure

Conveying characteristics and flow stability are very important for design and control of a conveying system at high pressure. The influences of operating parameters and material properties on conveying characteristics were investigated in an experimental test facility with a conveying pressure up to 4MPa. Wavelet transform and Shannon entropy analysis were applied to analyzing pressure drops through horizontal pipe in order to obtain the stability criterion. Results indicated that the mass flow rate of biomass decreased, while the mass flow rate of pulverized coal increased at first and then decreased with the increase in fluidization velocity. Solid loading ratios for four kinds of powders decreased with the increase in fluidization velocity. Conveying phase diagrams and pressure drops through different test sections of pulverized coal and biomass at high pressure were obtained and analyzed. The influences of coal category, fracture characteristics and particle size on conveying characteristics were determined.     

Crystallization behaviors and foaming properties of diatomite-filled polypropylene composites

The non-isothermal crystallization kinetics and foaming properties of polypropylene (PP) filled with various contents of diatomite were investigated. The results showed that the diatomite had strong effects on the PP crystallization kinetics, which significantly increased the crystallization temperature and reduced crystallite size. These were attributed to the nucleation effect of the diatomite particles and the complex interface properties between the PP chains and diatomite particles. Non-isothermal crystallization can be well described by the Mo’s method. The non-isothermal crystallization activation energy calculated by the Kissinger’s method increased with increased content of diatomite. The foamed PP composites, in particular, the PP composites filled with 10 wt% diatomite had better cell morphology ascribed to the facilitated crystallization and increased polymer melt strength compared with the foamed pure PP.     

丙烯酸酯低聚物的制备及其改性PUA乳液

以丙烯酸丁酯(BA)、乙酸乙烯酯(VAc)、丙烯酸羟乙酯(HEA)、丙烯酸(AA)等为主要原料合成了丙烯酸酯低聚物,以该低聚物为改性剂,制备了丙烯酸酯改性水性聚氨酯乳液(PUA)。考察了低聚物中单体组成、引发剂种类及用量、合成PUA时低聚物加入方式对PUA性能的影响。通过傅里叶变换红外光谱、偏光显微镜照片和热重曲线研究了乳液微观结构和耐热性能,通过气相色谱测定了单体残留量。结果表明:当低聚物中单体组成为BA,VAc,HEA,AA,所用引发剂为偶氮二异丁腈(用量为单体总质量的1.17%),将低聚物与异氰酸酯基单体同时加入反应时,可得到综合性能好、单体残留量极低的水性PUA,其初黏性可达13号球,持黏性为45 min,且乳液稳定。