煤岩配煤技术的发展与现状

煤岩学在炼焦配煤技术上的应用,使炼焦配煤手段更有效,使焦炭质量预测在生产上应用成为可能,为定性的经验配煤技术跃变到定量的科学配煤技术创造了条件。夏皮洛煤岩配煤技术是目前较好的配煤方法,其相关系数可达0.93;国内许多学者在煤岩配煤方面也做了大量研究工作,有些相关系数达0.98。目前虽然各种方法存在一定局限性,但随着计算机和图像处理技术的发展,煤岩学在指导配煤技术方面将有新的突破。     

PP/PVC/PP-g-(St-co-MMA)的形态结构

以苯乙烯一甲基丙烯酸甲酯共聚物接枝聚丙烯[PP—g-（St—co—MMA）]为相容剂，利用扫描电子显微镜（SEM）和x射线能谱仪（EDS）对PP／PVC／PP—g-（St—co-MMA）的形态结构进行了研究。由x射线能谱微区分析得到了共混物中氯元素面分布图，对氯元素面分布进行了粒径统计。结果表明，在PP／PVC中加入PP-g-（St—co—MMA）相容剂，共混物亚微观相形态结构发生了变化。PP—g-（St—co—MMA）能够明显降低PP／PVC共混物中PVC分散相的分散尺寸，提高共混物两相之间的相容性。改变相容剂的用量和共混物的组成，都对体系的形态结构产生影响。     

MTBE辛烷值测试法的探讨

MTBE作为调合生产高标号无铅汽油的重要的高辛烷值组分油，准确测试其辛烷值在汽油调和生产中具有重要的意义。初步探讨了MTBE研究法辛烷值的测试方法，尝试了用甲苯标准燃料做参比燃料直接测定其净辛烷值，同时也测定了MTBE的混配辛烷值，通过MTBE辛烷值的测试，了解了MTBE的调和效应，确认了在石油二厂无铅汽油调和生产中对催化汽油的MTBE的真实辛烷值约为108／RON，指导了车用无铅汽油的调和生产。     

Polar and Non-Polar Solvent Permeation Resistance of Blow-Molded Bottles of Polyethylene/Blends of Modified Polyamide and Polyamide 6 Clay Nanocomposite

Investigations on white spirit and acetone permeation resistance of modified polyamide and nylon 6 clay (MPANYC) blends and their corresponding polyethylene/MPANYC bottles were reported in this study. The white spirit and acetone permeation resistance of MPANYC sheets improve consistently with increasing NYC contents present in MPANYC resins after blending nylon 6 clay (NYC) in modified polyamide (MPA) resins. However, the order of barrier improvement of the PE/MPANYC and PE/NYC bottle specimens is not corresponding to the order of barrier improvement of the MPANYC and/or NYC barrier resins added in PE. The blow-molded PE/NYC bottle specimen exhibits similarly worse white spirit and acetone solvent permeation resistance as the PE bottle specimen, wherein no clearly formed NYC laminas but only dispersed NYC droplets or agglomerates were found on the fracture surfaces of the PE/NYC bottles. However, after blending optimum compositions of MPANYC in PE, the PE/MPANYC bottles with demarcated MPANYC laminas exhibit significantly better white spirit and acetone permeation resistance than the PE/MPA bottle, wherein the white spirit and acetone permeation rates of the PE/MPA₈NYC₁ bottle are about 1.3 and 1.4 times slower than those of the PE/MPA bottle, respectively. In order to understand these interesting barrier properties of PE/MPANYC and PE/NYC bottles, rheological, thermal, wide angle X-ray diffraction and morphological properties of the base MPANYC and NYC resins and their corresponding morphology present in the blow-molded bottles were investigated.     

Effect of the matrix crystallinity on the percolation threshold and dielectric behavior in percolative composites

Through the use of polyethylenes with different crystallinities as matrices, the effects of the matrix crystallinity on the percolation threshold and dielectric behavior of percolative composites have been investigated. The results suggest that the percolation threshold is negatively related to the matrix crystallinity, whereas the enhancement of the dielectric constant is positively related to the matrix crystallinity. A two‐dimensional diagram is proposed to illustrate such relationships. In addition, it has been found that the insulator–conductor transition is much flatter in low‐crystallinity‐matrix‐based composites, and this may be favorable for preparing threshold composites with a high dielectric constant and a low loss tangent. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007     

复合型热塑性工程塑料的进展

对复合型热塑性工程塑料制造技术、特性、应用情况和发展趋势进行了较全面的评述，对发展我国工程塑料产业提出了若干建议。     

动态全硫化共混型热塑性弹性体的研究进展

阐述了动态全硫化共混型热塑性弹性体（TPV）的发展历史，微观形态结构及其形成机理，制备技术，主要的品种及其加工和应用。     

硫铁矿沸腾炉掺烧含硫化氢酸性气体的研究

对合成氨装置排出的酸性气体掺入硫铁矿在沸腾炉内燃烧进行了试验研究，酸性气体φ（H2S）约31．8％，φ（CO2）约68％，掺烧试验结果表明，在正常的操作条件下，硫化氢燃烧生成二氧化硫的反应相当迅速和完全，通过调节投矿量沸腾炉可以适应硫化氢气体浓度和流量的变化，生产出符合硫酸生产的原料气，因此在硫铁矿中掺烧含硫化氢的酸性气体是可行的，建议在工业生产中，由沸腾炉的扩大层加入酸性气体，这样可防止泄漏，避免出气孔堵塞，并且可通过调节二次风量控制硫化氢气体的燃烧。     

甲基乙烯基硅橡胶并用体系研究

并用两种乙烯基含量不同的甲基乙烯基硅橡胶，添加适量含氢硅油，同时采用过氧化物和铂催化加成这两种硫化方式。可以得到高撕裂乙烯基硅橡胶。结果表明，当乙烯基质量分数为0．09％和0．13％的生胶并用比为50／50时，其撕裂强度比单独使用两种生胶时分别提高了46．9％和21．7％；两种硫化体系并用时，性能有了显著提高，超过了单独使用一种硫化方式的性能。     

丙烯酸酯乳液的改性研究

制备了丙烯酸酯乳液,探讨了丙烯酸、N-羟甲基丙烯酰胺、二乙烯基苯、丙烯腈和三聚氰胺等不同改性剂对乳液性能的影响,在此基础上通过互穿网络聚合、化学共聚及物理共混等方法对乳液的性能进行了改性研究。