超细碳酸钙/粉末丁苯橡胶的制备及在PVC中的应用

本文用超细碳酸钙（CaCO3）作为隔离剂和不同的包覆剂,通过凝聚法制备粉末丁苯橡胶（PBSR）.当超细CaCO3与PBSR质量比为50/100,包覆剂Coron树脂结构组成中马来酸酐和苯乙烯质量比为7/3,用量占PSBR质量的9%时,所得的超细CaCO3/PSBR粒径小于1mm,比未加超细CaCO3的PSBR小一倍左右.当PSBR/PVC的质量比为15/100,CaCO3/PSBR与PVC混合制得复合材料的拉伸强度比PSBR与PVC制得复合材料提高了约15%,缺口冲击强度提高了60%左右.     

C5石油树脂在橡胶中应用的探讨

将Ｃ５石油树脂应用于丁苯橡胶（ＳＢＲ）和天然橡胶（ＮＲ）／顺丁橡胶（ＢＲ）并用胶中进行了全面性能试验。结果表明：国产和进口树脂的各项性能基本一致；适量加入树脂对胶料物理性能无明显影响；Ｃ５树脂对胶料具有明显增粘效果，是一种值得大力推广的产品。     

齐鲁石化充油橡胶的主要品种及性能

介绍了中国石化齐鲁石油化工股份有限公司橡胶厂近年来开发的充油SBR和充油BR的品种及性能并与国外同类产品进行了对比。指出SBR1712 ,SBR1778,SBR172 1和BR90 73的基本性能与国外产品相当 ,而且部分性能稍优     

新型气化炉煤气洗涤废水生物脱氮的研究

在实验室,采用SBR生化反应器,分别研究了经空气吹脱预处理和未经预处理的新型气化炉煤气洗涤废水经驯化建立的生态系统脱除氨态氮和COD以及脱氮模式的区别,得出以下结论:新型气化炉煤气洗涤废水可采用短程亚硝化型硝化形式直接进行生化处理。     

超薄耐热打孔输送带的研制

介绍高速晒图机用超薄耐热打孔输送带的结构与配方设计、生产工艺及产品性能.超薄耐热打孔输送带为3层结构,上下两层为棉帆布层,中间为粘合层,粘合层厚度约为0.2 mm,采用SBR胶料.经试用表明,本工作研制的输送带性能符合使用要求,可以替代进口产品,且具有供货周期短、价格低廉的优势.     

Effect of low molecular weight polybutadiene as processing aid on properties of silica‐filled styrene–butadiene rubber compounds

Because silica has strong filler–filler interactions, a silica‐filled rubber compound shows a poor filler dispersion compared to a carbon black‐filled one. Improvement of the filler dispersion in silica‐filled styrene–butadiene rubber (SBR) compounds was studied using low molecular weight polybutadiene (liquid PBD) with the high content of 1,2‐unit. By adding the liquid PBD to the silica‐filled SBR compound, the filler dispersion and flow property are improved. The cure time and cure rate become faster as the 1,2‐unit content of the liquid PBD increases for the compounds containing the liquid PBD. The crosslink density increases linearly with increase in the 1,2‐unit content of the liquid PBD. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3135–3140, 2003     

ENR的制备及其与SBR的相容性研究

采用原位氧化法对天然胶乳进行环氧化改性，考察环氧化反应的影响因素，制备环氧化度为15％～75％的ENR，并通过傅立叶转换红外光谱、核磁共振谱和热分析仪对其进行分析和表征。结果表明，天然胶乳中固形物质量分数为0．3、表面活性剂质量为干胶质量的1％、反应温度为30℃时，天然胶乳的环氧化反应进行得较为顺利；随着环氧化度的增大，ENR的起始分解温度呈上升趋势；ENR在环氧化度不大于35．5％时与SBR相容性较好，随着环氧化度增大，相容性变差。     

轮胎胎面胶耐磨性能研究

选择NR ,SBR和BR以及炭黑N3 3 9,N2 3 4,N2 2 0和N110等构成的体系 ,对胎面胶在不同压力、磨耗角度及磨耗里程下的耐磨性能进行了研究。结果表明 ,当NR/BR并用比为 70 / 3 0、炭黑N2 3 4/N110并用比为 40 / 12时 ,胎面胶的耐磨性能最佳。     

Denitrifying phosphorous removal in anaerobic/anoxic SBR system with different startup operation mode

To achieve stable and efficient nitrogen and phosphorus removal and to investigate the characteristics of the A/A SBR enriched with denitrifying phosphorus removal bacteria(DPB),the whole course of startup was studied with two reactors operated in different mode.The reactor I was operated under anaerobic/settling/anoxic/settling mode,and the reactor II was operated under anaerobic/anoxic/settling mode.Differences between the two reactors in removal efficiency of COD,nitrogen and phosphorus were examined.The results indicated that efficient performance could be achieved in both reactors with different startup operation mode,while the phosphorus removal efficiency was improved sooner in reactor I than in reactor II,which suggested that reactor I would supply a more favorable condition for DPB proliferation.Meanwhile,it was observed that the amount of organic substrates consumption had a linear correlation to that of phosphorus release in anaerobic phase when DPB was accumulated in the A/A SBR denitrifying phosphorus removal system.     

充水比对UniFed SBR 工艺脱氮的影响

为了考察充水比对新型UniFed SBR工艺脱氮的影响,试验采用充水比分别为25%和42%的2个并行的UniFed SBR反应器,并以实际生活污水为处理对象,通过比较在6组相同的进水ρ(C)/ρ(N)比,TN在2个充水比条件下1个完整周期中的降解规律及出水TN质量浓度,分析了充水比对进水/排水阶段和曝气阶段TN去除的影响.试验结果表明,UniFed SBR工艺在任意一个充水比下运行时,都存在一个与之相对应的进水/排水阶段最大脱氮率η_(1max),η_(1max)只与充水比有关,而与进水ρ(C)/ρ(N)比无关,且在进水碳源充足时,充水比越大,η_(1max)越低;在相同进水ρ(C)/ρ(N)比时,充水比越大,曝气阶段由SND产生的脱氮率η_2越高.由于进水/排水阶段对UniFed SBR工艺TN的去除贡献更大,因此采用较小的充水比,更有利于工艺整体对TN的去除.