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阴离子聚合反应中的极性调节剂 被引量:7
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作者 赵宝忠 刘慧明 +1 位作者 顾明初 李杨 《弹性体》 CAS 2001年第4期44-48,共5页
论述了阴离子聚合反应中所用的各类微观结构极性调节剂以及其发展方向 ,指出调节剂向高效、适于高温下使用方向发展 ,而从结构上是从对称结构向不对称结构方向发展。
关键词 阴离子聚合反应 调节剂 极性调节剂 微观结构 分类
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微波连续硫化海绵橡胶密封条的研制 被引量:8
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作者 周淑杰 王富山 《辽宁化工》 CAS 2001年第4期149-150,共2页
介绍了微波连续硫化海绵密封条的特点 ,以及海绵密封条胶料配方的设计、口型设计、生产工艺路线和工艺条件的确定。
关键词 胶料 配方 三元乙丙橡胶 极性添加剂 口型片 工艺 微波连续化 海绵橡胶密封条
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Tribological performance of tributylmethylammonium bis(trifluoromethylsulfonyl)amide as neat lubricant and as an additive in a polar oil 被引量:3
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作者 Rubén GONZáLEZ Diego RAMOS +4 位作者 David BLANCO Alfonso FERNáNDEZ-GONZáLEZ Jose L.VIESCA Mark HADFIELD Antolin HERNáNDEZ BATTEZ 《Friction》 SCIE CSCD 2019年第3期282-288,共7页
The ionic liquid(IL) tributylmethylammonium bis(trifluoromethylsulfonyl)amide([N4441][NTf2]) was used as neat lubricant and as an additive(1.5 wt%) in a polar oil to study its friction and wear reducing properties.Tri... The ionic liquid(IL) tributylmethylammonium bis(trifluoromethylsulfonyl)amide([N4441][NTf2]) was used as neat lubricant and as an additive(1.5 wt%) in a polar oil to study its friction and wear reducing properties.Tribological tests were completed for 90 minutes at room temperature and 100 °C in a reciprocating configuration at loads of 30 and 70 N,10 Hz-frequency,and 4 mm stroke length.Wear volume was measured by confocal microscopy and the surface-IL interaction determined by XPS.The main findings were that neat IL showed the best tribological behavior;the IL-containing mixture behaved similar to the base oil regarding friction,however outperformed the antiwear behavior of the base oil under higher temperature;surface-IL chemical interaction was found mainly at 100 °C. 展开更多
关键词 ionic liquid additive friction wear polar OIL
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Polar Vortex Response to Pacific Ocean Warming and Its Additive Nonlinearity with the Indian Ocean 被引量:1
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作者 LI Shuanglin 《Atmospheric and Oceanic Science Letters》 2010年第6期303-307,共5页
A previous modeling study about Pacific Ocean warming derived polar vortex response signals, by subtracting those in the Indian Ocean warming experiments from those in the Indo-Pacific. This approach questions the res... A previous modeling study about Pacific Ocean warming derived polar vortex response signals, by subtracting those in the Indian Ocean warming experiments from those in the Indo-Pacific. This approach questions the resemblance of such an indirectly derived response to one directly forced by Pacific Ocean warming. This is relevant to the additive nonlinearity of atmospheric responses to separated Indian and Pacific Ocean forcing. In the present study, an additional set of ensemble experiments are performed by prescribing isolated SST forcing in the tropical Pacific Ocean to address this issue. The results suggest a qualitative resemblance between responses in the derived and additional experiments. Thus, previous findings about the impact of Indian and Pacific Ocean wanning are robust. This study has important implications for future climate change projections, considering the non-unanimous warming rates in tropical oceans in the 21st century. Nevertheless, a comparison of present direct-forced experiments with previous indirect-forced experiments suggests a significant additive nonlinearity between the Indian and Pacific Ocean warmings. Further diagnosis suggests that the nonlinearity may originate from the thermodynamic processes over the tropics. 展开更多
关键词 tropical Pacific Ocean warming northern and southern polar vortex atmospheric general circulation model additive nonlinearity
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极性添加剂存在下铝-镍催化体系的苯乙烯-异戊二烯-丁二烯共聚物的氢化反应
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作者 孙强 李杨 +3 位作者 李嵬 张春庆 李战胜 王玉荣 《合成橡胶工业》 CAS CSCD 2011年第5期352-357,共6页
采用负离子聚合法合成苯乙烯-异戊二烯-丁二烯三元共聚物(SIBR),并对其结构进行了表征;研究了结构调节剂N,N,N',N'-四甲基乙二胺(TMEDA)、二乙二醇二甲醚(2 G)和四氢呋喃(THF)作外加添加剂时,对三异丁基铝(简称Al)/环烷酸镍(简... 采用负离子聚合法合成苯乙烯-异戊二烯-丁二烯三元共聚物(SIBR),并对其结构进行了表征;研究了结构调节剂N,N,N',N'-四甲基乙二胺(TMEDA)、二乙二醇二甲醚(2 G)和四氢呋喃(THF)作外加添加剂时,对三异丁基铝(简称Al)/环烷酸镍(简称Ni)体系(Al与Ni的摩尔比为5)催化SIBR氢化反应的影响。结果表明,在50℃,苯乙烯质量分数为25%、异戊二烯和丁二烯质量分数为75%(二者质量比为1/1),TMEDA/n-BuLi(摩尔比)为1.5的条件下,可合成相对分子质量在10×104左右、多分数指数小于1.10的SIBR;TMEDA、2 G或THF极性添加剂的加入可使SIBR的氢化反应更加温和、加氢度更能有效调控;在所研究的添加剂用量范围内,3种添加剂对SIBR加氢度的影响程度由大到小依次为TMEDA、2 G、THF。 展开更多
关键词 负离子聚合 苯乙烯-异戊二烯-丁二烯三元共聚物 三异丁基铝 环烷酸镍 极性添加剂 氢化反应
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切削液在金属切削工艺中的作用 被引量:1
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作者 宋鸿仪 《新疆工学院学报》 1994年第3期211-216,共6页
本文介绍切削液的润滑机理和作用、分类;常用切削液的选用与评价;使用浓度;切削液的变质机理和更换周期,最后介绍几种较新的切削液(包括添加剂)及其切削效果.
关键词 油性添加剂 润滑油膜 金属切削 切削液
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Polar码在加性高斯白噪声信道下的性能分析 被引量:3
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作者 李晓磊 石旭 +1 位作者 周林 贺玉成 《中国科技论文》 CAS 北大核心 2019年第3期239-242,共4页
在加性高斯白噪声信道下,针对3种不同的Polar码译码算法进行性能研究。首先,阐述了Polar码的编码原理。然后,介绍了逐次消除(successive cancellation,SC)译码算法、逐次消除列表(successive cancellation list,SCL)译码算法和循环冗余... 在加性高斯白噪声信道下,针对3种不同的Polar码译码算法进行性能研究。首先,阐述了Polar码的编码原理。然后,介绍了逐次消除(successive cancellation,SC)译码算法、逐次消除列表(successive cancellation list,SCL)译码算法和循环冗余校验辅助的逐次消除列表(cyclic redundancy check assisted successive cancellation list,CA-SCL)译码算法。最后,仿真对比结果表明Polar码长越长,性能越好。当码长为有限长时,Polar码在SC译码算法中的性能并不理想。采用SCL和CA-SCL译码算法,能使Polar码具有更佳的性能。 展开更多
关键词 5G polar 加性高斯白噪声信道 译码算法
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