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甲基丙烯酰氧乙基三甲基氯化铵和丙烯酰胺的反相乳液聚合 总被引:1,自引:0,他引:1
以甲基丙烯酰氧乙基三甲基氯化铵(DMC)和丙烯酰胺(AM)为原料,通过反相乳液聚合技术,合成阳离子高分子聚合物.讨论了引发剂种类、乳化剂种类、单体浓度及配比、油水体积比等因素对共聚产物的特性黏度和体系稳定性能的影响,确定了最佳反应条件.在单体物质的量比为6∶3,油水体积比为1.3∶1,引发剂为氧化-还原引发剂或高效水溶性引发剂的条件下,得到产品.并对产物进行了絮凝实验以及红外光谱分析. 相似文献
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本文参考近年来国内外学者的研究成果,使用非离子及阴离子表面活性剂,采用HLB值法筛选和复配方法得到稳定性良好的乳化剂,配制出了油水比为6:4的低密度水包油乳化钻井液.结果表明,该钻井液具有密度低、密度易调整、抗高温达180℃等特性. 相似文献
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汽车工业滤纸浸渍乳液的研制 总被引:2,自引:0,他引:2
作者介绍了一种汽车工业滤纸浸渍乳液的制备方法.以丙烯酸丁酯、苯乙烯、甲基丙烯酸、硅烷偶联剂和交联型功能单体为主要原料,采用单体预乳化乳液聚合工艺,合成了滤纸浸渍乳液.讨论了单体的选择及配比、硅烷偶联剂、乳化剂对乳液性能的影响.结果表明:软硬单体丙烯酸丁酯与苯乙烯的最佳配比为(0.35~0.47):1;硅烷偶联剂和乳化剂的最佳用量分别为总单体量的0.68%~0.93%、0.45%.制得的乳液粒径细腻、固含量高、黏度适中、稳定性好、综合性能优异. 相似文献
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氯化聚乙烯橡胶(CM或CPE)和苯乙烯-丁二烯-笨乙烯嵌段聚合物(SBS)共混体系为部分相容体系.本实验通过溶液法制备SBS-g-MAH接枝共聚物,用酸碱滴定法测定接枝率;同时用红外光谱对接枝产物进行了表征;再利用TG分析了接枝产物SBS-g-MAH的热稳定性;并对不同配比的CPE/SBS-g-MAH/SBS共混体系的物理力学性能进行测试.结果表明:接枝后SBS的热稳定性得到了提高,而且CPE/SBS-g-MAH/SBS三元共混体系的相容性明显强于CPE/SBS二元共混体系,说明SBS-g-MAH对SBS/CPE共混体系起到了一定的增容作用. 相似文献
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国内外丁腈橡胶生产和消费现状 总被引:1,自引:0,他引:1
丁腈橡胶(NBR)是由丙烯腈和丁二烯经乳液聚合制得的共聚物 具有极好的耐油性、卓越的耐磨性、耐溶剂性和耐热性,广泛地用于汽车、石油开采与炼制、航空、纺织、印刷等领域.丁腈橡胶是目前消耗量最大的特种橡胶之一.综述了国内外丁腈橡胶的生产及市场情况,对国内丁腈橡胶的市场发展趋势进行了分析,并预测在世界金融危机的影响下,国内丁腈橡胶需求增长将会放缓.此外,还对国内丁腈橡胶行业的发展提出了建议. 相似文献
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通过正交实验的结果确定了复合乳化稳定剂的配比:复合乳化剂0.15%(单甘酯0.03%与蔗糖酯0.12%)、黄原胶0.06%、CMC 0.15%、海藻酸钠0.10%、明胶0.15%,影响核桃蛋白饮料稳定性的因素主次顺序为:复合乳化剂黄原胶海藻酸钠CMC明胶。 相似文献
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《中国对外贸易(英文版)》2008,(5):50-51
The overall strategic relationship between U.K. and China is "better than ever", China- Britain relations have maintained good momentum, with increased high-level exchanges and the reinforcement of strategic mutual trust, with more room for growth in the future. 相似文献
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Guo Yan 《中国对外贸易(英文版)》2008,(5)
Domino effects of the global finance agitation As the origin of the subprime crisis,US financial institutions lost USS45 billion last year,accounted for over half of the total US,EU & Japan loss.Since January 15th,Chtigroup released its financial statement of the 4th quarter,showing a net deficit of USS9.83 billion,which marked the hisoric high of its quarterly deficit. 相似文献
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《中国对外贸易(英文版)》2008,(6):62-65
Among the Fortune 500 firms,more and more images from China emerge out.On the 2008 list,Sinosteel Corporation,a landmark group of China industries quietly squeezes into the candidate line.As the largest steel service & trade enterprise,its sales reached at RMB 111.24 billion,with a year-on-year increase of 83.03 percent,and the profit grew by 180.03 percent.On the Sinosteel 2008 Work Meeting,the president Huang Tianwen uttered,"In the coming year,we will work for US$20 billion sales,and look forward to getting a position in Fortune 500 firms for ourselves." 相似文献
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Zang Kejia 《中国对外贸易(英文版)》2008,(7):16-17
When the 103rd Canton Fair is approaching, an old friend of Canton Fair, Li Ying from Jiangsu prov-ince recollected his past five years' experiences to the grand trade meeting. Each year is special, with some unforgettable memories colored by the year. 相似文献
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Estaing, former French president, Valery Giscard d'Estaing attended Sino-French Economic Seminar held in Shanghai in early April and said that the world center has shifted from the west to the east with many European and US companies entering into Asia, and China has the ability to play an important role in the world stage. Estaing, naming himself"French Confucian", then said in Chinese that a cook-group includes 10 people in ancient Chinese soldier system and the cook is in charge of cooking for them. And people who belong to the same cook are actually "Partners". 相似文献
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《中国对外贸易(英文版)》2008,(5):12
The annual meeting of the World Economy Forum was held in Davos,a little town in Switzerland,on January 23rd to the 27th this year,with the theme"the Power fo Collaborative Innovation",over 2500 celebrates from ture political and cconomic circles of more than 80 countries and challengred logether to talk about the future of the global economy in 2008,A Forum for the problems and challenges that face whole world,some of the keywords which drew attention during the event were:the U.S.subprime mortgage crisis,soaring energy prices,the economic slowdown in the U.S.ermerging economic bodies,authority funds and the general unpredictable nature of the global economy. 相似文献
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"If you are considering to trade with companies in Japan or expanding your business to Japan we are ready to help from the very beginning."You will find this greeting at the first sight on the Chinese website of Japan External Trade Organization 《中国对外贸易(英文版)》2008,(10):16-17
If you are considering to trade with companies in Japan or expanding your .business to Japan, we are ready to help from the very beginning." You will find this greeting at the first sight on the Chinese website of Japan External Trade Organization (JETRO). JETRO has committed itself in delivering highly efficient and quality services to meet the demand of internal and external customs including Japanese companies, hence winning a good reputation in the international trade arena. In recent years, with its priority in advancing business cooperation in South and East Asia, JETRO has made great achievement in promoting trade between China and Japan. Therefore, China's Foreign Trade interviewed Mr. Yoichi Maine, Deputy Director General of JETRO BEIJING. 相似文献
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Guo Yan 《中国对外贸易(英文版)》2008,(12):62-63
Looking at the increasingly fierce competition in the world auto market. global automobile manufacturing industry, taking Europe, the U.S. and Japan as representatives, is gradually forming a new type of relationship, mutual cooperation between whole vehicle and parts manufacturers. We can clearly see that auto parts manufacturers have become independent from the whole vehicle manufacturing companies, which means that the former structure of auto industry has greatly changed, and a new relationship, 相似文献
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Liu Xinwen 《中国对外贸易(英文版)》2008,(7)
Last year,the volume of China's auto trade reached US$66.878 bil- lion,of which imports accounted for US$25.982 billion,a year-on- year increase of 24.45 percent;while ex- ports totaled US$40.896 billion,growing by 45.31 percent.The China Association of Automobile Manufacturers(CAAM) predicts that the number of autos sold in 2008 will break the 1 million barrier for the first time in history,representing an increase of about 20 percent. 相似文献
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Guo Yan 《中国对外贸易(英文版)》2008,(1):10-10
In the middle of last December, the key purchase contracts for coal used in power generation in 2008 were signed, reflecting a demand for more than 1.085 billion tons. It is important to note that the country's five biggest power producers, China Huaneng Group, China Guodian Corporation, China Power Investment Corporation, China Huadian Corporation and China Datang Corporation, had settled on the prices on their purchase contracts, and they are expected to consume 290 million tons of coal for generating electricity, 相似文献