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

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.     

聚丙烯酰胺生产技术进展

聚丙烯酰胺(PAM)在许多领域均得到广泛的应用,它的生产技术一直是人们研究的重点.为此,综述了PAM的主要生产技术,包括水溶液聚合法、反相乳液聚合法、反相微乳液聚合法、悬浮聚合法、沉淀聚合法、辐射聚合法和泡沫聚合法,并对各种方法进行分析和评价,为以后PAM的扩大生产提供了充分的参考和依据.     

专利信息 无机化工

一种缓释氮肥组合物及其制备方法公开号 CN 1321623A 公开日 2001.11.14申请人 中国石油化工集团公司摘要本发明涉及一种缓释氮肥,是将熔融的氮肥用油相,乳化剂及助乳剂包覆成数微米的油包氮肥,水溶性氮肥是尿素、硝酸铵、硝酸钠、硝酸钙的一种或数种所组成,油相是石蜡、微晶蜡的一种或混合物,乳化剂是HLB值为3-6的油包水型(w/o)乳化剂的一种或多种的混合物及助乳剂。该缓释氮肥在水中可以缓慢溶解,具有抗水性强、缓释期长、养分释放均匀、价格低廉等特点。     

抗高温水包柴油乳化钻井液室内实验研究

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.     

汽车工业滤纸浸渍乳液的研制

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.     

椰子油植脂末制备技术研究

以精炼椰子油为芯材,麦芽糊精和酪蛋白酸钠为复合壁材,单硬脂酸甘油酯和蔗糖酯为复合乳化剂,采用喷雾干燥法制备椰子油植脂末,并通过单因素试验和正交试验确定了最佳的制备工艺条件。在复合乳化剂添加量为1.5%(单甘脂∶蔗糖酯=1∶4)、壁材∶芯材=1.5∶1、乳化温度为70℃、均质压力30 MPa、喷雾干燥进风温度为190℃的条件下,可制得产品含油率为33.6%、表面含油率为1.85%、包埋率为98.3%的植脂末。     

技术需求与难题求解

寻求高分子化工技术 四川省蓬溪县顺达利聚合物有限公司寻求以下高分子化工技术: (1)阳离子单体(SMC、DMC)与丙烯酰胺(AM)共聚物乳液的生产工艺条件及配方。 (2)分子量大于1800万的聚丙烯酰胺的聚合配方及工艺条件。技术要求:该配方(均聚前水解,后水解,AM、AA共     

SBS/CPE共混体系研究

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.     

国内外丁腈橡胶生产和消费现状

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.     

核桃蛋白饮料稳定剂的优化

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。     

Public Financial Expenditure——A Reflection of the Livelihood Improvement

In recent years.China's public finance put social construction high on the agenda and attaches more importance on livelihood insurance and improvement.The 2003-2007 public financial expenditure reflects a fact that the government isputting more emphasis on livelihood andissues concerning the people.     

Voices from the MPC and CPPCC

"Crucial for economic growth.energy utilization has its role in all economic sectors and every aspect of people's daily life.Now we are in dire need of a new profession,namely energy manager.We not only need to have passion and responsibility,but also a scientific approach to conserve energy and cut emissions.APpropriate legislation should be in place.and a special profession should be introduced to ensure the implementation of these laws and regulations."     

Slowdown Trade Surplus Growth

According to Ma Kai＇s economic planning report submitted to the NPC session on March 5th,（Ma Kai is the Minister in charge of the National Development and Reform Commission）,the government has listed the slowdown in trade surplus growth and the steady expansion of external investment as major tasks for 2008.     

Ouyang Riping： A Hero Besides Entrepreneur

A bout fifty years ago. a baby＇s cry broke the sky of quietness, in a small and beautiful town of Hunan province, which surroundcd by green hills and clear water. Though his .birth brought his family great happiness and hope just as any new life, nobody knew that the little boy would get great achievement when he grow up. even start his business oversea, and earn international honor. Let＇s share with you the entrepreneur Ouyang Riping＇s story, which may insights thcsc people who want to succeed and complete oneself in favorite condition or adversity rather leave things to so-called fate.     

Belarus, A Chinese Fort in Europe

＂In recent years, we＇ve found increasing interest from Chinese investors in the Belarus economy. Please let China know, Belarus is always ready to be a true friend to China. We have built a fort in Europe for China,＂ the President of Belarus, Alexander Lukashenko told Zhou Xiaochuan, President of the Bank of China, during his visit to the capital of Minsk, on January 8th, he expressed his high praise and firm confidence in the development of Sino-Belarusian relations.     

What＇s Behind Spring Festival？

Similar to what the Christmas Day means for the westerners,the Spring Festival is the most important celebration for Chinese people.This big event according to Chinese traditional lunar calendar relaxes and pleases the whole country as the happiest gathering time of the year.National-wide crusade for going back home,too-difficult-to-get train tickets,generous family-going-out shopping,Miaohui laundering,New Year Eve reunion dinner,visiting friends and relatives,watching annual TV gala......each piece of clue reminds us of the smell of Chinese Spring Festival.     

KEY WDRDS for Foreign Investment in China

FDI(Foreign Direct Investment),a component of a country's national financlal accounts,is investment of foreign assets into domestic structures,equipment,and organizations.It does not include foreign investment into the stock markets,concession and subcontract.FDI iS thought to be more useful to a country than investments in the equity of its companies because equity investments are potentially "hot money"which can leave at the first sign of trouble,whereas FDI is durable and generally useful whether things go well or badly.     

Brown＇s Blossom in Britain-China

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.     

Challenge and Opportunity Go Hand in Hand——What Global Economic Agitation Brings to the China's Economy?

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.     

Consumption, New Protagonist in 2007 GDP

Not long ago, the National Bureau of Statistics released its 2007 Macro Economy Index. Social consumption retail sales reached RMB 8.9 billion, increased by 16.8 percent over the previous year, or 3.1 percentage points higher; the whole investment in social fixed assets was valued RMB 13.7 billion, a year-on-year increase of 24.8 percent, that is 0.9 percentage points higher; and trade surplus amounted to RMB 24.7 billion, rising by 47.7 percent compared with the same period last year, 26.3 percentage points falling over the increasing speed last year. According to preliminary estimates, GDP for the year was RMB 24.67 trillion, up by 11.4 percent from the previous year,