化学英文论文网站有哪些好的论文
不知道，随便给你一个疏水缔合型聚合物P(AMTA)溶液性质的研究疏水缔合型水溶性聚合物是指在聚合物亲水性大分子链上带有少量疏水基团的一类水溶性聚合物。在聚合物水溶液中，疏水基团之间由于憎水作用而发生聚集，使大分子链产生分子内和分子间缔合。在临界缔合质量分数以上，形成分子间缔合为主的超分子结构，增大了流体力学体积，故具有较好的增黏性。在盐溶液中，由于小分子电解质的加入增加了溶液极性，使疏水缔合作用增强，表现出明显的抗盐性质。 疏水缔合型水溶性高分子很难合成，且不易表征，把疏水部分连接到水溶性聚合物链上，一般采用胶束共聚合或者使用具有表面活性的大单体进行共聚，胶束聚合需要在体系中加入大量的表面活性剂，这就增加了后处理过程的复杂性。利用表面大单体共聚合，需要事先合成大单体，这方面的技术也有相当大的难度。作者采用丙烯酸十四酯作为疏水单体，直接用沉淀聚合法制备疏水缔合型聚合物P(AM／TA)共聚物，从而使共聚反应及其产物的后处理过程较为简单易行。并用凯达尔定氮法表征共聚物的组成，研究共聚物的溶液性能和对苯丙乳液的增稠性。 1实验 1．1试剂 丙烯酰胺(AM)，质量分数不少于985％，根据文献提供的方法提纯；N，N-甲基甲酰胺(DMF)，分析纯；甲醇、氯化钠，化学纯；丙烯酸十四酯(TA)，实验室自制；苯丙乳液由福建省福州树脂有限公司提供。 1．2P(AM/TA)共聚物的合成 称取一定量的AM和TA单体，用DMF溶解，转入三颈瓶中，通氮除氧。升温至80℃，加入引发剂反应4h，过滤，产物用甲醇洗涤多次，以除去未反应的单体。40℃真空干燥至恒重。 1．3分析测试 凯达尔定氮法测定共聚物的组成。用乌氏黏度计测定共聚物溶液特性黏度[η]，测试温度为(30±O1)℃。聚合物溶液表观黏度用NDJ-I型旋转黏度计测定。 2结果与讨论 2．1共聚物稀溶液性质不同疏水基团摩尔分数的P(AM／TA)共聚物在蒸馏水和w(NaCl)=5％的溶液中的特性黏度[η]值列于表1。 聚合物的[η]正比于溶液中大分子线团的流体力学体积，因而能反应大分子线团收敛、卷曲的程度。从表1可知，随共聚物的TA链节摩尔分数的增加，其水溶液的[η]值逐渐减小，在w(NaCl)=5％的溶液中也是持续减小。这是因为在稀溶液中，疏水基团缔合以分子内缔合为主，随着TA摩尔分数的增加，分子内缔合增强，导致分子链卷曲。在盐溶液中，由于离子电荷的作用，使疏水链节分子内缔合力增强，分子链收缩，因而[η]值也持续下降。 2．2疏水基团TA摩尔分数对聚合物溶液黏度的影响 图1和图2分别表示P(AM/TA)系列共聚物及PAM在蒸馏水和w(NaCl)=5％的溶液中表观黏度与聚合物质量分数的关系曲线。PAM溶液黏度随其质量分数的增加而平缓上升，而疏水共聚物溶液的质量分数为3O％～4O％时其黏度急剧增加，表明疏水基团聚集而导致分子间缔合，形成了物理交联网络。此时共聚物溶液的质量分数即是临界缔合的质量分数。如图1所示，随TA摩尔分数增加，共聚物溶液的黏度显著增加。当疏水基团摩尔分数较高时，其溶液黏度随质量分数增加的速度更快，共聚物的临界缔合质量分数降低。如图2所示，加入Nacl溶液后，溶液表观黏度有较大提高，如质量分数为O％的P(AM/TA)-1 5聚合物溶液在20℃，转速为6r／min时，黏度达OmPs，而在水溶液中的黏度只有374mPa·s。不同TA摩尔分数的聚合物的质量分数均较其在纯水中低。Hydrophobically associating polymer P (AMTA) the nature of the study solution Hydrophobically associating water-soluble polymer is the hydrophilic polymer with a small amount of macromolecular chain hydrophobic group of a class of water-soluble Aqueous solution in the polymer， the hydrophobic groups and between the role as a result of hydrophobic aggregation occurred， so that large molecules have a molecular chain and inter-molecular Associating the critical mass fraction of the above， the formation of intermolecular association based supramolecular structure， increases the volume of fluid mechanics， it has good by In salt solution， because of the addition of small molecule electrolyte solution increased polarity， so that co-operation with enhanced hydrophobic association， shows that the nature of the Hydrophobically associating water-soluble polymer-based synthesis is difficult and not easily characterized， in part to hydrophobic chains connected to the water-soluble polymer， the general use of micellar copolymerization， or the use of the large surfactant monomer to copolymerization， polymer micelles need in the system by adding a large number of surface-active agent， which， after an increase of the complexity of the The use of the surface monomer copolymerization， the need for prior synthesis of large monomer， this technology also has considerable Author tetradecyl acrylate used as a hydrophobic monomer， the direct use of precipitation polymerization Preparation of hydrophobically associating polymer P (AM / TA) copolymers， so that the product of copolymerization and post-processing is more simple and easy And characterization of nitrogen determination Kedar copolymer composition， study the solution properties of copolymers of styrene-acrylic emulsion and of the 1 Experimental 1 Reagents Acrylamide (AM)， the mass fraction of not less than 985 percent， according to documents provided by purification methods; N， N-dimethylformamide (DMF)，分析纯; methanol， sodium chloride， chemical pure; acrylic 10 four acetate (TA)， laboratory-made; styrene-acrylic emulsion resin from Fuzhou in Fujian Province L 2P (AM / TA) Copolymer Check that a certain amount of monomer AM and TA， using DMF dissolved into three-neck bottle， pass oxygen Warming to 80 ℃， reaction by adding initiator 4h， filtering， washing the product several times with methanol to remove unreacted 40 ℃ vacuum drying to constant 3 Analysis and Testing Determination of nitrogen Kedar will be the composition of Determination of intrinsic viscosity with copolymer solution viscosity [η]， the test temperature (30 ± O1) ℃ Apparent viscosity of polymer solution with NDJ-I-type rotary viscometer 2 Results and Discussion 1 Dilute Solution Properties of Copolymers of different mole fraction of hydrophobic groups of the P (AM / TA) copolymers in distilled water， and w (NaCl) = 5% of the solution intrinsic viscosity [η] values listed in Table Polymer [η] is proportional to the solution of the fluid dynamics of macromolecular coil volume， which can respond to the convergence coil macromolecules， the degree of We can see from Table 1， with the copolymer chain of the TA increase in mole fraction， the aqueous solution of [η] value decreases in w (NaCl) = 5% of the solution is continued to This is because in dilute solution， the hydrophobic group to intramolecular association based association， with the mole fraction of the increase in TA， to enhance intramolecular association， resulting in the molecular chain In salt solution， because of the role of ionic charge， so that intramolecular hydrophobic chain to enter into force enhancement， molecular chain contraction， so [η] value continued to TA hydrophobic group 2 mole fraction of polymer solution viscosity on the impact of figures 1 and 2， respectively， P (AM / TA) series of copolymers and PAM in distilled water， and w (NaCl) = 5% in the apparent viscosity of the solution and the relationship between the mass fraction of polymer PAM solution viscosity with the increase of mass fraction of gentle rise， and the hydrophobic copolymer solution for the mass fraction of 3O% ~ 4O%， when a sharp increase in viscosity， indicating that aggregation of hydrophobic groups and lead to intermolecular association， forming a physical crosslinking网络 At this point the mass fraction of copolymer solution that is the critical mass fraction of the As shown in Figure 1， with the mole fraction of TA increased， the viscosity of copolymer solution increased When the mole fraction of hydrophobic groups is high， the solution viscosity increases with the mass fraction of the faster， the critical aggregation copolymer mass fraction As shown in Figure 2， by adding Nacl solution， the solution has greatly enhanced apparent viscosity， such as the mass fraction of O% for the P (AM / TA) -1 5 polymer solution at 20 ℃， rotation speed 6r/min ， the viscosity of OmPs， and viscosity in aqueous solution only 374mPa TA different mole fraction of the mass fraction of polymer in water were
免费的就不太清楚了。如果你是学生的话，可以在学校的图书馆里下载，电子阅览室。那里面有很多论文网站的。你可以在那里面搜索到你想要的文章的。希望对你有帮助。
推荐到OA图书馆，可免费下载全文。输入英文关键词即可。
中国知网，x-mol，ACS，sci-hub这些都是好的文献检索网站。
化学英文论文网站有哪些好的期刊
有一个《海外英语》，还有《青春岁月》这两个刊物可以刊出全英文稿件，除此以外，英语专业的也可以考虑，比如《校园英语》之类
相信很多人会遇到这样一个类似的问题，那就是在英文论文写好之后，却苦于找不到国内经常使用的论文发表期刊有哪些。下面是根据多年的经验总结出来的其中比较受欢迎的期刊，希望对您有一定帮助。至于查重可以了解一下paperfree。谢谢！zAcademic Journal of Xi'an Jiaotong University（English Edition）Acta Geologica SinicaActa Mathematica ScientiaActa Oceanologica SinicaActa Pharmacologica SinicaActa Seismologica SinicaADVANCES IN ATMOSPHERIC SCIENCESApplied Mathematics A Journal of Chinese UniversitiesBiomedical and Environmental SciencesCell ResearchChemical Research in Chinese UniversitiesChina WeldingChinese Annals of Mathematics，Series BChinese Chemical LettersChinese Geographical ScienceChinese Journal of AeronauticsChinese Journal of Astronomy and AstrophysicsChinese Journal of Cancer ResearchChinese Journal of Chemical EngineeringChinese Journal of GeochemistryChinese Journal of Integrative MedicineChinese Journal of LasersChinese Journal of Mechanical EngineeringChinese Journal of Oceanology and LimnologyChinese Journal of Polar ScienceChinese Journal of Reactive PolymersChinese Journal of Sexually Tuansmitted InfectionsChinese Journal of Traumatology （English Edition）Chinese Medical JournalChinese Medical Sciences JournalChinese Quarterly Journal of MathematicsChinese Rice Research NewsletterChinese Science BulletinCommunications In Theoretical PhysicsEarthquake Engineering and Engineering VibrationElectricityForestry Studies in ChinaGeo-spatial Information ScienceHigh Technology LettersHunan Agricultural Science & Technology NewsletterInternational Journal of Plant Engineering and ManagementJournal of Beijing Institute of TechnologyJournal of Central South University of Technology（English Edition）Journal of China University of GeosciencesJournal of China University of Mining and TechnologyJournal of Chongqing University（English Edition）Journal of Coal Science & Engineering（China）Journal of Computer Science and TechnologyJournal of Electronics（China）Journal of Environmental SciencesJournal of Forestry ResearchJournal of Geographical SciencesJournal of Harbin Institute of Technology（New Series）Journal of Huazhong University of Science and Technology（Medical Sciences）Journal of HydrodynamicsJournal of Iron and Steel Research，InternationalJournal of Materials Science & TechnologyJournal of Nanjing Medical University（English Edition）Journal of Northeast Agricultural University（English Edition）Journal of Rare EarthsJOURNAL OF SHANGHAI JIAOTONG UNIVERSITYJournal of Shanghai Second Medical UniversityJournal of Shanghai University（English Edition）Journal of Southeast University（English Edition）Journal of Southwest Jiaotong University（Englis Edition）Journal of Systems Engineering and ElectronicsJournal of Systems Science and ComplexityJournal of Traditional Chinese MedicineJournal of Tropical MeteorologyJournal of University of Science and Technology BeijingJournal of Wuhan University of Technology （Materials Science Edition）Journal of Zhejiang University（Science）Nuclear Science and TechniquesNumerical Mathematics A Journal of Chinese Universities English SeriesPedospherePlasma Science and TechnologyProgress in Natural ScienceRare MetalsReproduction & ContraceptionScience In China （Chemistry）SCIENCE IN CHINA （Earth Sciences）Science In China （Information Sciences）Science In China （Life Sciences）Science In China （Mathematics Physics Astronomy）Science In China （Technological Sciences）Semiconductor Photonics and TechnologyThe Chinese-German Journal of Clinical OncologyThe Journal of China Universities of Posts and TelecommunicationsTransactions of Nanjing University of Aeronautics and AstronauticsTransactions of Nonferrous Metals Society of ChinaTransactions of Tianjin UniversityTsinghua Science and TechnologyWuhan University Journal of Natural Sciences
公认的为JACS(Journal of the American Chemical Society， 美国化学会志) 和ANGEW(Angewandte Chemie International Edition 德国应用化学）
可以提供些资料给你，如果还是不会写的话
化学英文论文网站有哪些好的名字
有DOI号的外文文献请直接上 sci-se 免费下载。国内外文检索的网站有：百度学术、文献小镇等，搜到DOI号后方法同上。以下是SCI、EI等各大外文文献索引及数据库：（数目过多，需要链接的可以追问）ACM Digital Library－Association for Computing Machinery Digital Library ACS Publications [美国化学学会电子期刊]A&HCI [艺术与人文引文索引]AIP－American Institute of Physics [美国物理联合会数据库] APS－American Physical Society [美国物理学会数据库]ASCE（美国土木工程师学会电子期刊及会议录数据库)ASME（美国机械工程师学会电子期刊及会议录数据库）CPCI [会议录引文索引]EBSCO ASP 学术期刊集成全文数据库 EBSCO BSP 商业资源电子文献全文数据库EBSCO ERICElsevier ScienceDirectEmerald全文期刊库（管理学、工程学）EMS（欧洲数学学会）数据库ESI（Essential Science Indicator）基本科学指标数据库 EV（EI、INSPEC 工程索引）HeinOnline 法律数据库IEL(IEEE/IET Electronic Library)Incites-Benchmarking（综合索引库）Innography 高端专利分析工具JCR - Journal Citation Reports（期刊引证报告）JSTOR（过期期刊与图书）MathSciNet 美国数学评论OSA（美国光学学会电子期刊数据库）ProQuest Dialog 国际联机检索平台 RSC－Royal Society of Chemistry [英国皇家化学学会电子期刊] Science Citation Index（科学引文索引）SciFinder（美国化学文摘社）Social Science Citation Index（社会科学引文索引）Springer E-journal（SLCC 斯普林格电子期刊）Springer 电子书Westlaw 法学专业数据库Wiley Online Library（Wiley Online Library电子期刊和在线图书）日本知识库（JapanKnowledge）中数图外文电子图书数据库
掌桥科研，维普期刊等等。用的比较多的是掌桥科研。
英语论文网站有哪些好的网站
推荐OA图书馆，里面查到论文都可以免费下载。因为很多期刊为了提高被引率，都开始免费提供下载了。OA图书馆收集了这些资料，并制作了搜索引擎。你可以很方便的查到你想要的论文。都是学术性的论文，搜索英文论文，需要你输入英文关键词就可以了。
OA图书馆让学者可以免费下载学术文献和论文，并在这个平台上发表自己的论文。提供Open Access数据库资源seek68文献馆是中外数据库的整合，是中文外文文献的汇总，包括疑难文献解决和论文检测。适合校外生和科研工作者。有免费试用。加入会员费用很低而且不限量下载。ZLibrary是一个免费电子书籍搜索下载网站，号称世界最大的免费电子图书馆。拥有513万多书籍和7751万多文献下载。Sci-hub是一个免费下载外文文献网站，但因某些问题，需常常更换域名，有时会出现打不开链接的情况。ABC Chemistry是化学方面的免费全文网上期刊数据库，分为永久期刊和临时期刊两大类。
自动化英语论文网站有哪些好的
我知道有一个站叫做crossedit提供这种服务，服务还蛮好的，售后也很有保障，我都是去那里的。你可以去他们的网站看看他们编辑具有相关专业的背景，并且安排英语母语编辑处理，确保翻译质量
原上草论文网站很好，你去看看有没有你所要的论文。
推荐OA图书馆，里面查到论文都可以免费下载。因为很多期刊为了提高被引率，都开始免费提供下载了。OA图书馆收集了这些资料，并制作了搜索引擎。你可以很方便的查到你想要的论文。都是学术性的论文，搜索英文论文，需要你输入英文关键词就可以了。