標(biāo)題: Titlebook: Recent Advances in Anionic Polymerization; Proceedings of the I Thieo E. Hogen-Esch,Johannes Smid Conference proceedings 1987 Elsevier Scie [打印本頁] 作者: 嚴(yán)厲 時(shí)間: 2025-3-21 17:00
書目名稱Recent Advances in Anionic Polymerization影響因子(影響力)
書目名稱Recent Advances in Anionic Polymerization影響因子(影響力)學(xué)科排名
書目名稱Recent Advances in Anionic Polymerization網(wǎng)絡(luò)公開度
書目名稱Recent Advances in Anionic Polymerization網(wǎng)絡(luò)公開度學(xué)科排名
書目名稱Recent Advances in Anionic Polymerization被引頻次
書目名稱Recent Advances in Anionic Polymerization被引頻次學(xué)科排名
書目名稱Recent Advances in Anionic Polymerization年度引用
書目名稱Recent Advances in Anionic Polymerization年度引用學(xué)科排名
書目名稱Recent Advances in Anionic Polymerization讀者反饋
書目名稱Recent Advances in Anionic Polymerization讀者反饋學(xué)科排名
作者: ALERT 時(shí)間: 2025-3-21 23:24 作者: misshapen 時(shí)間: 2025-3-22 02:09
The Effect of Molecular Weight on Association in Anionic Polymerizationh high molecular weight species is sufficiently high that it modifies the kinetics of the propagation reaction. The kinetic order changes from one quarter to one half with dilution to follow the change in equilibrium, with parallel changes in activation energy. Also the propagation rate differs for very low molecular weight species.作者: Colonoscopy 時(shí)間: 2025-3-22 07:52
Kinetics and Thermodynamics of Anionic Polymerization of 2-Isopropenyl Pyridine in Tolueneer conditions of interest. We now wish to report the direct determination of both the rates of polymerization and depolymerization of 2-isopropenyl pyridine (2-IP) in toluene with Li. as counter-ion, and the comparison of the thermodynamic results with the kinetic data.作者: Hemiplegia 時(shí)間: 2025-3-22 11:03
Stereospecificity in Anionic Polymerizationth all counter-ions on the reaction time scale. Counter-ion positional exchange is however rapid in THF but slows somewhat in toluene. Diad structure is not defined until the next monomer adds. The determination of 1,2 or 1,4 structure in diene polymerization is decided in the same manner, a common characteristic of anionic polymerization.作者: 有效 時(shí)間: 2025-3-22 15:01 作者: Synovial-Fluid 時(shí)間: 2025-3-22 20:41
Cation Effects in Organoalkali Metal Chemistry, although here some small carbon-lithium covalency may enhance bonding [2]. From the simplified structure R.M., it is tempting to think that the nature of M. is unimportant, in other words, that one is concerned only with the chemistry of “carbanions” in discussing the reaction of R.M..作者: Generator 時(shí)間: 2025-3-23 00:35 作者: Indelible 時(shí)間: 2025-3-23 03:59 作者: MELD 時(shí)間: 2025-3-23 09:25
Clarification of some Problems of Anionic Polymerizationpublished during the last 20 years [1], The published results are, on the whole, mutually consistent and accounted for by plausible mechanisms accepted by the workers in this field. There are, nevertheless, some contradictory claims pertaining mainly to polymerizations involving Li counter-ions and proceeding in hydrocarbon solvents.作者: Mercantile 時(shí)間: 2025-3-23 12:03
Stereoelective Anionic Polymerization of Chiral Vinyl Monomers Via Interconverting Ion Pair Epimerschiral centers at the end of the growing chain. The ion pair is considered the last chiral center. The resulting diastereomeric dyads, triads, and tetrads are given for each mechanism. Many of these mechanisms predict that by controlling the optical purity of the monomer feed one may control the stereoregularity of the resulting polymer.作者: Cougar 時(shí)間: 2025-3-23 17:09
Cation Effects in Organoalkali Metal Chemistryostatic forces between cations and anions. This generalization [1] is believed to hold even for organolithium compounds with localized negative charge, although here some small carbon-lithium covalency may enhance bonding [2]. From the simplified structure R.M., it is tempting to think that the natu作者: 比喻好 時(shí)間: 2025-3-23 20:48
Structure and Dynamic Behavior of Organolithium Compoundsxist as the partially negative part of some organometallic compound. Ideally, in order to learn about carbanions one should study organocesium or organorubidium compounds since these materials are most likely to contain carbanions. Unfortunately, such compounds do not form stable solutions; they eit作者: oxidize 時(shí)間: 2025-3-24 01:41 作者: collagenase 時(shí)間: 2025-3-24 05:21
New Aspects of Carbanion Chemistry. Structure of Pentadienyl Anions and Butenediyl Dianions and theilvated pentadienyllithium assumes the W-shaped (.,.)-geoemtry. The EHMO calculation on the pentadienylpotassium indicates the substantial stability of the U-shaped geometry. A variety of transmetallation of pentadienylpotassium is summarized briefly. A novel preparative method of 2-butene-l,4-diylma作者: SPURN 時(shí)間: 2025-3-24 08:00 作者: 溫和女人 時(shí)間: 2025-3-24 14:31
Clarification of some Problems of Anionic Polymerizationymerization. Vigorous studies of anionic polymerization started in the late fifties, and progress in this field has been reported in numerous reviews published during the last 20 years [1], The published results are, on the whole, mutually consistent and accounted for by plausible mechanisms accepte作者: chlorosis 時(shí)間: 2025-3-24 15:29 作者: 愛國(guó)者 時(shí)間: 2025-3-24 20:36 作者: Albumin 時(shí)間: 2025-3-24 23:32
Kinetics and Thermodynamics of Anionic Polymerization of 2-Isopropenyl Pyridine in Toluenese, the anionic polymerization of alpha-substituted vinyl monomers [3–9] was most readily studied because of their relatively low ceiling temperature. In these studies, both the polymerization rate constants and equilibrium constants have been determined but the rate of depolymerization has not been作者: Inveterate 時(shí)間: 2025-3-25 06:24
Mechanistic Aspects of the Reversibility and Irreversibility of the Anionic Polymerization of α-Meth strict reversibility of a polymerization are defined. Deviation from strict reversibility for polymerization in bulk and in non-polar solvent is discussed together with its implication for thermodynamic studies based on data obtained from the equilibrium polymerization. In the case of the bulk poly作者: 教唆 時(shí)間: 2025-3-25 07:31
Donor-Acceptor Interactions of the Active Centres of Chain Propagation in the Anionic Polymerizationquantitative evidence and conclusions. Much of the published data on principle parameters are contradictory and insufficiently reliable. The only exceptions are the polymerizations of methyl methacrylate . and the vinyl pyridines ..作者: canonical 時(shí)間: 2025-3-25 12:25
Pyridine-Mediated Anionic Homo-and Copolymerization of Alkylmethacrylateylacrylamide, ε-caprolactone and alkylmethacrylate. Pyridine gives rise to monodisperse polymethylmethacrylate (PMMA) at a temperature higher than normally observed. We believe this reflects a new mechanism, involving a living polymerization, which should have profound implications for the design of作者: Fecal-Impaction 時(shí)間: 2025-3-25 18:42 作者: CORD 時(shí)間: 2025-3-25 20:26 作者: Leaven 時(shí)間: 2025-3-26 01:53
Kinetics and Mechanisms in the Anionic Polymerization of Methacrylic Estersdistributions. From the kinetics of polymerization and from the microstructure of the polymers the existence of different active species is concluded, the most important one being a peripherally solvated contact ion pair. Depending on polymerization conditions two different modes of monomer addition作者: 奇怪 時(shí)間: 2025-3-26 07:58
Stereoelective Anionic Polymerization of Chiral Vinyl Monomers Via Interconverting Ion Pair Epimersll of the possible diastereomeric ion pair epimers are assumed to be formed initially. Stereoelection is assumed to be absolute and controlled by the chiral centers at the end of the growing chain. The ion pair is considered the last chiral center. The resulting diastereomeric dyads, triads, and tet作者: certain 時(shí)間: 2025-3-26 09:05
Conference proceedings 1987ers all over the world. The exciting discovery of termination-less polymerization processes and living polymers culminating in the development of narrow molecular weight polymers, star polymers, and tailor-made block and graft copolymers, contributed immensely to the rapid expansion of polymer scien作者: 感激小女 時(shí)間: 2025-3-26 14:15
Kinetics and Mechanisms in the Anionic Polymerization of Methacrylic Esters can occur. Homo- and copolymerization experiments show that the influence of the ester group is mainly given by electronic effects. In non- polar solvents the polymerization of ..-butyl methacrylate (in contrast to methyl methacrylate) leads to 100% isotactic polymers with rather low polydispersities.作者: condemn 時(shí)間: 2025-3-26 19:57
Anionic Polymerization of 4′-Vinylbenzocrown Ethersn the counter cations and the polymer-bound crown ether ligands. From the dissociation constants and the observed rate constants at different carbanion salt concentrations the ion pair and free ion propagation rate constants for styrene, p-methoxystyrene and 4 -vinylbenzo-15-crown-5 with potassium as counter ion were obtained in THF at -70°C.作者: 儲(chǔ)備 時(shí)間: 2025-3-26 23:29
G. Huynh-Ba,J. E. McGrathmputing systems. The papers accepted for presentation th- oughly cover the entire field of Human-Computer Interaction, addressing major - vances in knowledge an978-3-540-73332-4978-3-540-73333-1Series ISSN 0302-9743 Series E-ISSN 1611-3349 作者: 拾落穗 時(shí)間: 2025-3-27 04:49
Mechanistic Aspects of the Reversibility and Irreversibility of the Anionic Polymerization of α-Methent, the specific case of the polymerization initiated with potassium in toluene is considered. Reversible propagating species are formed. However, because the propagation is very slow, transfer to the solvent and monomer and transformation of the reversible species into irreversible ones occur befo作者: 濕潤(rùn) 時(shí)間: 2025-3-27 05:43 作者: Mediocre 時(shí)間: 2025-3-27 13:10
dipolar carbanions impinge on the field of anionic polymerization. More sophisticated characterization techniques have been instrumental in obtaining better correlations between the structure of polymers and that of intermediates leading to their formation. This book contains the proceedings of the internati978-94-010-7924-2978-94-009-3175-6作者: 激怒某人 時(shí)間: 2025-3-27 14:42
Gideon Fraenkelese aspects is considerable, as can be seen from all the statistics on the reasons for incapacity and early retirement and on the relative contributions of different ill- nesses to total mortality. Effective avoidance of illnesses by primary prophylaxis (elimi- nation of the causes of disease) or early detect978-3-642-70374-4978-3-642-70372-0作者: NOVA 時(shí)間: 2025-3-27 19:20
S. Hubert,C. Momtaz,P. Hemery,S. Boileau,J. P. Kintzingerese aspects is considerable, as can be seen from all the statistics on the reasons for incapacity and early retirement and on the relative contributions of different ill- nesses to total mortality. Effective avoidance of illnesses by primary prophylaxis (elimi- nation of the causes of disease) or early detect978-3-642-70374-4978-3-642-70372-0作者: 充氣球 時(shí)間: 2025-3-27 23:14
Hajime Yasuda,Kazuyuki Tatsumi,Akira Nakamuraese aspects is considerable, as can be seen from all the statistics on the reasons for incapacity and early retirement and on the relative contributions of different ill- nesses to total mortality. Effective avoidance of illnesses by primary prophylaxis (elimi- nation of the causes of disease) or early detect978-3-642-70374-4978-3-642-70372-0作者: 熟練 時(shí)間: 2025-3-28 02:40
Minoru Matsuda,Akira Watanabecontains the papers presented during the workshop. All these papers are directly related to the general aim: the ex- change of experience collected in the field of ergonomic data for equipment design on the one hand and the definition of unexplored areas on the other. It is hoped that this presentat作者: 失敗主義者 時(shí)間: 2025-3-28 07:04 作者: 溫和女孩 時(shí)間: 2025-3-28 13:05
Michael Szwarc isometric muscular strength of the predominant arm. Maximum grip strength is observed to be at flexor 90°, elbow flexor 120°, and wrist 0°. The heart rate monitor was used to evaluate the physiological stress of different work postures of the workers in a radial drilling machine. Based on this stud作者: 扔掉掐死你 時(shí)間: 2025-3-28 14:37 作者: 熱烈的歡迎 時(shí)間: 2025-3-28 19:34
Freddy Gils,Marcel Van Beylen,Johannes Smidmen trained in the human sciences entered industry to study men at work. They made con- tributions which set a new standard of scientific investigation into human performance and allowed executive action on the basis of evidence rather than of hunch. The Board‘s work differed from the contribution of Gilbreth978-0-412-21990-0978-94-009-5878-4作者: 維持 時(shí)間: 2025-3-29 00:58 作者: acrophobia 時(shí)間: 2025-3-29 05:56 作者: 不規(guī)則 時(shí)間: 2025-3-29 10:41 作者: 刺激 時(shí)間: 2025-3-29 15:17
airments on the performance while using any graphical user interfaces by applying specific filter algorithms on the target interface. This enables evaluations of the GUI under realistic conditions without being forced to actually involve real impaired participants.作者: 是他笨 時(shí)間: 2025-3-29 16:40
S. Bywaterdation is based on the correlation between the average score of the rating of attitudes in a questionnaire and the number of technologies the respondents reported using (r = .597, p <.0001). In addition, these three dimensions explain for 35% of the variance (adjusted R . = .355) in the use of techn作者: AVOW 時(shí)間: 2025-3-29 20:14 作者: WAX 時(shí)間: 2025-3-30 00:08
Axel H. E. Müller 73 countries submitted contributions, and 1,397 papers that were judged to be of high scientific quality were included in the program. These papers - dress the latest research and development efforts and highlight the human aspects of the design and use of computing systems. The papers accepted for作者: 集合 時(shí)間: 2025-3-30 07:12 作者: Living-Will 時(shí)間: 2025-3-30 11:20 作者: 表示問 時(shí)間: 2025-3-30 15:49
S. Hubert,C. Momtaz,P. Hemery,S. Boileau,J. P. Kintzingeran be summed up under the heading of "preventive health care." There is a close link between this development and the changing morbidity pattern. In highly developed countries the morbidity rate attributable to infectious diseases has been much reduced, while the various types of arteriosclerosis, s作者: inspiration 時(shí)間: 2025-3-30 17:02 作者: 有特色 時(shí)間: 2025-3-30 23:03
Minoru Matsuda,Akira Watanaben labour and to the introduction of their research results and field experience into the process of equipment design. However, the rapid increase in complexity of equipment in use as well as in development demonstrates the necessity of broaden- ing the point of view continuously. The workshop held i作者: 種類 時(shí)間: 2025-3-31 01:17
ea of human labour and to the introduction of their research results and field experience into the process of equipment design. However, the rapid increase in complexity of equipment in use as well as in development demonstrates the necessity of broaden- ing the point of view continuously. The works作者: 接觸 時(shí)間: 2025-3-31 08:52 作者: 無畏 時(shí)間: 2025-3-31 10:04 作者: 導(dǎo)師 時(shí)間: 2025-3-31 16:28
