Reactive Polymers最新文献_第9页

Comparison between structure and some properties of methacrylonitrile and acrylonitrile macroporous copolymers 甲基丙烯腈与丙烯腈大孔共聚物的结构与性能比较

Reactive Polymers Pub Date : 1994-10-01 DOI: 10.1016/0923-1137(94)90011-6

Bożena N. Kolarz , Maria Wojaczyńska , Jolanta Bryjak , Barbara Pawłów

引用次数: 11

Preparation of Pd-containing polysulfone film and the reaction chemistry of Pd complex in polysulfone 含Pd聚砜膜的制备及Pd配合物在聚砜中的反应化学

Reactive Polymers Pub Date : 1994-10-01 DOI: 10.1016/0923-1137(94)90020-5

I. Shim, Kee-Sook Kim, Sinwoo Kim, Won-Suk Oh, Seok-Jong Oh, Yong-Sik Yang, Hwan-Kyu Suh, Sangkyu Lee

引用次数: 4

Synthesis and properties of 1-(2-aminoethyl)piperazine resin used in the sorption of the platinum group and gold ions 用于吸附铂基和金离子的1-(2-氨基乙基)哌嗪树脂的合成及性能

Reactive Polymers Pub Date : 1994-10-01 DOI: 10.1016/0923-1137(94)90017-5

Chen Yiyong, Yuan Xingzhong

引用次数: 42

Thermodynamics of multiple stimuli-responsive polyelectrolytes with complexing ability towards the copper(II) ion 具有对铜(II)离子络合能力的多刺激响应型聚电解质的热力学

Reactive Polymers Pub Date : 1994-10-01 DOI: 10.1016/0923-1137(94)90004-3

Mario Casolaro

{"title":"Thermodynamics of multiple stimuli-responsive polyelectrolytes with complexing ability towards the copper(II) ion","authors":"Mario Casolaro","doi":"10.1016/0923-1137(94)90004-3","DOIUrl":"10.1016/0923-1137(94)90004-3","url":null,"abstract":"<div>The thermodynamics of protonation of carboxylate groups in polymers containing amido and isopropyl moieties was studied in 0.1 M NaCl at different temperatures. Compared with polymers with the l-leucine moiety, poly(N-acryloyl-l-valine) showed a wider decreasing linearity of the basicity constant (log K) in relation to the degree of protonation (α), with a minimum at α = 0.65. Under these conditions, a sharp endothermic peak revealed the presence of hydrophobic interactions as the macromolecule assumed a compact coil conformation and water molecules were released with an increase in entropy. The graft polymers on the surface of a polyurethane film displayed larger potentiometric hysteresis loops with respect to the cellulose support, as the nature of the polymer was similar to that of the hydrophobic substrate. The reversible configuration of the graft polymer chains instantly responded to changes in pH and temperature, modifying the rate of water filtration through the membrane pores. As the temperature approached 31°C an abrupt increase in water permeation was observed even though the graft polymer was in the uncharged and coiled state. The polyelectrolyte formed a hydroxo-complex species, involving two monomer units (L−) of the polymer, with the Cu(II) ion. Electron paramagnetic resonance (EPR) spectra, supported by conductometric data, revealed Cu(OH)2L22− stoichiometry in solution. The potentiometric data showed a good fit when processed by the Superfit program and a decreasing pattern of log β in relation to pH.</div>","PeriodicalId":20864,"journal":{"name":"Reactive Polymers","volume":"23 2","pages":"Pages 71-83"},"PeriodicalIF":0.0,"publicationDate":"1994-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0923-1137(94)90004-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75278959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Polymer technology dictionaryBy T. Whelan. Chapman and Hall, London, 1994, viii + 555 pp., ISBN 0-412-581180-9; £85.00 聚合物技术词典，T.惠兰著。查普曼和霍尔，伦敦，1994年，viii + 555页，ISBN 0-412-581180-9;£85.00

Reactive Polymers Pub Date : 1994-10-01 DOI: 10.1016/0923-1137(94)90029-9

D. Sherrington

引用次数: 1

PAT '95, 3rd International Symposium on polymers for advanced Technologies, Pisa, Italy, 11–15 June, 1995 1995，第三届国际聚合物先进技术研讨会，意大利比萨，1995年6月11-15日

Reactive Polymers Pub Date : 1994-10-01 DOI: 10.1016/0923-1137(94)90032-9

引用次数: 0

Purification of nickel and zinc from waste waters of metal-plating plants by ion exchange 离子交换法净化金属镀锌厂废水中的镍和锌

Reactive Polymers Pub Date : 1994-10-01 DOI: 10.1016/0923-1137(94)90024-8

H. Leinonen, J. Lehto, A. Mäkelä

引用次数: 42

Uptake of uranyl ions by new sorbing polymers: discussion of adsorption isotherms and pH effect 新型吸附聚合物对铀酰离子的吸附:吸附等温线和pH效应的讨论

Reactive Polymers Pub Date : 1994-10-01 DOI: 10.1016/0923-1137(94)90015-9

E. Guibal, I. Saucedo, J. Roussy, P. Le Cloirec

{"title":"Uptake of uranyl ions by new sorbing polymers: discussion of adsorption isotherms and pH effect","authors":"E. Guibal, I. Saucedo, J. Roussy, P. Le Cloirec","doi":"10.1016/0923-1137(94)90015-9","DOIUrl":"https://doi.org/10.1016/0923-1137(94)90015-9","url":null,"abstract":"<div>Chitosan is a natural polymer well known for its efficient uptake of heavy metals. The modification of this polymer by the substitution of functional groups from organic acids allows new sorbents with high sorption capacities to be obtained: NDTC with ascorbic acid and glutamate glucan with oxo-2-glutaric acid. The mechanism of sorption is investigated and several sorption models are applied such as the Freundlich, Langmuir and Temkin models which fit experimental results well. These results are explained by the heterogeneity of the polymer surface, the variability of metal species in solution and possible interactions between the molecules sorbed. The effects of several parameters such as pH and metal ion concentration are examined and demonstrate the relative importance of metal speciation on sorption performances and mechanisms. The grafting of functional groups creates some heterogeneity of sorption energy, which explains the selectivity seen in the best models. Metal ions are firstly bound onto more energetic sites (nitrogen groups) and later onto other substituting functions.</div>","PeriodicalId":20864,"journal":{"name":"Reactive Polymers","volume":"23 2","pages":"Pages 147-156"},"PeriodicalIF":0.0,"publicationDate":"1994-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0923-1137(94)90015-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91676390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 59

Synthesis and properties of 1-(2-aminoethyl)piperazine resin used in the sorption of the platinum group and gold ions 用于吸附铂基和金离子的1-(2-氨基乙基)哌嗪树脂的合成及性能

Reactive Polymers Pub Date : 1994-10-01 DOI: 10.1016/0923-1137(94)90017-5

Chen Yi-Yong, Yuan Xing-Zhong

引用次数: 42

Functional metallomacrocycles and their polymers. Part 31. Autoxidation of thiol by temperature-sensitive polymer catalyst containing cobalt(II) phthalocyanine complex 功能金属巨环及其聚合物。31日的一部分。含钴(II)酞菁配合物的温度敏感聚合物催化剂对硫醇的自氧化作用

Reactive Polymers Pub Date : 1994-10-01 DOI: 10.1016/0923-1137(94)90021-3

M. Kimura, T. Nishigaki, T. Koyama, K. Hanabusa, H. Shirai

引用次数: 14