Reactive Polymers最新文献_第3页

Catalytic hydrogenation properties of Pd- and Rh-containing polymers immobilized on Al2O3 Al2O3固载Pd-和rh -聚合物的催化加氢性能

Reactive Polymers Pub Date : 1995-02-01 DOI: 10.1016/0923-1137(94)00089-N

E.Sh Mirzoeva , L.M Bronstein , P.M Valetsky , E.M Sulman

引用次数: 12

Thermochromism of metallophthalein in acrylamide copolymers with pendant pyridine substituents 含悬垂吡啶取代基的丙烯酰胺共聚物中金属酞的热致变色

Reactive Polymers Pub Date : 1995-02-01 DOI: 10.1016/0923-1137(94)00072-D

M. Nanasawa, Y. Min, M. Hirai

引用次数: 2

Preparation of poly(vinyl acetate) having a DMSO-like structure, and its use in accelerating penetration through paper 具有二甲基亚砜样结构的聚醋酸乙烯酯的制备及其在加速穿透纸张方面的应用

Reactive Polymers Pub Date : 1995-02-01 DOI: 10.1016/0923-1137(94)00073-E

T. Yamamoto, K. Mori, T. Fujiwara

引用次数: 2

Ion exchange equilibria of heavy metals in aqueous solution on new chelating resins of sporopollenin 新型孢粉螯合树脂中重金属在水溶液中的离子交换平衡

Reactive Polymers Pub Date : 1995-02-01 DOI: 10.1016/0923-1137(94)00084-I

M. Ersoz , E. Pehlivan , H.J. Duncan , S. Yildiz , M. Pehlivan

{"title":"Ion exchange equilibria of heavy metals in aqueous solution on new chelating resins of sporopollenin","authors":"M. Ersoz , E. Pehlivan , H.J. Duncan , S. Yildiz , M. Pehlivan","doi":"10.1016/0923-1137(94)00084-I","DOIUrl":"10.1016/0923-1137(94)00084-I","url":null,"abstract":"<div><p>Studies have been conducted on the sorption of several heavy metal ions Cu(II), Ni(II), Zn(II), Cd(II) and Al(III) from aqueous solutions on the new chelating exchangers of sporopollenin (<em>Lycopodium clavatum</em>) as a function of pH at several temperatures between 20 and 50°C. The novel metal-ligand exchange resins possessing oxime and carboxylic acid side arm functionality were prepared through the reaction of diaminosporopollenin with dichloroantiglyoxime and bromoacetic acid. The sorption of all metals increased considerably in the range of pH 6–10 and was observed in sequence as: Cu ≥ Ni > Zn > Cd > Al for carboxylated-diaminoethyl-sporopollenin (DAEC) and Ni ≥ Cu > Zn > Cd > Al for bis-diaminoethyl-glyoxime-sporopollenin (bDAEG). The level of pH of the aqueous medium had a large influence on the sorption capacity, and the uptake of metals, except Al(III), was found to be 90% or more. The metal-form resins afforded complete recovery of the sorbed species by acid stripping. Both resins also showed high stability towards concentrated acids and bases and retained their high capacity for heavy metals.</p></div>","PeriodicalId":20864,"journal":{"name":"Reactive Polymers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0923-1137(94)00084-I","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76286992","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: 31

Sorption of sulfide on a macroporous, quaternized poly(4-vinyl pyridine) in alkaline medium 大孔季铵化聚(4-乙烯基吡啶)在碱性介质中的硫化物吸附

Reactive Polymers Pub Date : 1995-02-01 DOI: 10.1016/0923-1137(94)00085-J

M. Chanda , G.L. Rempel

{"title":"Sorption of sulfide on a macroporous, quaternized poly(4-vinyl pyridine) in alkaline medium","authors":"M. Chanda , G.L. Rempel","doi":"10.1016/0923-1137(94)00085-J","DOIUrl":"10.1016/0923-1137(94)00085-J","url":null,"abstract":"<div><p>A newly available, macroporous anion-exchange resin Reillex™ HPQ, which has about 70% of the pyridine rings quaternized by the addition of methyl groups, has been used in the chloride form for the sorption of sulfide from alkaline aqueous medium. Comparative data on sulfide sorption capacity and kinetics in alkaline media are presented for this new resin and a common anion exchange resin Dowex-1-X8, both used in chloride form. The sulfide sorption capacities of HPQ(Cl<sup>−1</sup>) and Dowex-1(Cl<sup>−1</sup>), activated by treatment with mixed NaCl/HCl solution, are found to be 4.8 and 2.5 mmol S/g (dry), respectively, compared to the respective total exchange capacities of 4.6 and 5.6 mEq/g (dry), indicating that sulfide is predominantly sorbed as univalent HS<sup>−</sup> on HPQ(Cl<sup>−</sup>) and as bivalent S<sup>2−</sup> on Dowex-1(Cl<sup>−</sup>) this is attributed to the occurrence of nearly 30% of the pyridine sites in HPQ(Cl<sup>−</sup>) in protonated form, contributing to lower pH inside the resin phase as compared to external medium. The chloride/sulfide exchange kinetics, in conditions of particle diffusion control and infinite solution volume, are predicted with good approximation by the Nernst-Planck model. Both the chloride and sulfide counterions taking part in the exchange process diffuse very slowly in the resin, the diffusion coefficients being in the order of 10<sup>−10</sup> cm<sup>2</sup>/s, though chloride ions have relatively higher diffusivity than the sulfide ions.</p></div>","PeriodicalId":20864,"journal":{"name":"Reactive Polymers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0923-1137(94)00085-J","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85899227","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: 12

Selective hydrogenation of anisol to cyclohexyl methyl ether catalyzed by a silica-supported carboxymethyl cellulose-platinum complex under mild reaction conditions 硅负载羧甲基纤维素-铂配合物在温和反应条件下催化茴香醇选择性加氢制环己基甲基醚

Reactive Polymers Pub Date : 1995-02-01 DOI: 10.1016/0923-1137(94)00090-R

Li-Ming Tang, Zhao-Hong Meng, Mei-Yu Huang, Ying-Yan Jiang

引用次数: 4

Water-soluble photoresins based on polymeric azo compounds 基于偶氮化合物的水溶性光树脂

Reactive Polymers Pub Date : 1995-02-01 DOI: 10.1016/0923-1137(94)00093-K

P. Matusche , O. Nuyken , B. Voit , M. Van Damme , J. Vermeersch , W. De Winter , L. Alaerts

引用次数: 8

Polymeric short-fiber chromatographic supports for downstream processing of biomolecules 聚合物短纤维色谱支持下游处理的生物分子

Reactive Polymers Pub Date : 1995-02-01 DOI: 10.1016/0923-1137(94)00088-M

Anirudh Singh , Neville G. Pinto

{"title":"Polymeric short-fiber chromatographic supports for downstream processing of biomolecules","authors":"Anirudh Singh , Neville G. Pinto","doi":"10.1016/0923-1137(94)00088-M","DOIUrl":"10.1016/0923-1137(94)00088-M","url":null,"abstract":"<div><p>Fiber chromatography is prominent among the novel systems being developed for downstream processing. In this research, a polymer based anion-exchange support with fiber geometry has been developed. The fiber support has an asymmetric structure, with a dense skin and a porous substructure. Equilibrium adsorption capacities of this support for bovine serum albumin and β-lactoglobulin were measured. Isotherms were obtained at different pH and salt concentrations, and were found to be Langmuirian. It was also found that ion-exchange is the dominant adsorption mechanism, and, due to a large internal surface area, the support has a high adsorption capacity. The fiber support was packed in a bed, and tested for its applicability in the isolation of proteins from dilute solutions. The fiber column is shown to have a significantly lower pressure drop than columns packed with commercial, spherical supports. The frontal throughout for this column was evaluated at different conditions. The throughput was found to increase with flow rate and protein concentration, but the yield dropped with an increase in flow rate. However, the throughput and yield were high when a high concentration of protein was loaded at a low flow rate and washed at a very high flow rate.</p></div>","PeriodicalId":20864,"journal":{"name":"Reactive Polymers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0923-1137(94)00088-M","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86054532","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: 21

Nitrilasic activity of a resin amidase immobilized on poly(N-acryloylpiperidin-4-one) 固定化聚(n-丙烯酰胡椒苷-4- 1)树脂酰胺酶的硝化活性

Reactive Polymers Pub Date : 1995-02-01 DOI: 10.1016/0923-1137(94)00092-J

J. Taillades, L. Garrel, F. Guillen, H. Collet, A. Commeyras

引用次数: 1

Catalytic behavior of silica-supported polysilazane-platinum complex in the hydrogenation of xylenes 二氧化硅负载的聚硅氮烷-铂配合物在二甲苯加氢反应中的催化行为

Reactive Polymers Pub Date : 1995-02-01 DOI: 10.1016/0923-1137(94)00091-I

Chun-Wei Chen, Hong Yu, Mei-Yu Huang, Ying-Yan Jiang

引用次数: 4