Polymer Photochemistry最新文献

Polymer Photochemistry Pub Date : 1986-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0144-2880(86)90010-2

N.S. Allen

引用次数: 0

Antagonistic effects of hindered piperidines and organic sulphides in photostabilization of cis-1,4-polybutadiene 受阻哌啶和有机硫化物在顺式-1,4-聚丁二烯光稳定中的拮抗作用

Polymer Photochemistry Pub Date : 1986-01-01 DOI: 10.1016/0144-2880(86)90037-0

J. Lucki, S. Jian, J. Rabek, B. Rånby

引用次数: 10

Photodegradation of crosslinked polyethylene 交联聚乙烯的光降解

Polymer Photochemistry Pub Date : 1986-01-01 DOI: 10.1016/0144-2880(86)90035-7

A. Torikai, Sachiko Asada, K. Fueki

引用次数: 15

Organic phototransformations in non-homogeneous media 非均匀介质中的有机光转化

Polymer Photochemistry Pub Date : 1986-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0144-2880(86)90031-X

F. Wilkinson

引用次数: 7

Photolysis of Poly[1-(4-substituted phenyl)-2-propen-1-one] in the solid phase 聚[1-(4-取代苯基)-2-丙烯-1- 1]在固相中的光解反应

Polymer Photochemistry Pub Date : 1986-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0144-2880(86)90012-6

P. Hrdlovič , J.E. Guillet

{"title":"Photolysis of Poly[1-(4-substituted phenyl)-2-propen-1-one] in the solid phase","authors":"P. Hrdlovič , J.E. Guillet","doi":"10.1016/0144-2880(86)90012-6","DOIUrl":"10.1016/0144-2880(86)90012-6","url":null,"abstract":"<div>Photolysis of poly[1-(4-substituted phenyl]-2-propen-1-ones] in film of thickness 5–10 μm was followed by automatic viscometry, lowangle laser light scattering (LALLS) and gel permeation chromatography (GPC) under irradiation at 313 and 285·8 nm in air. The substituents in position 4 of the benzene ring were: H, fluoro, chloro, methoxy and ethyl. The monitoring of degradation by automatic viscometry and LALLS enabled determination of the Mark-Houwink parameters α and K for the above polymers in chlorobenzene at 25°C as follows. H: α = 0·76 ± 0·03, K = 3·8 × 10−3; 4-F: α = 0·69 ± 0·02, K = 6·1 × 10−3; 4-Cl: α = 0·79 ± 0·03, K = 1·4 × 10−3; 4-C2H5: α = 0·85 ± 0·03, K = 1·3 × 10−3; 4-OCH3: α = 0·75 ± 0·06, K = 2·3 × 10−3. The plots of main chain scission versus time were curved, which indicates inhibition at the later stage of degradation. The initial quantum yields of main chain scissions are about 0·08 except for the 4-methoxy derivative, in which case strong oxygen quenching causes the quantum yield to lie one order of magnitude lower. The unsaturated ketone formed during photolysis quenches the main chain scissions with Stern-Volmer constants which lie within the range 50–150 mol−1 for the polyketones under study.</div>","PeriodicalId":101036,"journal":{"name":"Polymer Photochemistry","volume":"7 6","pages":"Pages 423-438"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0144-2880(86)90012-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74697106","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: 5

Contents of volume 7 第七卷内容

Polymer Photochemistry Pub Date : 1986-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0144-2880(86)90023-0

引用次数: 0

Flash photolysis of lignin: Part 1. Deaerated solutions of dioxane-lignin 木质素的闪光光解:第1部分。二氧六烷-木质素的脱氧溶液

Polymer Photochemistry Pub Date : 1986-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0144-2880(86)90007-2

Miguel G. Neumann, Robert A.M.C. De Groote, Antonio E.H. Machado

引用次数: 19

Heterocyclic ylide initiated photopolymerization of methyl methacrylate 杂环酰基引发甲基丙烯酸甲酯的光聚合

Polymer Photochemistry Pub Date : 1986-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0144-2880(86)90025-4

S. Saini, A.K. Srivastava

引用次数: 6

Comparative examination of sensitizers in photografting on polymer films 高分子薄膜光接枝增敏剂的比较研究

Polymer Photochemistry Pub Date : 1986-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0144-2880(86)90005-9

Hitoshi Kubota, Kyoko Kobayashi, Yoshitaka Ogiwara

{"title":"Comparative examination of sensitizers in photografting on polymer films","authors":"Hitoshi Kubota, Kyoko Kobayashi, Yoshitaka Ogiwara","doi":"10.1016/0144-2880(86)90005-9","DOIUrl":"10.1016/0144-2880(86)90005-9","url":null,"abstract":"<div>Photografting (λ > 300 nm) of methacrylic acid on low-density polyethylene film (thickness 30 μm) was carried out at 60°C for 60 min in water medium, and the activity of sensitizers towards the grafting was examined. Various sensitizers, involving hydrogen atom abstraction (aromatic ketones and quinones), radical generation, and energy transfer (aromatic hydrocarbons), were coated on the film sample beforehand. High percentages of grafting ( > 800%) were recorded for aromatic ketones (xanthone, thioxanthone and benzophenone), for quinones (2-chloroanthraquinone, 2-methylanthraquinone and 9,10-phenanthraquinone) and for radical generators (benzoin ethyl ether and phenyl disulfide). However, energy-transfer types (anthracene, phenanthrene and naphthalene) exhibited little effect on the grafting. Carbazoles, as well as the above sensitizers, were found to be considerably effective. Characteristics of each type of sensitizer are discussed in terms of the amount coated and the kinds of film (polypropylene and nylon 6) and monomer (acrylic acid and methyl methacrylate).</div>","PeriodicalId":101036,"journal":{"name":"Polymer Photochemistry","volume":"7 5","pages":"Pages 379-387"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0144-2880(86)90005-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82083719","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

Effect of light irradiation in the chiral complex of poly(l-lysine) with Methyl Orange 光照射对聚赖氨酸与甲基橙手性配合物的影响

Polymer Photochemistry Pub Date : 1986-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0144-2880(86)90003-5

Hiroyuki Yamamoto, Ayako Nishida, Katsuhiko Inouye

引用次数: 3