Polymer Photochemistry最新文献_第6页

The radiation-induced graft copolymerisation of styrene/maleic anhydride and maleic anhydride/vinyl acetate onto cellulose 辐射诱导苯乙烯/马来酸酐和马来酸酐/醋酸乙烯在纤维素上的接枝共聚

Polymer Photochemistry Pub Date : 1986-01-01 DOI: 10.1016/0144-2880(86)90028-X

C.G. Beddows, M.H. Gil, J.T. Guthrie

引用次数: 8

Processing, structure and properties of block copolymers 嵌段共聚物的加工、结构和性能

Polymer Photochemistry Pub Date : 1986-01-01 DOI: 10.1016/0144-2880(86)90043-6

T.J. Henman

引用次数: 0

Dye-sensitized photopolymerization: II—Photopolymerization of methyl methacrylate initiated by a Crystal Violet-ascorbic acid system in aqueous solution 染料敏化光聚合:由结晶紫-抗坏血酸体系在水溶液中引发的甲基丙烯酸甲酯的光聚合

Polymer Photochemistry Pub Date : 1986-01-01 DOI: 10.1016/0144-2880(86)90038-2

Subasini Lenka, Padma L. Nayak, Indu B. Mohanty

引用次数: 0

Colour difference analysis of lightfastness for some vat dyes 几种还原染料耐光性的色差分析

Polymer Photochemistry Pub Date : 1986-01-01 DOI: 10.1016/0144-2880(86)90040-0

S. Shakra, Moustafa Ibrahim, A.B. Amera

引用次数: 4

Recent advances in liquid crystalline polymers 液晶聚合物的最新进展

Polymer Photochemistry Pub Date : 1986-01-01 DOI: 10.1016/0144-2880(86)90041-2

Jan F. Rabek

引用次数: 1

Polymer photophysics. Luminescence, energy migration and molecular motion in synthetic polymers 聚合物photophysics。合成聚合物中的发光、能量迁移和分子运动

Polymer Photochemistry Pub Date : 1986-01-01 DOI: 10.1016/0144-2880(86)90059-X

Norman S. Allen

引用次数: 0

Synthesis and photochemical properties of poly(1-(4-carboethoxyphenyl)-2-propen-1-one) 聚(1-(4-碳乙氧基苯基)-2-丙烯-1- 1)的合成及光化学性质

Polymer Photochemistry Pub Date : 1986-01-01 DOI: 10.1016/0144-2880(86)90024-2

Ivan Lukáč, Pavol Hrdlovič, James E. Guillet

{"title":"Synthesis and photochemical properties of poly(1-(4-carboethoxyphenyl)-2-propen-1-one)","authors":"Ivan Lukáč, Pavol Hrdlovič, James E. Guillet","doi":"10.1016/0144-2880(86)90024-2","DOIUrl":"10.1016/0144-2880(86)90024-2","url":null,"abstract":"<div>New light-sensitive polymer, poly(1-(4-carboethoxyphenyl)-2-propen-1-one), <math><mtext>M</mtext><msub><mi></mi><mn>w</mn></msub><mtext> = 1·3 × 10</mtext><msup><mi></mi><mn>6</mn></msup></math> Dalton, <math><mtext>M</mtext><msub><mi></mi><mn>w</mn></msub><mtext>M</mtext><msub><mi></mi><mn>n</mn></msub><mtext> = 2·6</mtext></math>, was prepared. On the basis of fractions prepared by photolysis, Mark-Houwink coefficients (α=0·79 ± 0·02 and K=(2·41 ± 1·4) × 10−3) were determined in chlorobenzene at 25°C employing low-angle laser light scattering and automatic viscometry. Quantum yield of main chain scissions (The Norrish Type II Reaction) was 0·45 in benzene solution under 366 nm radiation at room temperature. The Stern-Volmer constant for quenching of photolysis by naphthalene in benzene was 171 mol−1 and 63 mol−1 by 2,5-dimethyl-2,4-hexadiene in chloroform. The OO band of phosphorescence (438 nm) of the polyketone prepared was bathochromically shifted in comparison with poly(1-phenyl-2-propen-1-one), λmax• = 409 nm. The transient spectrum measured by laser flash photolysis exhibited a maximum at 350 nm with a lifetime of 150 ns. The bimolecular quenching rate constant (kq) for 2,5-dimethyl-2,4-hexadiene in chloroform was 5·57 × 108 dm3 mol−1 s−1. This value agrees well with kq = 4·2 × 108 dm3 mol−1 s−1. based on the Stern-Volmer constant of photolysis quenching and lifetime estimated by laser flash photolysis.</div>","PeriodicalId":101036,"journal":{"name":"Polymer Photochemistry","volume":null,"pages":null},"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)90024-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84823801","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: 4

Photopolymerization of acrylonitrile and methyl methacrylate induced by triphenylamine 三苯胺诱导丙烯腈与甲基丙烯酸甲酯的光聚合

Polymer Photochemistry Pub Date : 1986-01-01 DOI: 10.1016/0144-2880(86)90047-3

Hitoshi Kubota, Yoshitaka Ogiwara

{"title":"Photopolymerization of acrylonitrile and methyl methacrylate induced by triphenylamine","authors":"Hitoshi Kubota, Yoshitaka Ogiwara","doi":"10.1016/0144-2880(86)90047-3","DOIUrl":"10.1016/0144-2880(86)90047-3","url":null,"abstract":"<div>The photopolymerization of acrylonitrile and methyl methacrylate in the presence of triphenylamine (TPA) has been performed at 30°C in N,N-dimethylformamide and dimethylsulfoxide under irradiation with light of λ > 300 nm. TPA proved to be very effective for the polymerization of both monomers. An apparent activation energy of 4·3 kcal/mol was recorded for the photopolymerization of acrylonitrile. Equations of polymerization derived from a kinetic study were as follows: <math><mtext>Rate of polymerization=K[TPA]</mtext><msup><mi></mi><mn><mtext>1</mtext><mtext>2</mtext></mn></msup><mtext>[Monomer]</mtext><msup><mi></mi><mn>1·0</mn></msup></math><math><mtext>Degree of polymerization=K′[TPA]</mtext><msup><mi></mi><mn><mtext>−</mtext><mtext>1</mtext><mtext>2</mtext></mn></msup><mtext>[Monomer]</mtext><msup><mi></mi><mn>1·0</mn></msup></math> From the UV spectrum of photoirradiated TPA in N,N-dimethylformamide solution, the formation of N,N-diphenylamine and aniline was observed, in which the photodecomposition of TPA might result.Based on these results, it was suggested that radicals formed in the process of photodecomposition of TPA are responsible for the initiation of the photopolymerization, which proceeds through an ordinary mechanism of radical polymerization.</div>","PeriodicalId":101036,"journal":{"name":"Polymer Photochemistry","volume":null,"pages":null},"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)90047-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89365045","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: 4

Integration of fundamental polymer science and technology 基础高分子科学与技术的整合

Polymer Photochemistry Pub Date : 1986-01-01 DOI: 10.1016/0144-2880(86)90021-7

N.S. Allen

引用次数: 1

Octene-1 linear low density polyethylene photooxidation 辛烯-1线性低密度聚乙烯光氧化

Polymer Photochemistry Pub Date : 1985-01-01 DOI: 10.1016/0144-2880(85)90042-9

Elisabeth Fanton , Bernard Pellereau , René Arnaud , Jacques Lemaire

引用次数: 8