Effect of UV light scattering during photopolymerization on UV spectroscopy measurements

被引：16

作者：

Désilles, N ^{[1
]}

Gautrelet, C ^{[1
]}

Lecamp, L ^{[1
]}

Lebaudy, P ^{[1
]}

Bunel, C ^{[1
]}

机构：

[1] Inst Natl Sci Appl Rouen, Mat Macromol Lab, CNRS, UMR 6522, F-76131 St Aignan, France

来源：

EUROPEAN POLYMER JOURNAL | 2005年 / 41卷 / 06期

关键词：

RTUV spectroscopy; light scattering; photopolymerization;

D O I：

10.1016/j.eurpolymj.2004.12.019

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A photopolymerization reaction involving 2-hydroxyethylmethacrylate (HEMA), a hydroxytelechelic polybutadiene (HTPB) and 2,2-dimethyl-2-hydroxyacetophenone (Darocur 1173) as photoinitiator has been investigated by Real Time UV and Real Time IR spectroscopies. For this system, RTUV analyses are completely opposite to the expected curves, namely a decrease in the sample absorbance (photobleaching phenomenon). This apparent contradiction has been explained by a scattering phenomenon inside the sample, which can be linked to the formation of sub-structures that can create local fluctuations of refractive index during the polymerization. A four-flux theory, which takes into account the polymer absorption and scattering properties, has allowed us to describe the UV light intensity variation inside the sample. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：1296 / 1303

页数：8

共 14 条

[1] Photopolymerization of acrylates using N-aliphaticmaleimides as photoinitiators [J].

Clark, SC ;

Hoyle, CE ;

Jönsson, S ;

Morel, F ;

Decker, C .

POLYMER, 1999, 40 (18) :5063-5072

[2]

DANGOUX R, 1988, EUROTHERM, V4

[3]

DECKER C, 1988, MAKROMOL CHEM, V189, P2381

[4] Elaboration of gradient structure materials from homogeneous system combining UV and thermal processes [J].

Désilles, N ;

Lecamp, L ;

Lebaudy, P ;

Bunel, C .

POLYMER, 2004, 45 (05) :1439-1446

[5] Gradient structure materials from homogeneous system induced by UV photopolymerization [J].

Désilles, N ;

Lecamp, L ;

Lebaudy, P ;

Bunel, C .

POLYMER, 2003, 44 (20) :6159-6167

[6]

Gorodnichev E. E., 1995, Journal of Experimental and Theoretical Physics, V80, P112

[7]

Kerker M, 1969, SCATTERING LIGHT OTH

[8] TEMPERATURE DISTRIBUTION IN POLY(ETHYLENE-TEREPHTHALATE) PLATE UNDERGOING HEAT-TREATMENT - DIFFUSION INFLUENCE .1. THEORETICAL APPROACH [J].

LEBAUDY, P ;

SAITER, JM ;

GRENET, J ;

VAUTIER, C .

POLYMER, 1992, 33 (09) :1887-1892

[9] Influence of UV radiation wavelength on conversion and temperature distribution profiles within dimethacrylate thick material during photopolymerization [J].

Lecamp, L ;

Lebaudy, P ;

Youssef, B ;

Bunel, C .

POLYMER, 2001, 42 (21) :8541-8547

[10] 4-FLUX MODELS TO SOLVE THE SCATTERING TRANSFER EQUATION IN TERMS OF LORENZ-MIE PARAMETERS [J].

MAHEU, B ;

LETOULOUZAN, JN ;

GOUESBET, G .

APPLIED OPTICS, 1984, 23 (19) :3353-3362

← 1 2 →