Enthalpy relaxation at the glass transition in a side chain liquid crystal polymer for optical data storage

被引：3

作者：

Andreozzi, L ^{[1
]}

Faetti, M

Giordano, M

Hvala, M

Galli, G

Laus, M

机构：

[1] Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy

[2] INFM, Pisa, Italy

[3] Univ Pisa, Dipartimento Chim & Chim Ind, I-56100 Pisa, Italy

[4] Univ Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, I-15100 Alessandria, Italy

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2002年 / 372卷 / 372期

关键词：

side chain liquid crystal polymers; physical aging; enthalpy relaxation; differential scanning calorimetry;

D O I：

10.1080/10587250127598

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Physical aging of a side chain liquid crystal polymethacrylate is investigated by following the enthalpy recovery in DSC experiments after proper annealing procedures at temperatures below the glass transition. Data are analyzed according to a three-parameter model. The temperature dependence of the aging parameters is established and a comparison with data pertaining to PMMA is performed.

引用

收藏

页码：229 / 239

页数：11

相关论文

共 20 条

[1] EFFECT OF MOLECULAR-WEIGHT ON THERMAL PROPERTIES OF POLYCARBONATES [J].

ADAM, GA ;

HAY, JN ;

PARSONS, IW ;

HAWARD, RN .

POLYMER, 1976, 17 (01) :51-57

[2] MESOMORPHIC POLYACRYLATES CONTAINING ISOMERIC METHYL-SUBSTITUTED AZOBENZENE MESOGENS [J].

ANGELONI, AS ;

CARETTI, D ;

LAUS, M ;

CHIELLINI, E ;

GALLI, G .

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1991, 29 (13) :1865-1873

[3]

COWIE JMG, 1986, POLYM COMMUN, V27, P258

[4] PHYSICAL AGING STUDIES IN POLYMER BLENDS .2. ENTHALPY RELAXATION AS A FUNCTION OF AGING TEMPERATURE IN A POLYVINYL METHYL ETHER POLYSTYRENE BLEND [J].

COWIE, JMG ;

FERGUSON, R .

MACROMOLECULES, 1989, 22 (05) :2312-2317

[5] PHYSICAL AGING OF POLY(METHYL METHACRYLATE) FROM ENTHALPY RELAXATION MEASUREMENTS [J].

COWIE, JMG ;

FERGUSON, R .

POLYMER, 1993, 34 (10) :2135-2141

[6] PHYSICAL AGING STUDIES IN POLYVINYL METHYL-ETHER) .1. ENTHALPY RELAXATION AS A FUNCTION OF AGING TEMPERATURE [J].

COWIE, JMG ;

FERGUSON, R .

MACROMOLECULES, 1989, 22 (05) :2307-2312

[7] Molecular relaxation in a photosensitive liquid-crystalline polymeric glass former [J].

Cristofolini, L ;

Facci, P ;

Camorani, P ;

Fontana, MP .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1999, 11 (10A) :A355-A362

[8]

GOMEZRIBELLES JL, 1990, POLYMER, V31, P223

[9] EFFECTS OF ANNEALING AND PRIOR HISTORY ON ENTHALPY RELAXATION IN GLASSY-POLYMERS .2. MATHEMATICAL-MODELING [J].

HODGE, IM ;

BERENS, AR .

MACROMOLECULES, 1982, 15 (03) :762-770

[10] EFFECTS OF ANNEALING AND PRIOR HISTORY ON ENTHALPY RELAXATION IN GLASSY-POLYMERS .6. ADAM-GIBBS FORMULATION OF NONLINEARITY [J].

HODGE, IM .

MACROMOLECULES, 1987, 20 (11) :2897-2908