Glass transition and structural relaxation of nano-particle aggregates of atactic poly(methyl methacrylate) formed in microemulsions

被引：19

作者：

Li, L

Li, B

Chen, JL

Zhou, DS

Xue, G

Liu, XN

机构：

[1] Nanjing Univ, Coll Chem & Chem Engn, Dept Polymer Sci & Engn, Nanjing 210093, Peoples R China

[2] Nanjing Univ Technol, Coll Chem & Chem Engn, Nanjing 210009, Peoples R China

来源：

POLYMER | 2004年 / 45卷 / 08期

基金：

中国国家自然科学基金;

关键词：

atactic poly(methyl methacrylate); microemulsion; glass transition;

D O I：

10.1016/j.polymer.2004.02.021

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Atactic poly(methyl methacrylate) (a-PMMA) nano-particles were prepared in three-component microemulsions using the cationic surfactant cetyltrimethylammonium bromide. To analyze the thermal history, the sub-T-g annealed sample was subsequently measured at a faster heating rate. The a-PMMA prepared in microemulsions shows higher glass transition and higher structural relaxation than those of bulk sample of the same tacticity and the same molecular weight. When the annealing time is longer, additional enthalpy relaxation and glass transition were observed at higher temperatures due to partial self-aggregation of a-PMMA chains, which was proved by spectroscopic studies. (C) 2004 Published by Elsevier Ltd.

引用

收藏

页码：2813 / 2816

页数：4

相关论文

共 28 条

[1] POLYMERIZATION IN MICROEMULSION .2. SURFACE CONTROL AND FUNCTIONALIZATION OF MICROPARTICLES [J].

ANTONIETTI, M ;

LOHMANN, S ;

VANNIEL, C .

MACROMOLECULES, 1992, 25 (03) :1139-1143

[2] POLYMERIZATION IN MICROEMULSIONS OF NATURAL SURFACTANTS AND PROTEIN FUNCTIONALIZATION OF THE PARTICLES [J].

ANTONIETTI, M ;

BASTEN, R ;

GROHN, F .

LANGMUIR, 1994, 10 (08) :2498-2500

[3] EFFECTS OF ANNEALING AND PRIOR HISTORY ON ENTHALPY RELAXATION IN GLASSY-POLYMERS .1. EXPERIMENTAL-STUDY ON POLYVINYL-CHLORIDE) [J].

BERENS, AR ;

HODGE, IM .

MACROMOLECULES, 1982, 15 (03) :756-761

[4] THERMOREVERSIBLE GELATION OF SOLUTIONS OF SYNDIOTACTIC POLY(METHYL METHACRYLATE) IN TOLUENE - A 2-STEP MECHANISM [J].

BERGHMANS, M ;

THIJS, S ;

CORNETTE, M ;

BERGHMANS, H ;

DESCHRYVER, FC ;

MOLDENAERS, P ;

MEWIS, J .

MACROMOLECULES, 1994, 27 (26) :7669-7676

[5] Effects of entanglement concentration on Tg and local segmental motions [J].

Bernazzani, P ;

Simon, SL ;

Plazek, DJ ;

Ngai, KL .

EUROPEAN PHYSICAL JOURNAL E, 2002, 8 (02) :201-207

[6] Spectroscopic study of ordered structures of atactic poly(methyl methacrylate) freeze-extracted from poly(ethylene glycol) solution [J].

Chen, JL ;

Zheng, GS ;

Xu, L ;

Zhang, J ;

Lu, Y ;

Xue, G ;

Yang, YS .

POLYMER, 2001, 42 (09) :4459-4462

[7] Confinement and processing effects on glass transition temperature and physical aging in ultrathin polymer films: Novel fluorescence measurements [J].

Ellison, CJ ;

Kim, SD ;

Hall, DB ;

Torkelson, JM .

EUROPEAN PHYSICAL JOURNAL E, 2002, 8 (02) :155-166

[8] POLYMERIZATION OF TETRAHYDROFURFURYL METHACRYLATE IN 3-COMPONENT ANIONIC MICROEMULSIONS [J].

FULL, AP ;

PUIG, JE ;

GRON, LU ;

KALER, EW ;

MINTER, JR ;

MOUREY, TH ;

TEXTER, J .

MACROMOLECULES, 1992, 25 (20) :5157-5164

[9] EFFECTS OF SURFACTANT CONCENTRATION ON POLYMERIZATIONS OF METHYL-METHACRYLATE AND STYRENE IN EMULSIONS AND MICROEMULSIONS [J].

GAN, LM ;

LEE, KC ;

CHEW, CH ;

NG, SC .

LANGMUIR, 1995, 11 (02) :449-454

[10] Stereocomplex formation in atactic poly(methyl methacrylate) I. Effect of solvents [J].

Gu, Q ;

Song, R ;

Shen, DY .

POLYMER BULLETIN, 2000, 44 (5-6) :533-538