Double Glass Transitions and Interfacial Immobilized Layer in in-Situ-Synthesized Poly(vinyl alcohol)/Silica Nanocomposites

被引：111

作者：

Chen, Lin ^{[1
]}

Zheng, Kang ^{[1
]}

Tian, Xingyou ^{[1
]}

Hu, Kun ^{[1
]}

Wang, Ruoxi ^{[1
]}

Liu, Chen ^{[1
]}

Li, Yong ^{[2
]}

Cui, Ping ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Key Lab Mat Phys, Inst Solid State Phys, Hefei 230031, Peoples R China

[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China

来源：

MACROMOLECULES | 2010年 / 43卷 / 02期

关键词：

MOLECULAR-DYNAMICS; RELAXATION DYNAMICS; SEGMENTAL DYNAMICS; FILLED POLYMERS; CRYSTALLIZATION; BEHAVIOR; TEMPERATURE; MORPHOLOGY;

D O I：

10.1021/ma901267s

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The results of dynamic mechanical analysis (DMA) revealed that there were double tan 6 peaks in tile poly(vinyl alcohol)(PVA)/silica nanocomposite samples at low frequencies. The two relaxations attribute to glass transition for PVA matrix and motions of segments for PVA chains confined by the surface of silica nanoparticles, respectively. The thickness of the interfacial immobilized layer was calculated, and. schematic models were founded, which can well interpret tile results. The changes of the two relaxations with various silica contents at different frequencies are discussed. It is considered that most of the interfacial PVA chains probably span the two layers. The peak position of the first relaxation moves to high temperature With the increase of frequency for strain tag of the sample whereas tile second one shifts to low temperature for tile "drag effect" between the intrinsic and interfacial segments of the spanned PVA chains.

引用

页码：1076 / 1082

页数：7

共 41 条

[1] Effects of confinement on material behaviour at the nanometre size scale
Alcoutlabi, M
McKenna, GB
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2005, 17 (15) : R461 - R524
[2] Crystallization of polydimethylsiloxane: effect of silica filler and curing
Aranguren, MI
[J]. POLYMER, 1998, 39 (20) : 4897 - 4903
[3] The glass transition and interfacial layer in styrene-butadiene rubber containing silica nanofiller
Arrighi, V
McEwen, IJ
Qian, H
Prieto, MBS
[J]. POLYMER, 2003, 44 (20) : 6259 - 6266
[4] Glass-transition temperature behavior of alumina/PMMA nanocomposites
Ash, BJ
Siegel, RW
Schadler, LS
[J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2004, 42 (23) : 4371 - 4383
[5] Polymer-filler interactions in sol-gel derived polymer/silica hybrid nanocomposites
Bandyopadhyay, A
De Sarkar, M
Bhowmick, AK
[J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2005, 43 (17) : 2399 - 2412
[6] Computer simulations of supercooled polymer melts in the bulk and in-confined geometry
Baschnagel, J
Varnik, F
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2005, 17 (32) : R851 - R953
[7] Evidence for the shift of the glass transition near the particles in silica-filled elastomers
Berriot, J
Montes, H
Lequeux, F
Long, D
Sotta, P
[J]. MACROMOLECULES, 2002, 35 (26) : 9756 - 9762
[8] Molecular dynamics in nanostructured polyimide-silica hybrid materials and their thermal stability
Bershtein, VA
Egorova, LM
Yakushev, PN
Pissis, P
Sysel, P
Brozova, L
[J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2002, 40 (10) : 1056 - 1069
[9] Effect of silica nanoparticles on the local segmental dynamics in poly(vinyl acetate)
Bogoslovov, R. B.
Roland, C. M.
Ellis, A. R.
Randall, A. M.
Robertson, C. G.
[J]. MACROMOLECULES, 2008, 41 (04) : 1289 - 1296
[10] A molecular dynamics study of a model nanoparticle embedded in a polymer matrix
Brown, D
Mélé, P
Marceau, S
Albérola, ND
[J]. MACROMOLECULES, 2003, 36 (04) : 1395 - 1406

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