Evaluation of Topological Defects in Tetra-PEG Gels

被引：117

作者：

Akagi, Yuki ^{[1
]}

Matsunaga, Takuro ^{[2
]}

Shibayama, Mitsuhiro ^{[2
]}

Chung, Ung-il ^{[1
]}

Sakai, Takamasa ^{[1
]}

机构：

[1] Univ Tokyo, Sch Engn, Dept Bioengn, Bunkyo Ku, Tokyo 1138656, Japan

[2] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

来源：

MACROMOLECULES | 2010年 / 43卷 / 01期

关键词：

ANGLE NEUTRON-SCATTERING; ACTIVE NETWORK CHAINS; ELASTIC-MODULUS; POLY(DIMETHYLSILOXANE) NETWORKS; MECHANICAL-PROPERTIES; POLYMER GELS; SWOLLEN; EQUILIBRIUM; CYCLIZATION; HYDROGEL;

D O I：

10.1021/ma9019009

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We have investigated the topological defects in the Tetra-PEG gel formed from two symmetrical tetra-arm polymers. The concentration of the elastically effective chains (EEC) was estimated from the elastic moduli and the reaction efficiency Using the tree-like Miller-Macosko model. The concentration of EEC was in the range between the estimations of the affine and phantom theory. Furthermore, the formation of topological defects. especially entanglements and loops, was found to be negligible inthe Tetra-PEG gel, which differs from other conventional model networks. This extremely homogeneous Structure Was formed due to the unique impenetrable sphere-like behavior of the tetra-m-in star polymer in the semidilute Solution and the Unique symmetrical A-B type cross-end-coupling.

引用

页码：488 / 493

页数：6

共 30 条

[1] LARGE-SCALE HETEROGENEITIES IN RANDOMLY CROSS-LINKED NETWORKS [J].

BASTIDE, J ;

LEIBLER, L .

MACROMOLECULES, 1988, 21 (08) :2647-2649

[2]

De Gennes P.-G, 1979, Scaling concepts in polymer physics

[3] Effect of diluent on the gel point and mechanical properties of polyurethane networks [J].

Durackova, Andrea ;

Valentova, Helena ;

Duskova-Smrckova, Miroslava ;

Duseka, Karel .

POLYMER BULLETIN, 2007, 58 (01) :201-211

[4] CONCENTRATION OF ELASTICALLY ACTIVE NETWORK CHAINS AND CYCLIZATION IN NETWORKS OBTAINED BY ALTERNATING STEPWISE POLYADDITION [J].

DUSEK, K ;

VOJTA, V .

BRITISH POLYMER JOURNAL, 1977, 9 (02) :164-171

[5]

Dusek K, 1997, TRENDS POLYM SCI, V5, P268

[6] GRAPHLIKE STATE OF MATTER .10. CYCLIZATION AND CONCENTRATION OF ELASTICALLY ACTIVE NETWORK CHAINS IN POLYMER NETWORKS [J].

DUSEK, K ;

GORDON, M ;

ROSSMURPHY, SB .

MACROMOLECULES, 1978, 11 (01) :236-245

[7]

Ferry J. D., 1980, VISCOELASTIC PROPERT, V3rd ed.

[8] STATISTICAL THERMODYNAMICS OF RANDOM NETWORKS [J].

FLORY, PJ .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1976, 351 (1666) :351-380

[9] MOLECULAR-STRUCTURE AND ELASTIC BEHAVIOR OF POLY(ETHYLENE OXIDE) NETWORKS SWOLLEN TO EQUILIBRIUM [J].

GNANOU, Y ;

HILD, G ;

REMPP, P .

MACROMOLECULES, 1987, 20 (07) :1662-1671

[10] Model networks based on 'endlinking' processes: Synthesis, structure and properties [J].

Hild, G .

PROGRESS IN POLYMER SCIENCE, 1998, 23 (06) :1019-1149

← 1 2 3 →