Fatigue testing of implantable specimens: Effect of sample size and branching on the dynamic fatigue properties of polyisobutylene-based biomaterials

被引：20

作者：

Puskas, Judit E. ^{[1
]}

Dos Santos, Lucas M. ^{[1
]}

Fischer, Frank ^{[2
]}

Goetz, Christian ^{[2
]}

El Fray, Miroslawa ^{[4
]}

Altstaedt, Volker ^{[2
]}

Tomkins, Matthew ^{[3
]}

机构：

[1] Univ Akron, Goodyear Polymer Ctr, Dept Polymer Sci, Akron, OH 44325 USA

[2] Univ Bayreuth, Dept Polymer Engn, D-95447 Bayreuth, Germany

[3] Univ Western Ontario, Dept Chem Engn, London, ON, Canada

[4] Tech Univ Szczecin, Inst Polymer, Div Biomat & Microbiol Technol, PL-70322 Szczecin, Poland

来源：

POLYMER | 2009年 / 50卷 / 02期

基金：

美国国家科学基金会;

关键词：

Poly(styrene-b-isobutylene-b-styrene) SIBS; Long chain branching; In vitro tensile testing; MULTIBLOCK THERMOPLASTIC ELASTOMERS; SIMULATED BODY-FLUID; CRACK PROPAGATION; BLOCK-COPOLYMERS; BEHAVIOR; POLYSTYRENE; CORROSION;

D O I：

10.1016/j.polymer.2008.10.061

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In this paper we present the first results on the effect of specimen size and branching on the fatigue properties of polyisobutylene-based thermoplastic elastomers measured by the hysteresis method. It was verified that smaller specimens were inherently stronger as expected; at the same loading rate microdumbbells induced higher strain rates so they can be considered as the "worst case" scenario. Microdumbbells, which can be implanted into small animals for in vivo studies, were used for dynamic fatigue testing of linear poly(styrene-b-isobutylene-b-styrene) triblock copolymers (L_SIBS) in comparison with long-chain branched (tree-like or dendritic) versions (D_SIBS). In dynamic stress relaxation studies, D_SIBS performed better than L_SIBS. Simulated physiological conditions had negligible effect on the dynamic properties. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：591 / 597

页数：7

共 9 条

[1] The effect of carbon black reinforcement on the dynamic fatigue and creep of polyisobutylene-based biomaterials
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