EFFECT OF SOFT SEGMENT CHEMISTRY ON THE BIOSTABILITY OF SEGMENTED POLYURETHANES .1. INVITRO OXIDATION

被引：125
作者：
TAKAHARA, A
COURY, AJ
HERGENROTHER, RW
COOPER, SL
机构：
[1] UNIV WISCONSIN, DEPT CHEM ENGN, 1415 JOHNSON DR, MADISON, WI 53706 USA
[2] MEDTRONIC INC, CORP CTR, MINNEAPOLIS, MN 55432 USA
来源：
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH | 1991年 / 25卷 / 03期
关键词：
D O I：
10.1002/jbm.820250306
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
A series of segmented polyurethanes (SPUs) containing various polyol soft segments was prepared and their resistance to oxidative degradation was investigated after aging in AgNO3 solution. The SPU with the polyether soft segment showed a large reduction in mechanical strength after exposure to the oxidative environment. Surface cracking was often observed for these specimens. XPS measurements revealed that scission of the ether linkage occurs upon oxidation. The oxidative resistance of SPUs containing aliphatic hydrocarbon soft segments was significantly improved over the poly-(tetramethylene oxide) (PTMO) based polyurethane.
引用
收藏
页码：341 / 356
页数：16
相关论文
共 18 条
12