期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 139, 期 2, 页码 -出版社
WILEY
DOI: 10.1002/app.51466
关键词
mechanical properties; melt-mixing; morphology; oxidative; hydrolytic stability; polyisobutylene; thermoplastic polyurethane
资金
- Scientific Research Foundation from Qingdao University of Science Technology
High molecular weight polyisobutylene (PIB) was modified through a mild and easy melt-mixing process with thermoplastic polyurethane elastomer (TPU) in the presence of a compatibilizer, resulting in a significantly phase-separated morphology. The increase of TPU content led to an evolution from dispersed phase to continuous phase, enhancing the tensile strength of the blend. The blend exhibited improved thermal and oxidative/hydrolytic stability compared to TPU, with the surface chemical composition of the blend being tailored through annealing for enhanced biocompatibility and stability.
High molecular weight polyisobutylene (PIB) was modified by a mild and facile melt-mixing process with thermoplastic polyurethane elastomer (TPU) in the presence of a compatibilizer, i.e., polypropylene-g-maleic anhydride (PP-g-MAH). Scanning electron microscopy (SEM) in combination with solvent etching revealed a significantly phase-separated morphology due to different polarity of PIB and TPU. An evolution from dispersed phase to continuous phase for TPU was observed with the increase of TPU content, leading to an enhanced tensile strength of PIB/TPU blend in comparison to PIB. This phase-separated morphology of PIB/TPU blend was confirmed by FTIR and thermal analysis. Rheological studies suggested that the PIB/TPU blend (30 wt% of TPU) exhibited a typical non-Newtonian fluid behavior. More importantly, PIB/TPU blend was shown to possess enhanced thermal and oxidative/hydrolytic stability in comparison to TPU. SEM combined energy dispersive spectrometer (EDS) further elucidated that the surface chemical composition of PIB/TPU blend can be tailored through annealing, which further improved the biocompatibility as well as the oxidative/hydrolytic stability.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据