کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5181544 1380965 2013 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A self-healing particulate composite reinforced with strain hardened short shape memory polymer fibers
ترجمه فارسی عنوان
یک کامپوزیت ذره ای به خودی خود بهبود می بخشد و با الیاف پلیمری کم حافظه مقاوم شده است
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی

A particulate composite dispersed with thermoplastic particles and strain hardened short shape memory polymer fibers was prepared to evaluate its ability to repeatedly heal wide-opened cracks per the two-step close-then-heal (CTH) self-healing scheme. A two-step coating approach was used to enhance the shape fixity and workability of the cold-drawn programmed short polyurethane fibers. The relationship between recovery-stress and recovery-strain was experimentally determined by partially constrained shape recovery test. Notched beam specimens were prepared and fracture-healing was conducted up to five cycles. It is found that the composite was able to heal the wide-opened crack repeatedly with considerable healing efficiency. It is also found that the healing efficiency increases as the fiber length increases, but in a reduced increasing rate. The recovery stress-recovery strain of the strain hardened shape memory polymer fiber behaves nonlinearly. The coated fiber is more effective than the uncoated fiber in closing wide-opened cracks when the recovery strain is within a certain range.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 54, Issue 18, 16 August 2013, Pages 5075–5086