Experimental investigation on ۴D printing of PET-G
سال انتشار: 1401
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 140
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شناسه ملی سند علمی:
ISME30_500
تاریخ نمایه سازی: 29 خرداد 1401
چکیده مقاله:
In this work, for the first time, PET-G commercial filament is employed for ۴D printing of novel shape memory polymer (SMP). PET-G was found to be an amorphous SMP with net points of tight-knitted physical entanglements decelerating the stress relaxation. Printing parameters had a significant effect on the self-morphing behavior as well as shape and stress recovery. Birefringence studies using polarized light microscopy (PLM) revealed that the fused deposition modeling (FDM) process induces a higher pre-strain in the bottom layers than in the top ones, resulting in a downward self-bending. It was revealed that lower printing temperatures and higher printing speeds enhance the self-bending and shape recovery characteristics. All shape fixity ratios were higher than ۸۲%, with a maximum of ۹۵.۸۳% for samples printed with ± ۴۵ raster angles. The sample with the highest self-bending exhibited the maximum recovered stress of ۱.۲۴ MPa.
کلیدواژه ها:
نویسندگان
Elyas Soleyman
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
Davood Rahmatabadi
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
Majid Baniassadi
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
Mostafa Baghani
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran