مهندسی شیمی ایران

مهندسی شیمی ایران

ارتباط آرایش مارپیچ اکسترودر با خواص فیزیکی- مکانیکی و ساختاری تایرهای ضایعاتی واولکانیده

نوع مقاله : مقاله پژوهشی

نویسندگان
1 استادیار مهندسی شیمی، دانشگاه پیام نور، تهران، ایران
2 دانشجوی کارشناسی ارشد مهندسی شیمی، دانشگاه پیام نور، تهران، ایران
3 استادیار مهندسی شیمی، دانشگاه علم و صنعت، تهران، ایران
چکیده
یکی از نگرانکنندهترین چالش‌های قرن حاضر موضوع دفع تایرهای فرسوده است، که بازیابی آن‌ها با واولکانش می‌تواند راه حلی برای مشکلات زیستمحیطی حاصل از آن‌ها باشد. در این مقاله برای یافتن ارتباط میان آرایش مارپیچ و خواص نمونهها، اِلمانهایی با زوایا و برشهای گوناگون برای اکسترودر ساخته شدند. سپس پانزده نمونۀ لاستیکی در شرایط گوناگون فرایندی واولکانیده شدند و برروی هر کدام آزمون های فیزیکی- مکانیکی انجام گرفت تا مشخص شود که تحت چه شرایطی نمونههای واولکانیده از خواص مکانیکی مطلوبتری برخوردار خواهد بود. طی آزمونها مشخص شد که دما تأثیرگذارترین مشخصه در فرایند واولکانش خواهد بود. بهگونهای بیشترین درصد واولکانش در دماهای پایینتر و برشهای متوسط و زیاد حاصل شد؛ زیرا بالابودن میزان سل در این شرایط سبب افزایش فرایندپذیری نمونهها می‌شود. درحالیکه افزایش دما و کاهش نرخ برش، اثر منفی بر روند فرایند خواهد داشت. هم‌چنین در بین خواص بررسیشده تغییرات میزان سایش و جهندگی، مستقل از آرایش مارپیچ شناخته شدند.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Relationship between Screw Configuration and Physio-Mechanical and Structural Properties of Devulcanized Waste Tires

نویسندگان English

H. Yazdani 1
H. Fakhari 2
V. Garshasbi 3
1 Assistant Professor of Chemical Engineering, Payam Noor University, Tehran, Iran
2 M. Sc. Student of Chemical Engineering, Payam Noor University, Tehran, Iran
3 Assistant Professor of Chemical Engineering, Iran University of Science and Technology
چکیده English

One of the most concernative challenges of the current century is the disposal of waste tires; recycling them by devulcanization can be a solution to environmental problems. To find the relationship between the screw configuration and the properties of the samples, some new elements with different angles and shears were designed, and installed on the extruder. Then, 15 rubber samples were devulcanized by the extruder and Physical-mechanical tests were performed on them. To determine what process conditions will cause favorable mechanical properties in samples. During the tests, it was determined that temperature will be the most influential parameter in the devulcanization process. It was found that the highest percentage of devulcanization occurs at lower temperatures and medium and high shear rates. In this condition, the weight fraction of sol will be at its maximum value, which increases the processability of the samples. While increasing the temperature and decreasing the cutting rate cause a negative effect on the process. Among the investigated properties; the changes in abrasion and resilience were independent of screw configuration.

کلیدواژه‌ها English

Block Copolymer
Screw Configuration
Devulcanization
Extruder
Mechanical Properties
Worn Tires
Shear Rate
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