بهینه‌سازی خواص مکانیکی نانوکامپوزیت PVC/NBR/Graphene برای دستیابی به بیشینه استحکام کششی و ازدیاد طول در هنگام شکست

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه مهندسی مکانیک، دانشگاه شهید بهشتی، تهران، ایران

2 استادیار، گروه مهندسی مکانیک، دانشگاه شهید بهشتی، تهران، ایران

10.22034/ijme.2023.412811.1822

چکیده

در این پژوهش با استفاده از روش اختلاط مذاب، نانوکامپوزیت پلی وینیل کلراید (PVC) / نیتریل بوتادین رابر  (NBR)/ گرافن ساخته شد. برای بررسی تاثیر درصد وزنی الاستومر NBR و درصد وزنی نانوصفحات گرافن بر خواص مکانیکی (استحکام کششی و درصد ازدیاد طول در هنگام شکست) نانوکامپوزیت PVC/NBR/Graphene ، از روش رویه پاسخ (RSM) استفاده شد. با استفاده از جدول آنالیز واریانس برای خواص مکانیکی نانوکامپوزیت روابط ریاضی ارائه گردید و میزان تاثیر هر یک پارامترهای موادی بر خواص مکانیکی مورد بررسی قرار گرفت. مقایسه نتایج روابط ریاضی و نتایج تجربی خطای کمی را نشان داد. همچنین برای تایید نتایج خواص مکانیکی، ریز ساختار نمونه‌ها با استفاده از میکروسکوپ الکترونی (SEM) بررسی شد.  نتایج نشان داد با افزایش درصد وزنی نانوصفحات گرافن از 0 تا 2 درصد وزنی و کاهش NBR از 40 به 20 درصد وزنی در نانوکامپوزیت، استحکام کششی افزایش می‌یابد، درحالی که درصد ازدیاد طول در شکست کاهش پیدا می‌کند. با بهینه‌سازی خواص مکانیکی جهت داشتن همزمان بیشنه استحکام کششی (4/15مگاپاسکال) و بیشینه درصد ازدیاد طول در هنگام شکست (107/6درصد)، درصد وزنی نانوصفحات گرافن و NBR به ترتیب 0/81 و 35/18 درصد خواهد بود.

کلیدواژه‌ها

عنوان مقاله [English]

Optimizing the mechanical properties of PVC/NBR/Graphene nanocomposite for achieve maximum tensile strength and elongation at break

نویسندگان [English]

  • Mohammad Purhaji 1
  • Amir Hosein Hamdollahzade 1
  • Mohammad Reza Nakhaei 2
1 MSc Student, Department of Mechanical Engineering, Shahid Beheshti University, Tehran, Iran
2 Assistant Professor, Department of Mechanical Engineering, Shahid Beheshti University, Tehran, Iran
چکیده [English]

In this study, a nanocomposite based on polyvinyl chloride (PVC)/nitrile butadiene rubber (NBR)/Graphene nanoplates was prepared by melt mixing method. The response surface methodology (RSM) was employed to investigate the effect of weight percentages of NBR elastomer and graphene nanosheets on the mechanical properties (tensile strength and elongation at break) of the PVC/NBR/graphene nanocomposite. Mathematical relationships for the mechanical properties of the nanocomposite were presented using analysis of variance (ANOVA) table, and the degree of influence of each material parameter on the mechanical properties was studied. The comparison of mathematical relationships and experimental results showed low error. Additionally, the microstructure of the samples was examined using scanning electron microscope (SEM) to confirm the results. The results showed that by increasing the weight percentage of graphene nanosheets from 0 to 2% and decreasing NBR from 40 to 20% weight percentage in the nanocomposite, the tensile strength increases while the elongation at break decreases. By optimizing the mechanical properties to achieve maximum tensile strength (15.4 MPa) and maximum elongation at break (107.6%), the weight percentages of graphene nanosheets and NBR will be respectively 0.81 and 35.18%.

کلیدواژه‌ها [English]

  • Nanocomposite
  • Mechanical Properties
  • Polyvinyl Chloride
  • Nitrile Butadiene Rubber
  • Graphene

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