نوع مقاله : مقاله پژوهشی

نویسندگان

1 نشیار، مهندسی مکانیک، دانشگاه تربیت دبیر شهید رجایی، تهران ، ایران

2 استاد، مهندسی مواد، پژوهشگاه پلیمر و پتروشیمی، تهران، ایران

3 کارشناس ارشد، مهندسی مکانیک، دانشگاه تربیت دبیر شهید رجایی، تهران؛ ایران

چکیده

در این تحقیق، خواص مکانیکی، شامل مدول الاستیک، استحکام کششی و استحکام ضربه نانوکامپوزیت‌های بر پایه آلیاژ پلی‌پروپیلن و پلی‌اتیلن خطی با چگالی کم، در حضور نانوذرات اکسید تیتانیوم، به روش اختلاط مذاب در یک اکسترودر دو مارپیچه هم‌سوگرد تهیه گردید. بدین منظور، به ترتیب 0، 2 و 4 درصد وزنی نانو ذرات اکسید تیتانیوم به ترکیبات پایه پلی‌پروپیلن/پلی اتیلن خطی با چگالی کم با نسبت ثابت 60/40 درصد وزنی افزوده شده و ترکیبات نهایی تهیه شد. آزمون‌های کشش و ضربه به ترتیب برای تعیین مدول الاستیسیته، استحکام کششی و استحکام ضربه ترکیبات انجام شد. مشاهده شد که افزودن نانو ذرات اکسید تیتانیوم تا 2 درصد وزنی مدول الاستیسیته و استحکام ضربه نسبت به ترکیب پایه پلی‌پروپیلن/پلی‌اتیلن خطی با چگالی کم را افزایش می‌دهد اما تاثیر چندانی بر استحکام کششی ندارد. حضور بیش از 2 درصد وزنی نانو ذرات (تا 4 درصد وزنی) باعث کاهش خواص مذکور می‌شود. همچنین مشاهده گردید که حضور نانو ذرات با درصد وزنی کم (حدود 2 درصد وزنی)، تقریبا 7 درصد استحکام ضربه و مدول الاستیک ترکیبات را افزایش می‌دهد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

A study on effect of titanium dioxide nanoparticles on the elastic modulus, impact and tensile strengths of polypropylene/linear low density polyethylene (PP/LLDPE) blends

نویسندگان [English]

  • Faramarz Ashenai Ghasemi 1
  • Ismail Ghasemi 2
  • Sajjad Daneshpayeh 3

1 Faculty of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran

2 Department of polymer Engineering, Polymer and Petrochemical Institute (IPPI), Tehran, Iran

3 Faculty of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran

چکیده [English]

In this study, mechanical properties, including elastic modulus and impact strength of nanocomposites based on polypropylene and polyethylene, linear low-density blends, in the presence of titanium oxide nanoparticles have been studied. 0, 2 and 4 wt% titanium dioxide nanoparticles were added to the basic ingredients polypropylene / polyethylene linear low density with a fixed ratio of 60/40 wt. % to reach the final composition that was prepared using an extruder. Tensile and impact tests were carried out in order to determine the elastic modulus and impact strength of compounds. It was observed that the presence of titanium dioxide nanoparticles at 2 wt. %, elastic modulus and impact strength compared to the basic polypropylene/polyethylene linear low-density increase and the presence of higher level of titanium dioxide nanoparticles up to 4 wt. % decrease mechanical properties of compounds. It was also seen that usilng low weight percent of nano particles, increase impact strength of the samples up to 7 percenrt.

کلیدواژه‌ها [English]

  • Nanocomposite analytical
  • elastic modulus
  • Impact strength
  • Titanium dioxide
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