مروری بر خواص فیزیکی و مکانیکی اسفنج EVA/NR

نوع مقاله : تالیفی

نویسندگان

1 گروه پلیمر، پژوهشکده مهندسی کامپوزیت، مجتمع دانشگاهی مواد و فناوری ساخت، دانشگاه صنعتی مالک اشتر

2 پژوهشکده مهندسی کامپوزیت-مجتمع دانشگاهی مواد و فناریهای ساخت-دانشگاه صنعتی مالک اشتر-تهران-ایران مدیر و هیئت علمی پژوهشکده مهندسی

10.22063/basparesh.2024.3635.1697

چکیده

اسفنج های پلیمری، مواد متخلخلی هستند که درون ساختار آن ها تعداد زیادی منافذ ریز هوا وجود دارد. از میان انواع مختلف این اسفنج ها، اسفنج اتیلن وینیل استات (EVA) به عنوان یکی از کاربردی ترین آن ها در صنایع مختلف چون بسته بندی، کفش، خودروسازی و ضربه گیرها استفاده می شود. خواص فیزیکی و مکانیکی اسفنج های EVA متأثر از تغییرات ساختار سلولی، غلظت و نوع عوامل اتصال عرضی و پف زا، پارامترهای فرایند و سایر عوامل است. برای دستیابی به خواص مطلوب در این اسفنج ها، امکان ترکیب آن ها با سایر لاستیک ها وجود دارد. ترکیب دو یا چند پلیمر به منظور تولید محصولی با خواص مورد نیاز برای مصارف خاص، اهمیت زیادی در صنعت پیدا کرده است. لاستیک طبیعی (NR) به دلیل استحکام کششی زیاد، انعطاف پذیری مناسب در دماهای کم، جهندگی عالی، مقاومت دربرابر تغییر شکل دائمی و استحکام پارگی مناسب، می تواند با موفقیت با EVA ترکیب شده و اسفنج هایی با اندازه سلولی یکنواخت و عملکرد فیزیکی و مکانیکی مطلوب ایجاد کند. امروزه، تهیه اسفنج های EVA/NR و ترکیب آن ها با سایر مواد پلیمری، به یکی از موضوعات مهم در پژوهش های پلیمری تبدیل شده است تا عملکرد آن ها را در شرایط مختلف بهبود بخشد. در این مقاله، عوامل مؤثر و اثر آن ها بر  خواص اسفنج های EVA/NR، ازجمله خواص فیزیکی، مکانیکی و ساختاری به طور جامع مرور شده است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

A Review of the Physical and Mechanical Properties of EVA/NR Foam

نویسندگان [English]

  • Sajjad Darreh Khandan 1
  • mahmoud razavi zadeh 1
  • Mohammad Reza Pourhosseini 2
  • Mohammad Khabiri 1
  • Milad Saadat Taghroodi 1
1 Department of Materials Science and Manufacturing Technology, Malek Ashtar University of Technology
2 Polymer Departmenr, Composite Research Center, Material and Manufacturing Process Faculty, Malek Ashtar university, Tehran, Iran
چکیده [English]

Polymer foams are porous materials that have a large number of tiny air pores in their structure. Among the different types of these foams, ethylene vinyl acetate (EVA) foam is one of the most widely used in various industries such as packaging, shoes, automotive, and bumpers. The physical and mechanical properties of EVA foams are affected by changes in cell structure, concentration, type of crosslinking and blowing agents, process parameters, and other factors. To achieve the desired properties in these foams, it is possible to combine them with other rubbers. Combining two or more polymers in order to produce a product with the required properties for specific uses has gained great important in the industry. Due to its high tensile strength, good flexibility at low temperatures, excellent resilience, resistance to permanent deformation, and good tear strength, natural rubber (NR) can be successfully blended with EVA to form foams with uniform cell size and favorable physical and mechanical performance. Nowadays, the preparation of EVA/NR foams and blending them with other polymer materials have become one of the important topics in polymer research to improve their performance under various conditions. In the present paper, the effective factors and their effects on the properties of EVA/NR foams, including physical, mechanical, and structural propertie are comprehensively reviewed.

کلیدواژه‌ها [English]

  • Ethylene vinyl acetate
  • natural rubber
  • Foam
  • EVA/NR Foam
  • physical and mechanical properties

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