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521 research outcomes, page 1 of 53
  • publication . Article . 2012
    Open Access Persian
    Authors:
    Leila Sadat Ahmadi; Ahmad Reza Bahramian; Mehrdad Kokabi;
    Publisher: Iran Polymer and Petrochemical Institute

    Phase change materials (PCM) are substances with a high heat of fusion which, through melting and solidifying at certain temperatures, are capable to store or release a large amount of energy. This phenomenon can be utilized in designing heat protective materials as wel...

  • publication . Article . 2017
    Open Access Persian
    Authors:
    Sanazgoli Javanbakht Ghahfarokhi; Alireza Shakeri; Amir Zalnezhad;
    Publisher: Iran Polymer and Petrochemical Institute

    Because of wide applications of poly(ethylene oxide) (PEO) in various areas such as chemical, electrical and pharmaceutical industries, researchers have been focused to develop and improve the properties of this interesting polymer. To improve the mechanical and thermal...

  • publication . Article . 2017
    Open Access Persian
    Authors:
    Mohammad Reza Manafi; Pedram Manafi; Gholamreza Pircheraghi;
    Publisher: Iran Polymer and Petrochemical Institute

    Carbon nanotubes (CNTs) are a new class of nanomaterials that have gained special attention due to their unique properties such as excellent electrical and mechanical properties. Nanocomposite hydrogels, a novel category of hydrogels, have received great attention both ...

  • publication . Article . 2008
    Open Access Persian
    Authors:
    M.T. Azizi; F. Ganji; E. Vasheghani Farahani;
    Publisher: Iran Polymer and Petrochemical Institute

    Lactide was synthesized by reverse polymerization of low molecular weight poly(lactic acid) with two different molecular weights:1500 and 2500. Two different lactide purification processes such as: recrystallization in ethyl acetate and washing the crude lactide with et...

  • publication . Article . 2015
    Open Access Persian
    Authors:
    Khezrollah Khezri; Vahid Haddadi-Asl; Hossein Roghani-Mamaqani;
    Publisher: Iran Polymer and Petrochemical Institute

    Polystyrene/MCM–41 nanocomposites were synthesized by atom transfer radical polymerization (ATRP) at 110°C. Activators generated by electron transfer (AGET) and activators regenerated by electron transfer (ARGET), as two novel initiation techniques, for ATRP were used. ...

  • فرضیه: فرایند نورکاتالیزی به‌دلیل کانی‌زایی (معدنی‌شدن) کامل آلاینده‌ها و سازگاری با محیط زیست می‌تواند جایگزین مناسبی برای روش‌های متداول تصفیه پساب دارویی باشد. در این پژوهش، با توجه به ضعف‌های به‌کارگیری نانوذرات نورکاتالیزگر بر پایه TiO2 همچون انبوهش و مشکل جداسازی،...

  • publication . Article . 2013
    Open Access Persian
    Authors:
    M. Ehsani; M. Badripour; M.H.R. Ghoreishy;
    Publisher: Iran Polymer and Petrochemical Institute

    Improvements in the properties of ordinary sidewall compound (NR/BR) with the addition of EPDM by reactive processing method were evaluated. The results show that ozone resistance of these sidewalls was improved with increased addition of EPDM. Also the tensile strength...

  • publication . Article . 2019
    Open Access Persian
    Publisher: Iran Polymer and Petrochemical Institute

    فرضیه: مونومر متیل ‌‌استیرن از مشتقات استیرن است که از قرارگرفتن گروه متیل روی گروه بنزنی یا وینیلی به‌وجود می‌آید. پلی(‌متیل ‌استیرن) افزون بر خواص مشابه پلی‌استیرن دارای خواصی ویژه از جمله چگالی کمتر و دمای انتقال شیشه‌ای بیشتر نسبت به پلی‌استیرن است که محدوده دمای عم...

  • publication . Article . 2008
    Open Access Persian
    Authors:
    A.R. Ghasemi; M.M. Shokrieh;
    Publisher: Iran Polymer and Petrochemical Institute

    A new method for determination of residual stresses in the bottom layers of laminated composites is developed. In this method the residual stresses are determined by performing a consecutive drilling of laminated composites in the center of the rosette and recording the...

  • publication . Article . 2013
    Open Access Persian
    Authors:
    Hassan Arabi1; Matin Ghafari; Gholamhossein Zohuri; Saman Damavandi; Saeid Ahmadjo;
    Publisher: Iran Polymer and Petrochemical Institute

    The late transition metal catalysts based on end group of transition metals in the periodic table like Ni, Fe, Co, Pd, Pt were developed rapidly in polyolefin industrial productions. These metals with suitable ligands exhibited specific properties and appropriate activi...

521 research outcomes, page 1 of 53