نوع مقاله : مقاله پژوهشی

نویسندگان

1 مربی، شیمی، پژوهشگاه پلیمر و پتروشیمی ایران، تهران، ایران

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

3 کارشناسی ارشد، مهندسی پلیمر، پژوهشگاه پلیمر و پتروشیمی ایران، تهران، ایران

چکیده

در پژوهش حاضر، اثر لاستیک مایع کوپلیمر بوتادی‌ان آکریلونیتریل با گروه‌های انتهایی کربوکسیل و اختصار CTBN و عامل پخت دی‌آمین انعطاف‌پذیر (جف‌آمینD-400) به‌طور مجزا بر خواص پیش آغشته های رزین اپوکسی برپایه دی‌گلیسیدیل اتر بیسفنول A و عامل پخت دیسیان دی آمید (Dicy) تقویت شده با الیاف شیشه مطالعه شده است. بدین منظور، خواص پیش‌آغشته های شیشه-اپوکسی مانند جریان پذیری، استحکام برشی پیش‌آغشته و استحکام برشی بین‌لایه‌ای مطالعه شد. از اینرو، درصد مواد فرار، درصد رزین و میزان پیش پخت در پیش‌آغشته‌ها ارزیابی شد. نتایج نشان داد، در تمام نمونه‌های حاوی لاستیک مایع CTBN و عامل پخت جف‌آمین تقریباً مقادیر درصد رزین، درصد مواد فرار و میزان پیش پخت با یکدیگر برابر بود و مقدار جریان‌پذیری با افزودن مقادیر مختلف لاستیک مایع و عامل پخت جف‌آمین تغییر چندانی نکرد. مقدار استحکام برشی با افزودن لاستیک مایع تا phr20 تغییر چندانی نداشته. اما، افزودن عامل پخت جف آمین به مقدار %20 سبب افزایش %8 استحکام برشی شد و افزودن بیشتر آن تا %40 اثر قابل توجهی بر استحکام برشی نداشت. افزودن لاستیک مایع تا phr 5 سبب افزایش استحکام برشی بین لایه ای به مقدار %7/7 شد، ولی در تمام نمونه‌های حاوی جف‌آمین استحکام برشی بین‌لایه‌ای از MPa 6/4 برای سامانه اپوکسی حاوی %100 عامل پخت دیسیان دی آمید به مقدار MPa 0/2 برای سامانه حاوی %60 عامل پخت جف‌آمین کاهش و سپس تا مقدار MPa 6/2 برای سامانه اپوکسی حاوی %100 عامل پخت جف‌آمین افزایش یافت.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of CTBN liquid rubber and flexible diamine curing agent on epoxy/glass prepregs properties

نویسندگان [English]

  • Hajar Jamshidi 1
  • Mohammad Hosain Beheshty 2
  • Reza Akbari 3

1 Iran Polymer and Petrochemical Institute, Tehran, Iran

2 Iran Polymer and Petrochemical Institute, Tehran, Iran

3 Iran Polymer and Petrochemical Institute, Tehran, Iran

چکیده [English]

Glass/epoxy prepregs are widely used in composite industry. Although they have significant advantages, the brittleness nature of its epoxy matrix produces some difficulties. In this paper the effect of liquid carboxyl-terminated butadiene-acrylonitrile rubber (CTBN) and a flexible diamine (Jeffamine D-400) curing agent on epoxy prepregs based on diglycidyl ether of bisphenol-A (DGEBA) resin and dicyandiamide (Dicy) reinforced with glass fiber were studied. For this purpose, after preparing the resin formulation and its impregnation with glass fiber or preparing the prepreg samples, the effect of CTBN and Jeffamine on epoxy/glass prepregs properties like resin flow, lap shear strength (LSS) and interlaminar shear strength (ILSS) were studied. Volatile content, resin content and pre-curing of prepared prepregs are characterized. Results show that in all samples the amount of resin content, volatile content and pre-curing were nearly the same and adding different amounts of CTBN or Jeffamine do not changed the resin flow. By adding 20 phr of liquid rubber, LSS does not changed but, adding the Jeffamine up to 20% increased the LSS by 8% and adding Jeffamine up to 40% does not changed this property. By adding the CTBN by 5 phr, the ILSS increased by 7.7% and in all Jeffamine samples the ILSS varied from 4.6 MPa for 100% Dicy to 2.0 MPa for sample containing 60% of Jeffamine and 2.6 MPa for 100% of Jeffamine content.

کلیدواژه‌ها [English]

  • Epoxy/Glass prepreg
  • Epoxy resin
  • CTBN
  • Jeffamine
  • Shear strength
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