ارزیابی روش‌های بهبود ترشوندگی الیاف با رزین در فرایند ساخت پیش‌آغشته

نوع مقاله : تالیفی

نویسندگان

1 فارغ التحصیل کارشناسی ارشد دانشگاه صنعتی مالک اشتر

2 عضو هیئت علمی دانشگاه صنعتی مالک اشتر

چکیده

پیش‌آغشته ماده پیش‌مهندسی شده‌ای است که از آغشته‌سازی الیاف تقویت‌کننده با رزین ساخته می‌شود. ترشوندگی الیاف با رزین از پارامترهای کلیدی در فرایند ساخت پیش‌آغشته به‌شمار می‌رود، زیرا بر خواص مکانیکی پیش‌آغشته اثرگذار است. دو سازوکار اصلی برای افزایش ترشوندگی الیاف با رزین وجود دارد: تشکیل پیوند شیمیایی میان الیاف و رزین و دیگری، افزایش نفوذپذیری رزین و ایجاد گره‌خوردگی‌های مکانیکی میان رزین و الیاف. بر این اساس، برای دست‌یابی به هریک از این دو سازوکار روش‌های گوناگونی مانند اصلاح سطح الیاف تقویت‌کننده، تغییر یا اصلاح فرمول‌بندی رزین مصرفی، افزایش زمان تماس بین رزین و الیاف در حمام آغشته‌سازی و همچنین کاهش گرانروی رزین وجود دارد. در این مقاله، معایب و مزایای روش‌های یاد شده ارزیابی شده است. به‌طور کلی می‌توان گفت، ترشوندگی الیاف با رزین به تنهایی نمی‌تواند به عنوان هدف اصلی در فرایند ساخت پیش‌آغشته مطرح شود. زیرا بر اساس روش انتخابی برای افزایش ترشوندگی الیاف با رزین، امکان تغییر در سایر مشخصه‌های محصول پیش‌آغشته تولیدی مانند خواص مکانیکی، قیمت تمام شده، مدت زمان تولید و غیره وجود دارد. بنابراین، یافتن مقادیر بهینه برای متغیرهایی مانند ترشوندگی الیاف با رزین ضروری است.

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of Methods for improving the wetting of Fibers by the resin in Prepreg Manufacturing Process

نویسندگان [English]

  • Hamid khalafi 1
  • mehrzad mortezaei 2
1
2
چکیده [English]

Prepreg is a pre-engineered laminating material manufactured by impregnating a fiber-reinforcement with a resin. Wetting of fibers by the resin is one of the key parameters in prepreg manufacturing process, because of its contribution on the mechanical properties of the prepreg. It is worth mentioning that there are two main mechanisms for increasing the wetting of the fibers by the resin; the first one is through the formation of chemical bonds between the resin and fibers, and the second one is increasing the ability of resin to penetrate through the fibers and make mechanical entanglement between the resin and fibers. Various methods exist to achieve both these mechanisms, such as, surface modification of fibers, changing the resin formulation, increasing the contact time between resin and fibers, and reducing the viscosity of the resin. In this paper, advantages and disadvantages of the above-mentioned methods are evaluated. In general, it can be said that increasing the wetting of fibers by the resin alone cannot be considered as a target in prepreg manufacturing process, because in orderto improve the wetting of the fibers by the resin, there should be changes made in other conditions of the produced prepreg such as mechanical properties, final price, production time, etc..Therefore, finding the optimal values for the parameters like wetting of the fibers by the resin is essential.

کلیدواژه‌ها [English]

  • composite
  • prepreg
  • fibers
  • wetting
  • contact angle

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