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Register a new userEffect of addition Zinc Borate and Aluminum Hydroxide as flame retardants to Low Density polyethylene
دراسة تأثير بورات الزنك و هودروكسيد الألمنويم كمواد معيقة لاشتعال البولي ايتيلين منخفض الكثافة
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يهدف هذا البحث لدراسة تأثير بورات الزنك و هيدروكسيد الألمنيوم كمواد معيقة لاشتعال البولي ايتيلين منخفض الكثافة. تم تحضير العينات بطريقة الصب بالقالب. كشفت النتائج أن استبدال كمية محددة من هيدروكسيد الألمنيوم ببورات الزنك يؤدي إلى تحسين مقاومة انتشار اللهب في البولي ايتيلين منخفض الكثافة. كانت هذه التحسينات بشكل أساسي بسبب التأثير الإضافي لبورات الزنك على آلية الإعاقة الفيزيائية لهيدروكسيد الألمنيوم في كلا المرحلتين الغازية و الصلبة.
This research aims to study the effect of adding Zinc Borate and Aluminum Hydroxide as flame retardants to Low Density polyethylene. Specimens have been prepared through pouring them in a mold. Results have revealed that replacement of certain amount of Aluminum Hydroxide with Zinc Borate could lead to improving the resistance of flame spread in Low Density polyethylene. these improvements were basically due to further contribution of Zinc Borate to the physical barrier mechanism of Aluminum Hydroxide in both gas and solid phases.
References used
Seymour R.B., “Additives For Plastic” Academic Press, New York, 1, 1978
UK department of trade and industry consumer safety unit "Risk and benefits of flame retardant use in consumes products", 2002
Velasco I.J., Morhain C., Martinez B.A., Perez R.A.M., Saja a.J., “The effect of filler type, morphology and coating on the anisotropy and microstructure heterogeneity of injectionmoulded discs of polypropylene filled with aluminium and magnesium hydroxides. Part 2. thermal and dynamic mechanical properties” Polymer, 43, 2002,6813-6819
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additiv
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peroxide, and zinc stearate. The polymer blend LDPE/AD+S was prepared by extrusion, in
three compositions according to the percentage of starch (15,20,40%). Then, films were
prepared from the blend by thermal hydraulic compression to study their microstructure by
optical microscopic at magnification of 055 The results showed that the starch granules
were homogeneously distributed within the polymer matrix, and the compatibility
additives played an important role in enhancing the microstructure of the prepared blends.
The results also indicate that the starch promotes the onset of the bioegradation process.
The results showed the possibility of getting at a wide rang of board with different properties, and all investigated percentage had special properties which to use in industrial application, also the result showed the possibility to produce these bo
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The results showed the possibility of getting of a wide spectrum of boards with different properties, and all studied percentages had special properties which allow them to use in industrial application, also the result showed the possibility to produce these boards without treatment of the wood particles or without addition any virgin plastic to RLDPE
The aim of this work is to study the rheological and mechanical properties of Poly(lactic acid) and High density polyethylene and blends (PLA/HDPE) in the molten state with recpect to shear stress, temperature and blends compositions using brabender mixer.
هدفَ البحث إلى كشف احتمال حدوث هجرة متعاكسة بين المواد المضافة إلى البولي إيثيلـين عـالي
الكثافة المستخدم في صناعة عبوات تعبئة زيت الزيتون البكر و الزيت المعبـأ، و قـد صـممت التجربـة
بالاعتماد على حبيبات البولي إيثيلين من جهة للحصول على أعلى سطح تم
اس ممكن بزيـت الزيتـون،
و باستخدام نوعين منها أحدها أبيض اللون و الثاني أحمر، كما درس تأثير كل من زمـن التمـاس بـين
الحبيبات و الزيت و زمن تخزين الزيت من جهة أخرى. و لتحديد ما يجري فعلاً عند تخـزين الزيـت فـي
العبوات البلاستيكية بأبسط الطرائق، درس كل من رقم الحموضة، و رقم البيروكسيد، و لزوجـة الزيـت،
و كشف وجود مركبات الدايينات المهاجرة على موجة امتصاص UV)232nm) ، فضلاً عن دراسة العـد
الكلي للأحياء الدقيقة (لكشف احتمال وجود مثبطات نمو)، و الاختبارات الحسية. كما قيست إمكانية حدوث
هجرة للزيت إلى حبيبات البولي إيثيلين.
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