Seenaa Ibrahim Hussein*, Nadia Abbas Ali, Harith Ibrahim Jaafar, Zaniab Raheem Muslem
Abstract
أستخدمت طريقة كيميائية هي طريقة الصل جل وهي ابسط الطرق في تحضير جسيمات والياف ومتراكبات نانوية ، بعد –
تحضير المتراكب الهجين مع الايبوكسي لتحسين الخصائص الميكانيكية والخصائص الحرارية ودراسة تأثير امتصاص
الماء على اختبار الانحناء والصلادة للمتراكب الهجيني TEOS مع الايبوكسي والايبوكسي المحضر بشكل متراكب هجيني
وتقطيعه حسب المواصفات الامريكية لفحص امتصاص الماء والانحناء ثلاثي الابعاد والصلادة
Abstract
Sol-gel method is the simplest method and has to preparation of nano particles, nano fibers, and nano flaks. The preparation of hybrid epoxy thermosets enables their improvement in characteristics such as mechanical properties (bending,and hardness), thermal properties. The effect of water absorption on bending and hardness test for tetraethylorthosilicate (TEOS) and epoxy hybrid have been investigated. TEOS with (0%,2%,4%,6%and 8%) volume percent-age mixed with epoxy to prepared sheets of hybrid, these sheets cut as samples for ASTM water absorption, bending and hardness tests.
The results show that, adding TEOS to epoxy will increase absorbance of water. bending test shows that there are increase in values of bending stress with increasing TEOS but after im-mersion in water all the values for bending stress will reduce. Hardnessvalues at least for the samples immersion in water from dry samples, occur the diffusion of molecules water in the polymer and hybrids leads to space molecular chains for each other and decrease the hardness values. Thermal stability of hybrids increase with increasing TEOS ratio, the glass and de-composition temperature were shift compare with epoxy pure.
سيناء ابراهيم حسين | Seenaa Ibraheim Hussein | 4750