Penelitian Pendidikan

Abstrak
ABSTRAK
Penelitian ini bertujuan untuk mempelajari pengaruh jumlah organoclay pada sintesa material nanokomposit epoxy-organoclay. Sintesa material nanokomposit dilakukan dengan dengan menggunakan metoda in situ polimerisasi. Jumlah organoclay divariasikan dari 1,3 wt.% sampai dengan 10,1 wt.%. Pengujian uji bending dilakukan dengan menggunakan standar ASTM D7264. Patahan hasil uji dianalisis dengan menggunakan scan electron microscope (SEM). Berdasarkan hasil uji bending, penambahan 1,3 wt% organoclay mengasilkan peningkatan nilai modulus sebesar 126%. Namun dengan kadar organoclay yang sama, terjadi penurunan kekuatan bending dan strain to failure yaitu sebesar 23% dan 44%. Berdasarkan pengujian SEM diketahui bahwa penurunan nilai bending strength dan stain to failure disebabkan oleh adanya void/bubble yang terperangkap di dalam material nanocomposit. Selain itu diketahui juga bahwa organoclay tidak terdispersi secara sempurna di dalam matriks epoxy.

Kata kunci: Nanokomposit, epoxy, organo clay, Bending test

ABSTRACT
This research aims to study the effect of the amount of organoclay in the synthesis of epoxy - organoclay nanocomposite materials . Synthesis of the nanocomposite material performed by using the in situ polymerization method . Amount of organoclay was varied from 1.3 wt . % To 10.1 wt . % . Testing bending test performed using the ASTM D7264 standard . Fault test results were analyzed by using a scanning electron microscope ( SEM ) . Based on the results of the bending test , the addition of 1.3 wt % organoclay generating an increase in the value of the modulus at 126 % . However, with the same levels of organoclay , a decline in bending strength and strain to failure is equal to 23 % and 44 % . Based on SEM testing is known that the bending strength impairment and failure to stain caused by the presence of voids / bubbles trapped inside the material nanocomposit . Also note also that the organoclay is not completely dispersed in the epoxy matrix .

Keywords : nanocomposite , epoxy , organo clay , Bending test