Studi awal prinsip cascade engineering pada pembuatan pp-clay nano-komposit berbasis organo layered silicates (OLS) tanpa gugus OH terhadap sifat kuat tarik = Initial study of pp-clay nanocomposite fabrication by cascade engineering principle using organo layered silicates (ols) without oh group towards the tensile strength (Fakultas Teknik Universitas Indonesia, 2007)