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Abstrak :
Nanokomposit polimer-clay merupakan bahan dengan matrik polimer yang diperkuat dengan nanofiller seperti lapisan silika. Pada penelitian ini pembuatan nanokomposit diawali dengan pembuatan masterbatch organo clay dengan penggunaan pelarut kemudian dicampur dengan polimer. Masterbatch dalam penelitian ini dihasilkan dari pencampuran Organo Layered Silicate (OLS), Ethylene Glycol, dan Polypropylene grafted maleic An hydride (PP-g-MA). Pembuatan nanokomposit polipropilen clay dilakukan di dalam mesin Rheomex (twin screw extruder) dengan mencampur masterbatch dan PP. Pengujian material yang dilakukan adalah pengujian XRD, TEM, HDT, dan uji tarik. Hasil yang diperoleh pada pengukuran HDT menunjukkan kenaikan sebesar 22 % pada komposit OLS Nanomer I.44PT dibanding dengan nilai HDT PP murni. Modulus elastisitas menunjukkan kenaikan sebesar 36 % pada komposit OLS DTDA dibanding dengan PP murni. ......Polimer - clay nanocomposite is a material with a polimer matrix which is toughened by nanofiller such as silica particles. In this research,, nanocomposite was prepared from the production of organoclay masterbatch through a mixture of a solvent and a polymer. The masterbatch were produced from a mixture of organo layered silicate (OLS), Ethylene Glycol, and Polypropylene grafted maleic An hydride (PP-g-MA). The production of PP clay nanocomposite was done in Rheomex machine (twin screw extruder) by mixing the masterbatch and PP. The materials evaluated were using XRD, TEM, HDT, and tensile test. The results of HDT measurement showed that the OLS Nanomer composites were 22 % higher compared to the pristine PP. The modulus of elasticity of OLS ? DTDA composites increased 36 % compared to the pristine PP.

Abstrak :
Joint sealant is used for concrete pavement joints. To fulfill jpint sealant requirements, laboratory tests have been carried out except weathering test, therefore for this purpose, experiments by simulation on concrete pavement is required in order to conform to all requirements for use in sealing joints in concrete pavements...

Abstrak :
Preparasi nanokomposit masterbatch pati/organoclay digunakan sebagai bahan pencampur pembuatan plastik kemasan yang bersifat biodegradable. Masterbatch tersusun atas pati singkong (tapioka), organoclay (montmorillonite), dan bahan aditif (plasticizer dan compatibilizer). Proses sintesis dengan metode melt compounding (pencampuran lelehan) yang dilakukan menggunakan alat Rheomix mixer. Untuk mendapatkan masterbatch optimum, struktur dan morfologi dari masterbatch diamati menggunakan Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD) dan Differential Scanning Calorimetry (DSC). Bahan aditif gliserol monostearat (GMS) dan gum rosin (GR) dapat mempengaruhi perbedaan pembentukan thermoplastic starch (TPS) yang menjadi matriks dari masterbatch. Penggunaan GMS sebagai aditif dengan konsentrasi pati sebesar 36% (wt) menunjukkan morfologi permukaan yang paling homogen, pati mengalami destrukturasi menjadi TPS secara merata, menghasilkan penurunan basal spacing menjadi 2,04 nm dan terbentuk struktur interkalasi. Penggunaan GR sebagai aditif dengan konsentrasi pati yang sama, menunjukkan morfologi permukaan yang kurang homogen, tidak semua pati mengalami destrukturasi dan peningkatan basal spacing organoclay sebesar 3,89 nm serta terbentuk struktur eksfoliasi. Selain itu, peningkatan konsentrasi pati juga memberikan pengaruh terhadap morfologi masterbatch. Semakin banyak konsentrasi pati, morfologi dari masterbatch semakin tidak homogen. ......Preparation of nanocomposite masterbatch starch / organoclay were used as biodegradable mixed materials on the manufacturing of plastic packaging. Masterbatch consist of cassava starch, organoclay (montmorillonite), and additives (plasticizer and compatibilizer). The synthesis process by melt compounding using a Rheomix mixer. To obtain optimum structure and morphology of the masterbatch were observed using Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD) and Differential Scanning Calorimetry (DSC). The Additives glycerol monostearate (GMS) and gum rosin (GR) can influenced the differences in the homogeneous of thermoplastic starch (TPS) as a matrix of the masterbatch. The using of GMS as an additive with a 36% (wt) concentration of starch showed the most homogeneous surface morphology, destructuring of starch into TPS homogeneously, the basal spacing of organoclay was decreased into 2.04 nm and obtain intercalated structure. The using of GR as an additive with the same concentration of starch, showed a less homogeneous surface morphology, destructuring of starch into TPS is not homogeneous, increased basal spacing to 3.89 nm and obtain exfoliated structure. Furthermore, the increased starch concentrations was also influence on the morphology of masterbatch. Increased of starch concentration caused the non homogeneous morphology of the masterbatch.