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"PMMA is one of the main raw materials for the injection molding process in the lens industries. Since this process requires extremely careful techniques to obtain lens with the best quality, it leads to a high rate of product rejection. These rejected products do not only pose an issue for the industrial environment and require storage space,their price also falls significantly. Among the solutions to this problem is to reuse the rejected products as substitute materials for the manufacture of another product?s part such as lamp holders. This process reuses rejected PMMAcontaining products in the ABS base polymer industries so as to generate PMMA-containing products with better physical properties. In this experiment, 10 to 40 % (w/w) of rejected PMMA was blended with ABS resins. Themonomer content in the ABS resins was analyzed by NMR. Moreover, the mechanical, thermal, and morphological properties of the blended products were also examined. The NMR analysis showed that the resin contained 21.6 % butadiene monomer, in which its value was higher than the value required for materials with high-impact classapplication. The blend of resins and rejected PMMA (10-30% w/w) could increase the tensile strength value and decrease Izod impact strength and elongation percentage. The morphological analysis showed that this increased PMMA content may also result in widespread brittle areas. Since the blend was designed without compatibilizers,the DSC analysis indicated that the resulting blend in any ratios was not completely miscible. It was revealed that ABS resins containing 10% PMMA was the best blend for the polymer engineering application and this blend still had adequate properties and elastomer content required."

"ABSTRAKDengan berkembangnya kemampuan rekayasa material, polimer blend menjadisalah satu metode untuk merekayasa material polimer yang penting karenaaplikasinya yang luas salah satunya usaha me-recycle limbah polimer. Telahdilakukan penelitian tentang pengaruh blending antara material polimer Poli(metilmetakrilat) (PMMA) regrind dengan Akrilonitril Butadiena Stirena (ABS).PMMA regrind merupakan limbah produksi berbentuk serpihan, berasal darilensa lampu motor yang cacat dan kemudian dihancurkan dengan mesin pencacah.Komposisi PMMA regrind yang ditambahkan kedalam ABS adalah 10%, 20%,30% dan 40% (% berat). ABS yang digunakan telah diidentifikasi persentasekomposisi monomernya dengan 1H-NMR. Proses blending menggunakan alatekstruder twin screw dengan setting parameter 210oC-240oC pada putaran 120rpm. Hasil blending ABS/PMMA dikarakterisasi sifat mekaniknya seperti tensilestrength, impact strength dan sifat termalnya dengan DSC serta morfologinyadengan SEM. Hasil analisis monomer ABS dengan 1H-NMR adalah akrilonitril9,26% ,butadiena 21,68% dan stirena 69,06%. Karakterisasi hasil blendingABS/PMMA menunjukkan bahwa semakin tinggi persentase PMMA yangditambahkan akan menaikkan nilai tensile strength material dan menurunkan nilaielongation dan impact strength-nya. Hasil DSC menyatakan blending tersebutimmiscible dan tidak compatible dilihat dari nilai Tg dari masing-masing blendingyang terdapat lebih dari satu Tg dan nilainya yang tidak berubah signifikan darinilai Tg penyusunnya yaitu ABS dan PMMA. Oleh karena itu, blending ABSdengan PMMA regrind dapat diaplikasikan untuk produk dengan kekuatanterhadap benturan dan fleksibilitas yang moderat seperti housing lampu kendaraanbermotor.

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ABSTRACT With the growing capabilities of materials engineering, polymer blend becomes auseful method to simulate polymer material. One example of it?s broadapplications is to recycle waste polymer. A research about the effects of blendingABS (Acrylonytrile Butadiene Styrene) with regrind-PMMA (PolymethylMethacrylate) has been done. The regrind-PMMA used were taken from the wasteproduction of housing lamp for automotive that has been through grindingprocess. The composition of regrind-PMMA added to the ABS is 10%, 20%, 30%and 40% from the total weight of mixture. The composistion of monomers insidethe ABS was previously identified by using 1H-NMR. Blending process is doneby using twin screw extruder which temperature was kept between 210oC-240oCon 120 rpm. The final blending product is characteristize by it?s mechanicalproperties such as tensile strength, impact strength, thermal properties (by usingDSC) and morphology properties (by using SEM). By using 1H-NMR, thecomposition of monomers inside ABS are 9,26% of acrylonitrile, 21,68% ofbutadiene and 69,06% of styrene. As the results of blending regrind-PMMA andABS is the higher percentage of regrind-PMMA added, the higher tensile strengthof the material, but in the other hand, the elongation and impact strenght arelower. DSC?s result shows that the blending is immicible and not compatible.Therefore, the blending of regrind-PMMA with ABS can be applied for producingnew product with moderate impact resistance and flexibility, such as housinglamp for automotive."

"Polipropilena (PP) merupakan salah satu jenis polimer termoplastik yang dibuat oleh industri polimer hulu dan digunakan dalam berbagai aplikasi. Pada penggunaannya, PP banyak ditambahkan material lain (contoh: talcum) untuk meningkatkan kualitas dan memperbaiki sifat materialnya sesuai kebutuhan. Di Indonesia, PP merupakan salah satu material yang memiliki permintaan yang besar. Namun permintaan tersebut tidak diimbangi dengan produksi yang dilakukan oleh industri polimer hulu yang ada di dalam negeri. Pada tahun 2011, Indonesia menjadi negara pengimpor produk olefin terbanyak di ASEAN. Oleh karena itu, solusi alternatif diperlukan untuk mengatasi masalah ini, salah satunya dengan menggunakan material daur ulang (regrind). Studi ini dilakukan untuk mengkaji karakteristik paduan yang terbentuk dari material regrind polipropilenatalcum (jenis komposit polipropilena yang banyak digunakan dalam industri otomotif) sehingga dapat diketahui apakah material regrind memiliki karakteristik yang tidak kalah baik dibandingkan material fresh-nya. Studi ini didukung dengan sebuah fakta bahwa material regrind polipropilena-talcum 20% memiliki titik leleh yang tidak berbeda jauh dengan temperatur leleh polipropilena (sekitar 176 °C), yaitu pada temperatur 176.4 °C. Studi ini dilakukan dengan membentuk paduan dari material regrind polipropilena-talcum 20% dan 30% dan melalui proses dry mixing dan hot melt mixing. Karakteristik yang dikaji meliputi perubahan morfologi yang terjadi akibat proses regrinding dan pencampuran material, perilaku mekanik (kekuatan tarik dan modulus elastisitas), dan perilaku termal material tersebut.

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Polypropylene (PP) is a thermoplastic polymer made by the polymer industry and used in various applications. In the application, PP is added to other material (eg, talcum) to improve the quality and enhance the properties of material. In Indonesia, the PP is one of the materials that have a great demand. But the request is not matched by production undertaken by the existing polymer industry in the country. In 2011, Indonesia became a net importer of most olefin products in ASEAN. Therefore, an alternative solution is needed to solve this problem, such as using recycled materials (regrind).

This study was conducted to examine the characteristics of the alloy is formed from polypropylene-talcum regrind material (polypropylene composites are widely used in the automotive industry) to know whether regrind material characteristics has significant differences compared to the fresh material. This study was supported by the fact that regrind material polypropylene-talcum 20% has a melting point which is not much different from the polypropylene melting temperature (around 176.0 °C), which is at 176.4 °C.

This study was conducted to form alloys of polypropylene regrind material-talcum 20% and 30% and through the process of dry mixing and hot melt mixing. Characteristics examined include morphological changes that occur due to the regrinding and mixing materials, mechanical behavior (tensile strength and modulus of elasticity), and the thermal behavior of the material."