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Abstrak :
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. The monomer 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 class application. 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.

Abstrak :
ABSTRAK
Dengan berkembangnya kemampuan rekayasa material, polimer blend menjadi salah satu metode untuk merekayasa material polimer yang penting karena aplikasinya yang luas salah satunya usaha me-recycle limbah polimer. Telah dilakukan penelitian tentang pengaruh blending antara material polimer Poli(metil metakrilat) (PMMA) regrind dengan Akrilonitril Butadiena Stirena (ABS). PMMA regrind merupakan limbah produksi berbentuk serpihan, berasal dari lensa 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 persentase komposisi monomernya dengan 1H-NMR. Proses blending menggunakan alat ekstruder twin screw dengan setting parameter 210oC-240oC pada putaran 120 rpm. Hasil blending ABS/PMMA dikarakterisasi sifat mekaniknya seperti tensile strength, impact strength dan sifat termalnya dengan DSC serta morfologinya dengan SEM. Hasil analisis monomer ABS dengan 1H-NMR adalah akrilonitril 9,26% ,butadiena 21,68% dan stirena 69,06%. Karakterisasi hasil blending ABS/PMMA menunjukkan bahwa semakin tinggi persentase PMMA yang ditambahkan akan menaikkan nilai tensile strength material dan menurunkan nilai elongation dan impact strength-nya. Hasil DSC menyatakan blending tersebut immiscible dan tidak compatible dilihat dari nilai Tg dari masing-masing blending yang terdapat lebih dari satu Tg dan nilainya yang tidak berubah signifikan dari nilai Tg penyusunnya yaitu ABS dan PMMA. Oleh karena itu, blending ABS dengan PMMA regrind dapat diaplikasikan untuk produk dengan kekuatan terhadap benturan dan fleksibilitas yang moderat seperti housing lampu kendaraan bermotor.

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ABSTRACT
With the growing capabilities of materials engineering, polymer blend becomes a useful method to simulate polymer material. One example of it?s broad applications is to recycle waste polymer. A research about the effects of blending ABS (Acrylonytrile Butadiene Styrene) with regrind-PMMA (Polymethyl Methacrylate) has been done. The regrind-PMMA used were taken from the waste production of housing lamp for automotive that has been through grinding process. 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 inside the ABS was previously identified by using 1H-NMR. Blending process is done by using twin screw extruder which temperature was kept between 210oC-240oC on 120 rpm. The final blending product is characteristize by it?s mechanical properties such as tensile strength, impact strength, thermal properties (by using DSC) and morphology properties (by using SEM). By using 1H-NMR, the composition of monomers inside ABS are 9,26% of acrylonitrile, 21,68% of butadiene and 69,06% of styrene. As the results of blending regrind-PMMA and ABS is the higher percentage of regrind-PMMA added, the higher tensile strength of the material, but in the other hand, the elongation and impact strenght are lower. DSC?s result shows that the blending is immicible and not compatible. Therefore, the blending of regrind-PMMA with ABS can be applied for producing new product with moderate impact resistance and flexibility, such as housing lamp for automotive.