Effect of grafted maleic anhydride content and recyclability of dynamically cured maleated natural rubber/polypropylene blends

2008 ◽  
Vol 110 (6) ◽  
pp. 4071-4078 ◽  
Author(s):  
Charoen Nakason ◽  
Sitisaiyidah Saiwari
Keyword(s):  
Maleic Anhydride ◽  
Natural Rubber ◽  
Polypropylene Blends ◽  
Maleated Natural Rubber

scholarly journals Kesetimbangan Cair-Cair Sistem Polipropilena dan Maleated Natural Rubber

2019 ◽  
Vol 4 (2) ◽  
pp. 68-78
Author(s):  
Russita Martani ◽  
Bahruddin Bahruddin ◽  
Amun Amri
Keyword(s):  
Maleic Anhydride ◽  
Natural Rubber ◽  
Scanning Calorimetry ◽  
Internal Mixer ◽  
Maleated Natural Rubber

Pada campuran polipropilena (PP)-maleated natural rubber (MNR), MNR berfungsi sebagai compatibilizer yang melakukan modifikasi terhadap permukaan matrik PP untuk memudahkan masuknya filler sehingga dihasilkan campuran yang lebih kompatibel. Tujuan dari penelitian ini adalah untuk menentukan kemampuan campur maleated natural rubber (MNR) dalam polipropilena (PP) pada berbagai variasi suhu. Penelitian diawali dengan prediksi kesetimbangan cair-cair sistem PP-MNR dengan menggunakan metode UNIFAC dilanjutkan dengan validasi model kesetimbangan. Validasi model kesetimbangan cair-cair sistem PP-MNR diawali dengan mencampurkan karet alam dan maleic anhydride (MAH) dalam internal mixer untuk penyiapan MNR. MNR yang telah disiapkan lalu dicampurkan dengan PP dalam internal mixer dengan kadar MNR dan temperatur proses divariasi berdasarkan prediksi kesetimbangan cair-cair UNIFAC. Kemudian campuran PP-MNR dianalisa dengan uji difference scanning calorimetry (DSC). Hasil uji DSC digunakan untuk melakukan validasi hasil perhitungan kesetimbangan cair-cair UNIFAC. Hasil perhitungan UNIFAC merupakan kesetimbangan cair-cair sistem PP-MNR berupa kadar MNR dan temperatur proses pencampuran. Pada campuran ini MNR berfungsi sebagai compatibilizer. Kadar MNR pada campuran adalah 4,4%–11,16% dan temperatur proses adalah 170 o C–210 o C. Semakin besar kadar MNR dalam campuran, semakin rendah suhu proses pencampuran. Hasil validasi uji DSC sesuai dengan prediksi kesetimbangan cair-cair sistem PP-MNR menggunakan metode UNIFAC.

scholarly journals Maleated Natural Rubber/Halloysite Nanotubes Composites

Processes ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 286 ◽  
Author(s):  
Nabil Hayeemasae ◽  
Zareedan Sensem ◽  
Kannika Sahakaro ◽  
Hanafi Ismail
Keyword(s):  
Tensile Strength ◽  
Natural Rubber ◽  
Large Strain ◽  
Halloysite Nanotubes ◽  
Maximum Torque ◽  
Sem Images ◽  
Filler Dispersion ◽  
Dynamical Properties ◽  
Improved Performance ◽  
Maleated Natural Rubber

In this study, maleic anhydride (MA) grafted natural rubber (NR), known as maleated natural rubber (MNR), was melt-prepared with the MA content varied within 1–8 phr. MNR was used as the main matrix, with Halloysite Nanotubes (HNT) as a filler, in order to obtain composites with improved performance. The compounds were investigated for their filler–filler interactions by considering their Payne effect. On increasing the MA content, scorch and cure times increased along with maximum torque and torque difference. The MNR with 4 phr of MA exhibited the least filler–filler interactions, as indicated by the retention of the storage modulus after applying a large strain to the filled compound. This MNR compound also provided the highest tensile strength among the cases tested. It is interesting to highlight that MNR, with an appropriate MA content, reduces filler–filler interactions, and, thereby, enhances the HNT filler dispersion, as verified by SEM images, leading to improved mechanical and dynamical properties.

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