Penghidrogenan Getah Asli Cecair dan Getah Asli Cecair Terepoksida Menggunakan Diimida
Abstract
Penghidrogenan getah asli cecair (LNR) dan getah asli cecair terepoksida (LENR) dilakukan dengan menggunakan sumber diimida daripada 2,4,6-trimetilbenzenasulfonil hidrazida (MSH) untuk meningkatkan sifat fizikal, sifat kimia dan kestabilan terma bagi elastomer yang berasaskan diena. Mikrostruktur LNR dan getah asli cecair terhidrogen (HLNR) dianalisis menggunakan spektroskopi inframerah transformasi Fourier (FTIR) dan resonans magnet nukleus (NMR). Kestabilan terma bagi LNR dan HLNR ditentukan melalui analisis termogravimetri (TGA). Parameter seperti nisbah berat MSH:LNR, pelarut, masa dan suhu dikaji untuk mendapatkan peratusan penghidrogenan yang paling tinggi. Hasil kajian mendapati bahawa peratus penghidrogenan yang paling tinggi iaitu 55.0% diperolehi dengan menggunakan xilen sebagai pelarut, nisbah berat 1:1, masa selama 50 minit dan pada suhu 100 °C. Kestabilan terma bagi HLNR juga dapat dibuktikan dengan melihat kepada peningkatan suhu degradasi di mana HLNR (438 °C) adalah lebih tinggi berbanding LNR (380 °C).
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