A study of some accelerator combinations in the vulcanization of rubber

• Main Author: K. C. , Rasaratnam
• Format: Thesis
• Language: English
• Published: 1975
• Subjects: T1-995 Technology(General)
• Online Access: http://eprints.usm.my/35507/1/K.C._RASARATNAM_%28KHK%29_%28NN24%29.pdf; http://eprints.usm.my/35507/

Penyelidikan dan perkembangan yang berterusan terhadap pembaikan vulkanisasi belerang sejak terciptanya pada tahun 1839 telah mengakibatkan penukaran yang berfaedah saperti penggunaan aselerator tunggal dan aktivator-aktivator dalam sistem belerang biasa sistem E.V. (e£ficient vulcanization) dan applikasi kembinasi aseleratoraselerator. Penggunaan aselerator-aselerator organik dimulakan pada awal tahun 1930. Ada beberapa aselerator organik bila digunakan secara kembinasi menunjukkan kesan yang akti£ atau kesan sinergistik dalam kadar vulkanisasi dan si£at fizikal getah vulkanisa. Cara dan makenisma pergerakan aseleratoraselerator sehingga sekarang belum dapat dijelaskan dengan memuaskan, kerana itu tidak ada teori asas yang boleh menyatakan kadar yang tepat untuk kombinasikombinasi aselerator yang boleh menghasilkan kesan sinergistik maksima. Continuous research and development towards the improvement of sulphur vulcanization since its discovery in 1839, has resulted in useful modifications such as the use of single accelerator and activators in the conventional sulphur s.ystems, the E.V,. (efficient vulcanization) systems, and the applications of accelerator combinationso The use of combinations of organic accelerators started as early as 1930s. Certain organic accelerators when used in combinations were found to give boosted effects or synergistic effects in the rate of cure and physical properties of the vulcanized rubber~ The mode of their action and mechanisms have not been satisfactorily explained hitherto; and thus there is no theoretical basis available to predict the favourable ratio (of the components of any accelerator combination), which could give the maximum synergistic effects.