K. C. , Rasaratnam
(1975)
A study of some accelerator combinations in the vulcanization of rubber.
Masters thesis, Universiti Sains Malaysia.
Abstract
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.
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