Performance of maleated castor oil based plasticizer on rubber: rheology and curing characteristic studies

[摘要] The objective of this study was to evaluate the performance of maleated castor oil (MACO) as plasticizer on natural rubber (NR), ethylene propylene diene monomer (EPDM), and nitrile butadiene rubber (NBR). The parameter studied were involving rheological, curing and swelling properties. The MACOs were prepared by an esterification reaction between castor oil (CO) and maleic anhydride (MAH) with the help of xylene as water entrainer to improve water removal. Resulting oils then applied as a plasticizer in each of those rubbers within a fixed loading of 5 phr. Comparison has been made to evaluate the performance of MACO and conventional plasticizer (paraffinic oil for NR and EPDM, DOP for NBR) on each rubber. Rheology, curing characteristic and swelling of each rubber were studied. The results showed that rubber (NR/EPDM/NBR) plasticized with MACO had given similar flow characteristic to conventional plasticizers. MACO exhibited slow curing, confirmed by higher t90, but the scorch safety was of the same magnitude. MAH loading tended to decrease the flow properties and curing rate, while scorch time (ts2) was independent.

[发布机构] Center for Leather, Rubber, and Plastics, Ministry of Industry, Republic of Indonesia, Sokonandi St. Numb. 9, Yogyakarta; 55166, Indonesia^1

[效力级别] 化学 [学科分类] 材料科学（综合）

[关键词] Curing characteristics;Esterification reactions;Ethylene propylene diene monomer;Flow charac-teristics;Flow properties;Nitrile butadiene rubber;Swelling properties;Water removal