Synthesis of Aldehyde-Terminated Epoxidized Liquid Polybutadiene Rubber
محل انتشار: بیستمین کنگره شیمی ایران
سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 286
متن کامل این مقاله منتشر نشده است و فقط به صورت چکیده یا چکیده مبسوط در پایگاه موجود می باشد.
توضیح: معمولا کلیه مقالاتی که کمتر از ۵ صفحه باشند در پایگاه سیویلیکا اصل مقاله (فول تکست) محسوب نمی شوند و فقط کاربران عضو بدون کسر اعتبار می توانند فایل آنها را دریافت نمایند.
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
IRANCC20_427
تاریخ نمایه سازی: 28 اردیبهشت 1398
چکیده مقاله:
Polybutadiene rubber is a synthetic elastomer with large scale applications in industry. Functionalization of polybutadiene and other polyolefins is a method to adjust their physical, chemical and mechanical properties [1]. However, preparation of functionalized polyolefins with controlled functionalities usually needs complex synthetic routs and accurate control of the reaction condition [2]. Herein, we prepared epoxide- and aldehyde-functionalized polybutadiene rubber by modification of pristine polybutadiene rubber. Polybutadiene rubber was dissolved in THF and treated with periodic acid. Periodic acid is an oxidizing agent which first reacts with vinyl groups (double bonds)to produce epoxide rings. The resulting epoxide groups can further react with periodic acid, and aldehyde groups are formed through epoxide ring opening and subsequent chain cleavage reactions. Therefore, an aldehyde-terminated epoxidized polybutadiene rubber is obtained at the end of the reaction (Fig. 1). The structure of the product was characterized by NMR spectroscopy and the presence of epoxide and aldehyde groups were confirmed. The epoxidation percent and molecular weight of the final product were also calculated. Because of the cleavage of the polymer chain, the molecular weight of the polymer is decreased and, thus, a viscous liquid functionalized polybutadiene rubber is obtained. Aldehyde-terminated epoxidized polybutadiene rubber with controlled molecular weights and epoxidation percents could be obtained by varying the amount of oxidant and the experimental conditions. This method is also promising for functionalizing other vinyl-containing rubbers.
نویسندگان
Alireza Banan
Faculty of Science, Imam Hossein University, Tehran, Iran
Hossein Mehdipour
Faculty of Science, Imam Hossein University, Tehran, Iran
Kourosh Adib
Faculty of Science, Imam Hossein University, Tehran, Iran