首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Synthesis and characterization of copolymers of limonene with styrene initiated by azobisisobutyronitrile
Authors:Saroj Sharma
Institution:Department of Chemistry, H.B. Technological Institute, Nawab Ganj, Kanpur 208002, India
Abstract:The radical copolymerization of limonene with styrene by azobisisobutyronitrile in xylene at 80 ± 0.1 °C for 2 h, under inert atmosphere of N2, yields alternating copolymers. The kinetic expression is Rp∝I]0.5Sty]1.0Lim]−1.0. The overall activation energy is calculated as 41 kJ/mol. The FTIR and 1H-NMR spectra of copolymers show bands at 3000 and 1715 cm−1 and peaks at 6.8 δ and 5.3 δ due to phenyl protons of styrene and trisubstituted olefinic protons of limonene, respectively. The values of reactivity ratios r1(Sty)=0.0625 and r2(Lim)=0.014, calculated by Kelen-Tüdos method. The Alfrey-Price Q-e parameters for limonene are 0.438 and −0.748, respectively. The penultimate unit effect is favoured in the present system and the value of φ is 38.49.
Keywords:Limonene  Styrene  Azobisisobutyronitrile  Copolymerization and penultimate unit effect
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号