Ultrasonic induced grafting of maleic anhydride onto polypropylene in melt state

• Published in: Journal of polymer research Vol. 18; no. 6; pp. 2023 - 2031
• Main Authors: Ye, Yaqin, Qian, Jun, Xu, Yongshen
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.11.2011; Springer Nature B.V
• Subjects: Chains; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Ethanol; Ethyl alcohol; Grafting; Industrial Chemistry/Chemical Engineering; Maleic anhydride; Melts; Original Paper; Polymer Sciences; Polypropylenes; Styrenes; Ultrasonic initiation; Graft; Melt; Styrene; Maleic anhydride
• ISSN: 1022-9760; 1572-8935
• DOI: 10.1007/s10965-011-9611-9

This paper presented a model study on maleic anhydride (MAH) grafted polypropylene (PP) performed in melt state through ultrasonic initiation without any chemical initiator and solvent. The structures of PP- g -MAH were characterized by FTIR and 13 C NMR and the mechanism were discussed. The graft degree ( G ) was determined by titration using a solution of organic base tetra-butyl ammonium hydroxide (TBAOH) in ethanol, and the effects of ultrasonic intensity, MAH concentration and styrene (St) on G and graft efficiency ( G E ) of MAH were investigated. Results showed that MAH was successfully grafted onto the PP chain and the optimum conditions for grafting were at an ultrasonic intensity of 300 W with a MAH concentration of 25 wt.%, and the maximum G of MAH of 3.34 wt.% was obtained when the molar ratio of St to MAH was 1:1. DSC and XRD were also employed to determine the thermodynamic performance and crystalline structures of the products.