Melt free radical grafting

Li, X., Xie, X. M., and Guo, B. H. 2001. Study on styrene-assisted melt free-radical grafting of maleic anhydride onto polypropylene. Polymer 42 3419-3425. 

T. Vainio, G.H. Hu, M. Lambla, and J.V. Seppala, Functionalized polypropylene prepared by melt free radical grafting of low volatile ox-azoline and its potential in compatibilization of PP/PBT blends, /. Appl. Polym, Sci., 61(5) 843-852, August 1996. 

A general scheme of probable reactions taking place in a polymer melt when monomers are the free radical grafted onto its chains (6) is shown in Fig. 10.1. 

Shi, D., Hu, G. H., and Li, R. K. Y. 2006. Concept of nano-reactor for the control of the selectivity of the free radical grafting of maleic anhydride onto polypropylene in the melt. Chemical Engineering and Science 61 3780-3784. 

H Cartier, G-H Hu. Plastification or melting a critical process for free radical grafting in screw extruders. Polym Eng Sci 38 177-185, 1998. 

Butanediamine (BDA)-g-PDLLA was synthesized by grafting maleic anhydride onto the side chains of PDLLA via melt-free radical polymerization using benzoyl peroxide as initiator. BDA was then grafted via a V-acylation reaction. The biodegradation behavior of these graft copolymers could... 

With a history of more than 25 years, the free radical-induced grafting of MAH onto polyolefin substrates is one of the most studied polyolefin modification processes.29 "29, 302 The process has been carried out in the melt phase, in various forms of extruders and batch mixers, and there are numerous patents covering various aspects of the process. It has also been carried out successfully in solution and in the solid state. The materials have a range of applications including their use as precursors to graft copolymers, either directly, or during the preparation of blends.297... 

The use of reactive antioxidants containing two polymerisable polymer-reactive functions in the same antioxidant molecule is outlined here. Careful choice of the processing parameters, the type, and the amount of free radical initiator can lead to very high levels of antioxidant grafting [53, 57]. For example, melt grafting of concentrates (e.g. 5-20 wt%) of the di-acrylate hin-... 

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