Graft Gravimetric method

Figure 6. Effect of ceric ion concentration on the graft copolymerization of acrylonitrile onto holocellulose. Key A, using gravimetric method O, using spectroscopic method.

Gravimetric method determines the content of CD by precisely measureing the weight change of the sample before and after immobilization. This method is based on different content of CD which when immobilized on the carrier has no effect on quantity of crosslinking agent which was grafted on the carrier. The determination result is not very accurate and is suitable for applications which have low expectations on quantitative analysis. 

Grafting percent (Gp), and grafting efficiency (Ge) were obtained by the gravimetric method according to the following definitions ... 

The primary methods for analysis were usually gravimetric, thermal, and spectroscopic in nature but not necessarily correlated with in situ analysis (XPS, AFM, TEM, etc.) or ex situ analysis of surface-bound polymers by de-grafting (NMR, MW, polydispersity, etc.). Colloidal stability and homogeneity of the grafting process is a primary concern. A range of these systems were analogous to what has been done in solution and in bulk and should be thoroughly examined in terms of chemistry on flat substrate surfaces. Several examples follow. 

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