Grafting of caprolacton to cellulose acetate by reactive processing
摘要：
H NMR, and FTIR spectroscopy. Significant modification of cellulose acetate did not occur at low temperatures, below 180°C. Grafting efficiency increased with increasing temperature and time. The extent of grafting could be estimated from the amount of material extracted from the samples by toluene and by FTIR analysis, from the relative intensity of –CH– and –CH vibrations. The amount of polycaprolacton homopolymer is relatively low at the end of the reaction; the efficiency of grafting is good. Although high temperature and long reaction time favor grafting, considerable degradation of the product occurs under these conditions. Quantitative analysis showed that the average length of grafted oligomeric caprolacton chains is around 3 monomer units. The chains attached to the CA backbone internally plasticize the polymer leading to a considerable decrease of its glass transition temperature.
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DOI：
10.1016/j.eurpolymj.2005.03.002
被引量：
年份：
2005
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