The pyrolytic oil products analyzed by gc ms showed

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Unformatted text preview: ounds, and polycyclic aromatic hydrocarbons (PAHs) were found in this study. The bio-oil resulting from the pyrolysis process gives n-hexadecanoic acid as the major compound. IND-O8 THE EFFECTS OF DIMETHYLACETOACETAMIDE, MONOMETHYLACETOACETAMIDE AND ACETOACETAMIDE ON THE DURABLE PRESS PERFORMANCE OF COTTON FABRICS TREATED WITH DMDHEU AND GLYCOLATED DMDHEU Priscilla Lim Ming Huei and Che Su Endud School of Chemical Sciences, Universiti Sains Malaysia, Pulau Pinang 11800, Malaysia E-mail: plimmh@hotmail.com DMDHEU, a renowned formaldehyde-based cross-linking agent for cellulosic fibers, has been established as one of the most effective crease resistance agents in textile finishing industries. It confers relatively high overall durable press (DP) performance to cotton while maintaining the fabric strength at a satisfactory level. However, the free formaldehyde content released from finished products fails to achieve acceptable levels. In this study, DMDHEU was modified with ethylene glycol (EG), diethylen e glycol (DEG) and 5 - 10 % N,N-dimethylacetoacetamide (DMAA), 5 - 10 % N-monomethylacetoacetamide (MMAA), 5 - 10 % acetoacetamide (AA) respectively as well as with mixtures of DMDHEU/EG/DMAA, DMDHEU/DEG/DMAA, DMDHEU/EG/MMAA, DMDHEU/DEG/MMAA, DMDHEU/EG/AA and DMDHEU/DEG/AA using the pad-dry-cure method. Using magnesium chloride as the catalyst, samples were dipped and padded at 70 - 80 % wet pick-up, dried at 100 °C for 3 minutes and cured at 150 - 190 °C for 1 - 1¾ minutes. The degree of cross-linking of treated samples were characterised by their DP ratings while the extent of detrimental effects caused by the resin were measured by their tensile strengths. The results showed that DMDHEU in combination with DEG and acetoacetamide derivatives brought about positive effects to the treated fabrics as they significantly reduced the free formaldehyde content and slightly decreased the strength loss of fabrics while giving the DP rating and whiteness index at acceptable levels. The optimum DP performance was shown by DMDHEU/DEG/10 % DMAA formulation, cured at...
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