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首页> 外文期刊>Vlakna a Textil >PREPARATION AND PROPERTIES OF CARBOXYMETHYLSTARCH ESTER AND ITS BLENDS WITH POLYETHYLENE
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PREPARATION AND PROPERTIES OF CARBOXYMETHYLSTARCH ESTER AND ITS BLENDS WITH POLYETHYLENE

机译：羧甲基淀粉酯及其与聚乙烯的共混物的制备及性能

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摘要

A water insoluble carboxymethylstarch ester with a higher degree of substitution was prepared by esterification of carboxymethylstarch (CMS) with lauroylchloride in DMF / pyridine and 4-dimethylaminopyridine as a catalyst. The newly prepared lauroylated CMS (LaCMS) with DS_(La) = 2.45 was characterised by FTIR spectroscopy and DSC methods. The CMS esters exhibited a higher degree of thermal stability than the initial material. The lauroylated CMS was subsequently mixed at various proportions (from 1-50wt% ) with a low density of polyethylene (LDPE) in the "Brabender" device, and blends were prepared. The blends were characterized by ATR spectroscopy. The mechanical properties and degradation of the blends were tested. The blends showed comparable mechanical properties to the LDPE with a LaCMS content of 10wt%. The biodegradation rate is very slow - the blend with the 50 wt% LaCMS achieved the greatest weight loss of 1.67%.
机译：通过用月桂酰氯在DMF /吡啶和4-二甲基氨基吡啶作为催化剂的条件下将羧甲基淀粉（CMS）酯化，制备了具有较高取代度的水不溶性羧甲基淀粉酯。用FTIR光谱和DSC方法表征了新制备的DS_（La）= 2.45的月桂酰化CMS（LaCMS）。 CMS酯显示出比原始材料更高的热稳定性。随后在“ Brabender”装置中将月桂酰化的CMS以各种比例（从1-50wt％）与低密度聚乙烯（LDPE）混合，并制备共混物。通过ATR光谱法表征共混物。测试了共混物的机械性能和降解。共混物的LaCMS含量为10wt％，显示出与LDPE相当的机械性能。生物降解速度非常慢-与50 wt％LaCMS的混合物的最大失重为1.67％。

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