摘要
以不经任何预处理的液化玉米秸秆作为多元醇,以三乙胺和二月桂酸二丁基锡为联合催化剂制备聚氨酯泡沫材料,研究了催化剂用量和催化剂间比例对聚氨酯泡沫机械特性的影响。研究结果表明,随着催化剂间比例的增大,聚氨酯泡沫的拉伸强度先增加后降低,然后又增加,最大值为1.760 MPa,断裂伸长率先增加后降低,最大值为91.04%;随着催化剂用量的增加,聚氨酯泡沫的拉伸强度和断裂伸长率均先增加后降低,并最终保持在一定值基本不变,当催化剂用量为1%时,二者分别达到最大值1.709 MPa和63.06%。改变催化剂用量或者催化剂间比例可以得到机械性质不同的聚氨酯泡沫材料。
Polyurethane （PU） foams were successfully prepared from non-pretreated liquefied corn stalk with polyol and triethylamine and dibutyhine dilaurate as co-catalyst. The effects of co- catalyst and ratios between catalysts on the mechanical properties were investigated by means of a universal tensile machine. The results showed that with an increase of ratio between catalysts, the tensile strength of the PU foams will first increase and then decrease, and at last reach its maximum value 1.760 MPa at ratio of 0.3：0 between catalysts, while the elongation at break will first increase and then decline and reach its maximum value of 91.04% at ratio of 2：3 between catalysts; with an increase of co-catalyst, the tensile strength and the elongation at break will first increase, reach their maximum values of 1.709 MPa and 63.06% respectively at co-catalyst of 1.0%, and then will decline. Varying the dosage of co-catalyst or ratios between catalysts is an effective method to change the mechanical properties of PU foams.
出处
《可再生能源》
CAS
北大核心
2009年第6期50-53,57,共5页
Renewable Energy Resources
基金
国家自然科学基金(3047137)
教育部博士点基金(20060019041)
华北电力大学博士学位教师科研基金
关键词
玉米秸秆
聚氨酯泡沫
机械特性
催化剂
corn stalk
polyurethane foams
mechanical properties
catalyst
