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基于玉米秸秆的聚氨酯泡沫机械特性的研究

发表时间:2008-08-31  浏览量:1480  下载量:551
全部作者: 王体朋,张连惠,李栋,尹君,常素强,毛志怀
作者单位: 华北电力大学生物质发电成套设备国家工程实验室;中国农业大学工学院
摘 要: 以未经预处理的液化玉米秸秆作为多元醇制备聚氨酯泡沫材料,以聚氨酯泡沫的拉伸强度和断裂伸长率为试验指标,通过改变异氰酸根指数[NCO]/[OH]和发泡剂用量,研究了异氰酸根指数和发泡剂用量对聚氨酯泡沫机械性能的影响。研究发现:随着异氰酸根指数的增加,材料的拉伸强度增加,断裂伸长率先增加后降低,最大值出现在1.2的位置;随着发泡剂用量的增加,材料的拉伸强度逐渐降低,断裂伸长率先增加后降低,最大值出现在0.5 g的位置;改变异氰酸根指数或发泡剂用量可以得到不同机械性质的聚氨酯泡沫材料。
关 键 词: 环境工程学;玉米秸秆;液化;聚氨酯泡沫;机械特性
Title: Study on the mechanical properties of polyurethane foams based on corn stover
Author: WANG Tipeng, ZHANG Lianhui, LI Dong, YIN Jun, CHANG Suqiang, MAO Zhihuai
Organization: National Engineering Laboratory of Biomass Power Generation Equipment, North China Electric Power University
Abstract: Polyurethane foams were prepared with liquefied corn stover that wasn’t pretreated as polyol. Taking the tensile strength and elongation at break of polyurethane foams as factors, the effects of [NCO]/[OH] ratio and blowing agent content on the mechanical properties of polyurethane foams were investigated by changing [NCO]/[OH] ratio and blowing agent content. Results show that with the increasing of [NCO]/[OH] ratio, the tensile strength increased, the elongation at break first increased and then decreased. Elongation at break reached its maximum at a [NCO]/[OH] ratio of 1.2. With the increasing of blowing agent content, the tensile strength decreased, and the elongation at break first increased and then decreased. Elongation at break reached its maximum at a blowing agent content of 0.5 g. Polyurethane foams with different mechanical properties can be obtained by changing [NCO]/[OH] ratio or blowing agent content.
Key words: environmental engineering; corn stover; liquefaction; polyurethane foams; mechanical properties
发表期数: 2008年12月第16期
引用格式: 王体朋,张连惠,李栋,等. 基于玉米秸秆的聚氨酯泡沫机械特性的研究[J]. 中国科技论文在线精品论文,2008,1(16):1804-1807.
 
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