乙酸木质素基聚氨酯薄膜的合成与性能研究  

Study on the Synthesis and Property of Lignin-based Polyurethane Film

作　　者：杨威[1] 敖日格勒[1] 蹇发伟[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《造纸科学与技术》2012年第1期34-36,53,共4页Paper Science & Technology

基　　金：国家高科技发展计划-863计划项目(2007AA100704)

摘　　要：以乙酸木质素(AAL)、聚乙二醇(PEG)和4,4'-二苯基甲烷二异氰酸酯(MDI)为原料合成了聚醚型聚氨酯薄膜,采用FTIR、TGA、DSC和拉伸试验对薄膜的结构和性能进行了研究。结果表明,PEG的链段长度是影响薄膜性能的主要因素。随着PEG链段长度的增加,聚氨酯材料的玻璃化转变温度降低,热分解温度升高;采用链段较长的聚乙二醇的薄膜,刚性小,引入PEG400的薄膜断裂伸长率最大可达292%。当木质素含量达到30%时,薄膜的拉伸强度和伸长率大幅度下降。Polyether- based polyurethane films were synthesized by acetic acid lignin（AAL） , polyethylene glycol （PEG） and 4,4＇ -diphenylmethane diisocyanate, the structure and property of the films were characterized by fourier transform infrared spectroscopy（FTIR） , thermogravimetric analysis（ TGA）, differential scanning calorimetry （DSC）. The results indicated that the properties of the films were mainly affected by the chain length of PEG. Poly- urethane represented lower glass transition temperature and higher decomposition temperature along with the in- crease in PEG chain length. Besides, films produced with long chain length of EO appeared to be soft and elastic, the elongation of those films with PEG400 were up to 292%. However, when the lignin content was further up to 30% , both tensile strength and ultimate strain of the films dramatically decreased on the contrary.

关 键 词：木质素 聚氨酯 薄膜 

分 类 号：O636.2[理学—高分子化学]