文献类型：期刊文献

中文题名：基于聚二元羧酸异山梨醇酯二醇聚氨酯的制备与性能

英文题名：Preparation and Properties of Polyurethanes from Poly(isosorbide dicarboxylate)Diols

作者：曹宝仁[1];许祥鸿[1];王贵友[1]

机构：[1]华东理工大学材料科学与工程学院,上海市先进聚合物材料重点实验室,上海200237

年份：2020

卷号：33

期号：4

起止页码：373

中文期刊名：功能高分子学报

外文期刊名：Journal of Functional Polymers

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：罗盖特管理(上海)有限公司资助项目。

语种：中文

中文关键词：生物基聚氨酯;异山梨醇;聚酯二醇;形态;力学性能;亲水性

外文关键词：bio-based polyurethane;isosorbide;polyester diol;morphology;mechanical property;hydrophilicity

摘要：利用生物基异山梨醇(IS)和具有不同亚甲基链长的脂肪族二元羧酸反应制备了生物基聚二元羧酸异山梨醇酯二醇(PISA)。用PISA和1,4-丁二醇(BDO)与4,4-二苯基甲烷二异氰酸酯(MDI)反应制备了生物基聚氨酯(Bio-PU)材料。通过傅里叶红外光谱(FT-IR)、核磁共振氢谱(1H-NMR)和差示扫描量热(DSC)等对PISA的结构和热性能进行了表征。利用FT-IR、DSC、动态热机械分析(DMA)、原子力显微镜(AFM)和力学性能测试等研究了PISA重复单元中亚甲基数对Bio-PU的结构与性能的影响。结果表明,随着二元羧酸链长增加,PISA的玻璃化转变温度(Tg)逐渐下降、结晶性提高且黏度下降。随着PISA重复单元中亚甲基数增加,Bio-PU的氢键作用减弱,Tg下降,储能模量、屈服强度以及亲水性降低,但断裂强度和断裂伸长率提高。
Firstly,a series of bio-based poly(isosorbide dicarboxylate)diols(PISA)were synthesized by the reactions between bio-based isosorbide(IS)and five kinds of dicarboxylic acids with different methylene chain lengths.Then,bio-based polyurethane(Bio-PU)was prepared by the reaction between 4,4'-diphenylmethane diisocyanate(MDI)with PISA and 1,4-butanediol(BDO)as the chain extender.The structure and thermal properties of PISA samples were characterized by Fourier transform infrared spectroscopy(FT-IR),nuclear magnetic resonance spectroscopy(1H-NMR)and differential scanning calorimeter(DSC).The structure and properties of Bio-PU were characterized by FT-IR,DSC,dynamic mechanical thermal analyzer(DMA),atomic force microscope(AFM),water contact angle test and measurement of mechanical properties.Results showed that Mn of PISA were in the range between 672 and 940.As the carbon numbers in repeating units of PISA increased from 4 to 12,the glass transition temperature(Tg)of PISA samples decreased from 10.5°C to?40.9℃.The viscosity also decreased,but the crystallinity increased.When the length of methylene chain in the repeating unit of PISA increased,the hydrogen bonding of Bio-PU decreased.Tg values decreased from 114°C to 71.4°C.The yield strength,Young's modulus and Shore D hardness decreased from 62.9,2042 MPa and 80 to 53.4,1070 MPa and 72,respectively.The hydrophilicity also decreased.However,the tensile strength and elongation at break were improved appreciably from 36.0 MPa and 46%to 64.5 MPa and 220%,respectively.A new way to prepare Bio-PU with high rigidity and mechanical properties from IS is provided.