摘要
以聚醚三元醇、二苯甲烷二异氰酸酯以及己内酰胺为单体,在碱性催化剂条件下,通过单体浇铸工艺合成聚酰胺6-聚氨酯(PA6-PU)嵌段共聚物。采用傅里叶变换红外光谱仪、差示扫描量热仪表征其结构与性能。结果表明,PA 6-PU嵌段共聚物的熔点下降,且具有两相结构。力学性能分析显示,PU组分的嵌入使共聚物的常温冲击强度由7.20kJ/m^2提高到42.76kJ/m^2,低温(-50℃)冲击强度由4.20 kJ/m^2提高到15.14 kJ/m^2。
Polyamide 6 （PA 6）-polyurethane （PU） block copolymers were synthesized with polyether glycerol diphenyl methane-4,4＇diisocyanate （MDI） and ε-caprolactam as monomers via monomer casting technology in the presence of basic catalyst. The structure and properties of PA 6-PU block copolymers were characterized with Fourier transform infrared spectroscop（FTIR） and differential scanning calorimet（DSC）. The DSC results show that melting temperature of PA 6-PU block copolymer decreases compared to the pure PA 6 and the copolymer has two phase structure. The mechanical properties data show that the impact strength of the copolymer is improved from 7.20 kJ/m^2 to 42.76 kJ/m^2 at room temperature with addition of PU prepolymer, from 4.20 kJ/ m^2 to 15.14 kJ/m^2 at low temperature （-50℃）.
出处
《合成树脂及塑料》
CAS
北大核心
2009年第4期29-32,共4页
China Synthetic Resin and Plastics
基金
中南大学研究生创新选题基金资助(1343-77234)
