Morphology and mechanical properties of aliphatic polyurea with different hard segment contents

作者：Yang J^*; Wang GY; Hu CP

来源：Acta Polymerica Sinica, 2003, (6): 794-798.

• aliphatic polyurea
• morphology
• hydrogen bonding
• mechanical properties

A series of aliphatic polyureas with different hard segment contents were synthesized by the reaction of isophorone diisocyanate with Jeffamine D2000 and isophorone diamine as chain extender in solution. The effect of hard segment contents on the morphology and mechanical properties for these polyureas was studied by using DSC and FTIR etc.The experimental results showed that the polyureas exhibited a partial phase separated morphology. The polyurea with higher hard segment contents showed a better compatibility between the soft and hard segments, and a higher degree of hydrogen bonding for the urea carbonyl groups existed in the system, but the values of T-g for the soft segment regions almost did not depend on the hard segment content. The tensile strength, hardness and shear strength of polyurea specimens were enhanced greatly with increasing the hard segment content.

• 出版日期2003-12
• 单位东华大学