Abstract: Rigid-flexible block copolymers composed of rigid chains and flexible chains have excellent properties and are widely used in various industries.The effects of the rigid strength,content and distribution of rigid segments on the mechanical strength and thermal performance of these copolymers were investigated by molecular dynamics.The study found that the increase of rigid strength and rigid block content leaded to the improvement of mechanical strength and the deterioration of thermal performance.When the content of rigid block was constant,the material with excellent mechanical properties and low hysteretic heat generation loss could be obtained by adjusting the distribution of rigid block.On this basis,the effects of branching and cross-linking were explored,and the results showed that molecular chain branching and flexible block cross-linking could improve the mechanical properties of the materials.
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2023, Vol. 51 
