Influences of molecular structures on synthesis and properties of polyimide
Author(s): Xu Xiaolu, Guizhou Provincial College Special Engineering Center for Materials Protection of Wear and Corrosion, GuiyangUniversity
Pages: 24-26+34
Year: 2014 Issue: 8
Journal: China Adhesives
Keyword: polyimide(PI); molecular structure; synthesis;
Abstract: With PMDA(pyromellitic anhydride)and ODPA(monoether anhydride)as main raw materials,twopolyimide(PI) films with different structures were prepared,and their inherent viscosity[η] of prepolymerpolyamide acid(PAA) solution,and mechanical property and thermal property of PI films after imine wereinvestigated. The research results showed that the [η] of PAA solution was progressively decreased with increasingmolecular chain flexibility. Because the PI with relatively more ether bond after imine could improve the flexibilityof macromolecular chain,so it has the good film adhesion,flexibility and impact strength. The thermaldecomposition temperatures of two PI films with different structures exceed all 510 ℃.polyimidePImolecular structuresynthesis
Pages: 24-26+34
Year: 2014 Issue: 8
Journal: China Adhesives
Keyword: polyimide(PI); molecular structure; synthesis;
Abstract: With PMDA(pyromellitic anhydride)and ODPA(monoether anhydride)as main raw materials,twopolyimide(PI) films with different structures were prepared,and their inherent viscosity[η] of prepolymerpolyamide acid(PAA) solution,and mechanical property and thermal property of PI films after imine wereinvestigated. The research results showed that the [η] of PAA solution was progressively decreased with increasingmolecular chain flexibility. Because the PI with relatively more ether bond after imine could improve the flexibilityof macromolecular chain,so it has the good film adhesion,flexibility and impact strength. The thermaldecomposition temperatures of two PI films with different structures exceed all 510 ℃.polyimidePImolecular structuresynthesis
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