Abstract
A series of high-strength and processable polyimide(PI) moulding compounds with different content of diamine was prepared from 3,3′,4,4′-biphenyl tetracarboxylic diandhydride(BPDA) and 4,4′-diaminodiphenyl ether(4,4′-ODA),3,4′-diaminodiphenyl ether(3,4′-ODA) through chemical imiidization.The rheological,mechanical and thermal resistance properties of the PI moulding compounds were investigated.With the increasing of 3,4′-ODA content,the impact strength of the PI could be maintained without dramatic change.The rheological properties of the PI were enhanced and the glass transition temperature can reach 275 ℃.The impact strength of the PI is about 141 kJ/m2.Processability of the PI is superior at 20 MPa.
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