【摘要】 采用联苯四酸二酐(BPDA)与4,4’-二胺基二苯醚(4,4’-ODA)和3,4’-二胺基二苯醚(3,4’-ODA)聚合后,经亚胺化,制备了一系列二胺不同配比的高强度易加工的聚酰亚胺模塑料。并对其流变性能、力学性能及热学性能进行测试。结果表明,随着3,4’-ODA含量的增加模塑料的冲击强度没有大的改变,而流变性能随3,4’-ODA含量的增加而提高,w(3,4’-ODA)在50%时,玻璃化转变温度为275℃,材料的冲击强度为141 kJ/m2。模压压力为20 MPa时加工性能优异。更多还原

【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.更多还原