介绍了含二氮杂萘酮联苯结构聚芳醚系列树脂和烯丙基双酚A(DABPA)、对二苯甲烷型双马来酰亚胺(BDM)树脂共混增韧改性研究进展。以耐高温可溶性含二氮杂萘酮联苯结构聚芳醚酮(PPEK)、聚芳醚砜(PPES)或聚芳醚腈酮(PPENK)为增韧改性剂,既...介绍了含二氮杂萘酮联苯结构聚芳醚系列树脂和烯丙基双酚A(DABPA)、对二苯甲烷型双马来酰亚胺(BDM)树脂共混增韧改性研究进展。以耐高温可溶性含二氮杂萘酮联苯结构聚芳醚酮(PPEK)、聚芳醚砜(PPES)或聚芳醚腈酮(PPENK)为增韧改性剂,既可以提高BMI共混物的韧性,又赋予其优异的耐热性能,相比而言,含砜基的PPES的增韧效果最好。分别对聚芳醚进行氨基和马来酰亚胺基封端改性,并将其用于BDM的共混改性,结果表明氨基和马来酰亚胺端基均参与BDM树脂的固化反应,增强了聚芳醚树脂与BDM树脂的界面粘结作用,进而提高了增韧效果。其中,加入马来酰亚胺封端PPES的增韧效果最好,缺口冲击强度比纯BDM树脂提高近1倍,达到4.26 k J/m2,样品断面形貌结构分析表明共混物发生了明显塑性变形,在断裂过程中吸收了大量的冲击能,从而使韧性提高。展开更多
A series of aromatic copolyamides were prepared from（1,2-dihydro-2-（4-aminophenyl）-4-[4-（4-）（aminophenoxyl）phenyl）]phthalazin-1-one（DHPZ-DA）,p-phenylenediamine（PPD）,1,4-bis（4-aminophenoxy） benzene（BAPOB...A series of aromatic copolyamides were prepared from（1,2-dihydro-2-（4-aminophenyl）-4-[4-（4-）（aminophenoxyl）phenyl）]phthalazin-1-one（DHPZ-DA）,p-phenylenediamine（PPD）,1,4-bis（4-aminophenoxy） benzene（BAPOB） and terephthaloyl dichloride by low temperature solution polycondensation.The polymers had relatively high inherent viscosities ranging from 1.74 dL/g to 4.31 dL/g.The polymers exhibit improved solubility in polar aprotic solvents with or without the addition of LiCl because of the introduction of twisted non-coplanar phthalazinone moieties and flexible ether linkages.The polymers had high thermal stability.Their glass transition temperature（Tg） values were in the range of 291～351℃,and the 5% and 10% weight loss temperatures in nitrogen were in the range of 486～504℃ and 509～528℃,respectively.WAXD measurements indicated that these copolyamides were amorphous.Most of the polymers exhibited lyotropic liquid crystalline characteristics in conc.H2SO4,NMP/（10 g/L LiCl） and DMAc/（10 g/L LiCl） solutions.The polyamides with excellent properties made it possible for the different processing and applications such as dry-wet spinning of fibers or the preparation of films,membranes and coatings.展开更多
文摘介绍了含二氮杂萘酮联苯结构聚芳醚系列树脂和烯丙基双酚A(DABPA)、对二苯甲烷型双马来酰亚胺(BDM)树脂共混增韧改性研究进展。以耐高温可溶性含二氮杂萘酮联苯结构聚芳醚酮(PPEK)、聚芳醚砜(PPES)或聚芳醚腈酮(PPENK)为增韧改性剂,既可以提高BMI共混物的韧性,又赋予其优异的耐热性能,相比而言,含砜基的PPES的增韧效果最好。分别对聚芳醚进行氨基和马来酰亚胺基封端改性,并将其用于BDM的共混改性,结果表明氨基和马来酰亚胺端基均参与BDM树脂的固化反应,增强了聚芳醚树脂与BDM树脂的界面粘结作用,进而提高了增韧效果。其中,加入马来酰亚胺封端PPES的增韧效果最好,缺口冲击强度比纯BDM树脂提高近1倍,达到4.26 k J/m2,样品断面形貌结构分析表明共混物发生了明显塑性变形,在断裂过程中吸收了大量的冲击能,从而使韧性提高。
文摘A series of aromatic copolyamides were prepared from（1,2-dihydro-2-（4-aminophenyl）-4-[4-（4-）（aminophenoxyl）phenyl）]phthalazin-1-one（DHPZ-DA）,p-phenylenediamine（PPD）,1,4-bis（4-aminophenoxy） benzene（BAPOB） and terephthaloyl dichloride by low temperature solution polycondensation.The polymers had relatively high inherent viscosities ranging from 1.74 dL/g to 4.31 dL/g.The polymers exhibit improved solubility in polar aprotic solvents with or without the addition of LiCl because of the introduction of twisted non-coplanar phthalazinone moieties and flexible ether linkages.The polymers had high thermal stability.Their glass transition temperature（Tg） values were in the range of 291～351℃,and the 5% and 10% weight loss temperatures in nitrogen were in the range of 486～504℃ and 509～528℃,respectively.WAXD measurements indicated that these copolyamides were amorphous.Most of the polymers exhibited lyotropic liquid crystalline characteristics in conc.H2SO4,NMP/（10 g/L LiCl） and DMAc/（10 g/L LiCl） solutions.The polyamides with excellent properties made it possible for the different processing and applications such as dry-wet spinning of fibers or the preparation of films,membranes and coatings.
