摘要
通过将缩聚原液或硫酸浆液用玻璃刮刀在玻璃板上刮平,放入水浴中沉析,用水清洗并干燥,成功地制得了以1,5-萘二胺、4-甲基间苯二胺和4,4’-二氨基二苯醚为第三单体的共聚芳酰胺薄膜。随第三单体含量的增加,薄膜的拉伸强度和模量降低而伸长率增加。当第三单体含量为20—30mol%时,得到了均匀透明的原液薄膜,与 PPTA 相比,其强度和模量较高(高达131.32N/mm^2和6.25kN/mm^2),伸长率大大增加(高达10.5%),柔韧性明显改善。而且发现在一定的第三单体含量(30—40mol%)时,所得的原液薄膜的性能发生突变。对该突变点进行了研究,确定了第三单体含量的最佳范围(20—30mol%)。其中,以4,4’-二氨基二苯醚为第三单体的共聚芳酰胺的综合性能最好,共聚物的η_(inh)较高,缩聚原液可直接制膜,而且薄膜的力学性能较好。
Using 1,5-naphthalenediamine,4-methyl-m-phenylenediamine and 4,4'-diami-nodiphenyloxide as the third monomer respectively,the aromatic copolyamide filmswere prepared by the means of scraping down the copolycondensation dope orthe sulphuric acid solution on the glass plate,coagulating in water-bath,washingin water and drying.The test results show that as the increase of the content of thethird monomer,the strength and modulus of the film reduce,the elongation increases.when the content of the third monomer is 20—30mol%,the even and transparent filmcan be obtained,the strength,modulus and elongation of which shall be 131.32N/mm^2,6.25kN/mm^2 and 10.5% respectively.The toughness of this film shall be obviouslyimproved.It is also found that when the content of the third monomer is constant(between 30—40mol%),the film obtained has a sudden change in properties.Afterstudying the sudden change point,the optimal content of the third monomer has beendetermined as 30—40 mol%.The properties of the copolyamide with the thirdmonomer 4,4'-diaminodiphenylether is the best.
出处
《合成纤维工业》
CAS
CSCD
1990年第2期14-19,共6页
China Synthetic Fiber Industry
