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- The poly (amic acid) exhibited good solubility in common organic solvents. 该聚酰胺酸在普通有机溶剂中具有良好的可溶性.
- Synthesize poly(amic acid) by s-BPDA and 4,4'-ODA at 1:1(mol ratio ) in DMAC. 本论文中我们合成了苯胺齐聚物-聚酰亚胺梯度渐变的膜材料,并对其进行了表征:(1)以DMAC为溶剂,以摩尔比为1:1的s-BPDA和4,4’-ODA合成聚酰胺酸。
- The content of residual amic acid in imidization was determined by an improved potentiometric titration device. 实验结果表明:随着聚合度的增大,聚酰胺酸的特性粘数逐渐增大;
- The phenomonon was explained in view of the mechanism of chemical cyclization of poly(amic acid). 从聚酰胺酸化学环化反应机理出发对这一结果给予了解释。
- The potentiometric titration technique was used to determine the content of residual amic acid in polyimide, which was synthesized by the two-step method. 未完全环化的酰胺酸对聚酰亚胺的性能有重要影响,用电位滴定法可直接测定其含量。
- Store stability of poly(amic acid)s were investigated in different condition such as temperature, gelating state, adding molecular sieve. 考查了贮存温度、凝胶态、添加分子筛等条件对 PAA稳定性的影响 .
- The storage stability of the poly(amic acid)s were investigated as function of temperature, gel state, addition of molecular sieve. 考察了贮存温度、凝胶态、添加分子筛等条件对 PAA贮存稳定性的影响 .
- Monodispersed phenyl-capped tetraaniline was added to the poly(amic acid) at different ratio, then the mixture was mixed with ultrasonic for 15h . (2)将苯封端苯胺四聚体以不同比例混入聚酰胺酸中,超声15h混匀,再将混合物刮到玻璃板上,然后逐段升温得到梯度膜。
- Two new derivatives of 4 - dicyanomethylene - 2,6 - dimethyl - 4H - pyran and the corresponding poly (amic acid) were synthesized and characterized. 两种新的4-二氰亚甲基-2;6-二甲基-4H-吡喃衍生物及对应的聚酰胺酸被合成和表征.
- By virtue of the anhydride property of the isoimide rings, the PIIs were reacted with the alcohols to form poly(amic acid) esters(PAEs). 利用异酰亚胺环具有酸酐性质的特点,使之与醇类反应,得到溶解性能优良的聚酰胺酯(PAEs)。
- A series of phthaloyl chitosans (PCS) with different degree of substitution of amic acid were synthesized from completely deacetylated chitosan at room temperature. 室温条件下从完全脱乙酰化壳聚糖出发合成了不同酰胺酸取代度的邻苯二甲酰化壳聚糖 ,并以此为标样 ,标样的取代度由X射线光电子能谱 (XPS)确定。
- A series of poly(amic acid)s based on pyromellitic dianhydride (PMDA) and oxydiphthalic tetracarboxylic dianhydride (ODPA) was prepared in different solvents. 在不同溶剂中合成了一系列均苯二酐 ( PMDA)型和二苯醚二酐 ( ODPA)型聚酰胺酸 ( PAA) .
- For the first time, a series of novel single-walled carbon nanotubes (SWNT) / poly(amic acid) (PAA) graft composites were synthesized, and their complexes were prepared using the capability of coordination from poly(amic acid) containing bithiazole rings. 首次合成了一系列新型的单壁碳纳米管接枝聚酰胺酸的复合物,利用含联噻唑环聚酰胺酸的配位能力,制备了其金属配合物并研究了它们的磁性能和电性能。 本工作的一个重要结果是:这类配合物具有电、磁复合功能,既克服了碳管的非磁特性又可合理利用其导电性。
- Polyimide/MWNTs nanocomposites and polyimide/BaTiO3/MWNTs three-phase composites were also prepared by mixing MWNTs or BaTiO3-MWNTs with the poly(amic acid) precursor solution, casting the solution into film, and then thermal curing. 经过偶联剂表面处理的BaTiO_3粒子可以很均匀地分散在聚酰亚胺基体中,从而增加复合膜的热稳定性。
- On the Storage-stability of Poly(amic acid)s 聚酰胺酸贮存稳定性
- poly ( amic acid ) copolymer ( CPAA ) 共聚酰胺酸
- He gave me a taste of his acid wit. 他让我尝到了他敏锐尖刻之机智的滋味。
- Acid irritates the stomach lining. 酸能刺激胃黏膜。
- Acid had pitted the surface of the silver. 酸把银器的表面腐蚀了。
- INVESTIGATION ON CHEMICAL CYCLIZATION OF POLY(AMIC ACID) 聚酰胺酸化学环化的研究