以己二酸己二胺盐、二聚酸为原料,采用熔融缩聚方法制备了系列短链己二酸改性的二聚酸酰胺尼龙共聚物.考察了己二酸对二聚酸酰胺尼龙(DAPA)凝聚态结构、热性能的影响,对共聚物进行了表征.结果表明,己二酸的加入可促进DAPA从γ到α、β晶型的晶相转变,并提高其结晶程度,还可通过刚性分子骨架和N-Hσ-轨道与C=Οπ*-轨道的α-π*-超共轭效应对共聚物分子间缔合氢键的数量、电子离域方向和离域程度的调变作用提高酰胺基团的活性,对酰胺基团有活化作用,从而恶化DAPA的热稳定性.
参考文献
| [1] | Fan XD.;Waterhouse J.;Pfromm P.;Deng YL. .Synthesis and characterization of polyamide resins from soy-based dimer acids and different amides[J].Journal of Applied Polymer Science,1998(2):305-314. |
| [2] | Selva Cavus;M. Ali Gurkaynak .Influence of monofunctional reactants on the physical properties of dimer acid-based polyamides[J].Polymers for Advanced Technologies,2006(1):30-36. |
| [3] | Subiman Ghosh;D. Khastgir;Anil K. Bhowmick .Thermal degradation and ageing of segmented polyamides[J].Polymer Degradation and Stability,2000(3):427-436. |
| [4] | Zhang Y;Cheng KL;Xu JR .Thermal stability studies of polyamides and their block copolymers[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,2005(1/2):137-141. |
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