塑料的高性能化已经成为当前研究的热点。选择耐水性优良的双酚A型二酐和双酚A型二胺作为反应单体,二步聚合得到分子量很高的端酸酐聚酰亚胺,利用酸酐的活性,接枝上酰基己内酰胺活性基团,聚合得到PI改性尼龙树脂,通过红外分析证明上述各步反应是成功的。聚酰亚胺（PI）改性尼龙的力学性能随着聚酰亚胺用量和分子量的增加而增加,明显优于一般工程塑料。微观分析聚酰亚胺分子并没有进入尼龙树脂的结晶相,而是形成致密的片晶存在尼龙基体中。
High performance trend of plastics has become a hot spot of current research.Select bisphenol A dianhydride and bisphenol A diamine with excellent water resistance as the reactant monomers to obtain anhydride-terminated polyimide with very high molecular weight by two-step polymerization,graft the active radicals of acyl caprolactam using the activity of anhydride and obtain PI modified nylon resin by polymerization.It is proved that the reaction in each above step is successful through infrared analysis.The mechanical properties of modified PI nylon increases with the increase of consumption and molecular weight of polyimide,which are remarkably better than general engineering plastics.Through microscopic analysis,the molecules of polyimide does not enter crystallization phase of nylon resin,but forms compact lamellar crystals existing in nylon matrix.
参考文献
| [1] | Fu Q.;Shen CC.;Lin FL.;Harris FW.;Cheng SZD.;Hsiao BS. Yeh FJ.;Livengood BP. .Crystallization and phase behavior in nylon 6 aromatic polyimide triblock copolymers[J].Macromolecular chemistry and physics,1998(6):1107-1118. |
| [2] | Pae Y .Preparation and characterization of polyimide-g-nylon 6 copolymers from nonfunctionalized polyimides[J].Journal of Applied Polymer Science,2006(1):292-299. |
| [3] | Pae Y .Structure and properties of polyimide-g-nylon 6 and nylon 6-b-polyimide-b-nylon 6 copolymers[J].Journal of Applied Polymer Science,2006(1):300-308. |
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