半芳香共聚尼龙改性PA66的结晶行为与性能  

Crystallization and Properties of Semi-Aromatic Copolymer Nylon/PA66

作　　者：刘诗 李陵洲 狄春峰 万超 郑雄峰 Liu Shi;Li Lingzhou;Di Chunfeng;Wan Chao;Zheng Xiongfeng(Hubei Heju Polymer Materials Co.,Ltd.,Jiangling 434100,China;Wuhan Heju Industrial Materials Co.,Ltd.,Wuhan 430000,China)

机构地区：[1]湖北合聚高分子材料有限公司,湖北江陵434100 [2]武汉合聚实业集团有限公司,武汉430000

出　　处：《工程塑料应用》2023年第12期13-20,共8页Engineering Plastics Application

基　　金：湖北省揭榜制科技项目鄂科技发资项目[2020]24号。

摘　　要：为研究不同种类半芳香共聚尼龙改性PA66的结晶行为与性能,通过在PA66树脂中添加了不同种类的半芳香共聚尼龙树脂,对共混物进行了差示扫描量热分析以及力学性能测试,研究了不同种类及含量的半芳香共聚尼龙树脂对合金材料结晶行为和性能的影响。结果表明,不同种类的半芳香共聚尼龙树脂在共混物中的结晶行为及发挥作用时的最佳含量存在差异。随着聚己二酰间苯二甲胺(MXD6)树脂含量的增加,共混物的熔融温度(T_(m))、结晶温度(T_(c))降低,刚性和热变形增强,韧性降低,吸水率降低,密度影响不大。当聚邻苯二甲酰胺(PA6T-6)的质量分数达到树脂组分的40%时,共混物的结晶行为才发生明显变化,其刚性和热变形温度增加,韧性降低。随着PA6T-6含量的增加,共混物的吸水率随之降低,但对密度的影响不大。当聚对苯二甲酰戊二胺(PA5T)的质量分数达到树脂组分的30%时,PA5T才在共混物中发挥作用,韧性降低,吸水率降低。共混物的吸水率随着PA5T含量的增加呈现先降低后增加的趋势,但PA5T添加量的多少对共混物的密度影响不大。当聚对苯二甲酰癸二胺(PA10T)添加质量分数为树脂组分的40%以内时,共混物的Tm,Tc逐渐降低,刚性和热变形温度增加,韧性降低。共混物的吸水率则随着PA10T含量的增加而降低。当PA10T质量分数增加到树脂组分的50%时,吸水率不再降低,刚性和热变形温度不再增加。In order to study the crystallization behavior and properties of PA66 modified by different kinds of semi-aromatic copolymerized nylon resin,different kinds of semi-aromatic copolymerized nylon resin were added to PA66 resin,and the effects of different kinds and contents of semi-aromatic copolymerized nylon resin on the crystallization behavior and properties of alloy materials were studied.The results show that different kinds of semi-aromatic copolymerized nylon resins have different crystallization behavior and optimal content in the blends.With the increase of poly-m-xylyleneadipamide(MXD6)content,the melting temperature(T_(m))and crystallization temperature(T_(c))of the blend decrease,the rigidity and thermal deformation of the blend increase,the toughness and the water absorption decrease,and the density has little effect.When the addition amount of polyphthalamide(PA6T/6)is greater than or equal to 40%of the resin component,the crystallization behavior of the blend starts to change significantly,the rigidity and thermal deformation of the blend are enhanced,and the toughness is reduced.With the increase of PA6T/6 content,the water absorption of the blend decrease,and the density has little effect.When the added amount of poly(p-phenyl-pentadiamine)(PA5T)is greater than or equal to 30%of the resin component,PA5T starts to play a role in the blend,the toughness is reduced,the water absorption is reduced.The water absorption of the blend first decreases and then increases with the increase of PA5T content,and the addition amount of PA5T has little effect on the density of the blend.When the amount of polydecamethylene terephthalate(PA10T)is less than 40%of the resin component,the Tm and Tc of the blend gradually decrease,the rigidity and thermal deformation of the blend are enhanced,and the toughness is reduced.The water absorption of the blend decrease with the increase of PA10T content.When it is increased to 50%of the resin component,the water absorption is no longer reduced,and the rigidity and thermal d

关 键 词：半芳香共聚尼龙 尼龙66 结晶行为 力学性能 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]