聚氨酯的高温耐水解改性  

The Hydrolysis Resistance Against Hot Water of Polyurethane

作　　者：邓锋杰[1] 李卫凡[1] 徐少华[1] 陈义旺[2] 

机构地区：[1]南昌大学化学系,江西南昌330031 [2]南昌大学材料科学与工程学院,江西南昌330031

出　　处：《南昌大学学报（理科版）》2007年第6期576-578,582,共4页Journal of Nanchang University(Natural Science)

摘　　要：用甲苯-2,4-异氰酸酯(TD I)对聚氨酯(PU)膜片进行处理,使得膜表面生成自由的异氰酸酯(NCO)基团,然后再经过3-氨丙基三甲氧基硅烷(KBE-903)与之作用后,裸露在外层的为三甲氧基硅烷,经水解、脱水,在表面形成一层致密的、耐水解的硅氧硅膜。对每步处理后的PU膜进行衰减全反射傅立叶红外(ART-FTIR)表征和X射线光电子能谱(XPS)分析,并经过耐水解实验,与原始未处理膜相比较,用该方法处理后的PU膜块,耐水解能力得到极大的提高。该实验的主要特点在于采用表面接枝的方法改性,保持了材料原有的各种优良力学性能。Polyurethane （PU） films were treated by toluene -2,4 -diisocyanate as to form free isocyanate groups （NCO） on the membrane surfaces, and then the membranes were cooperated with γ - aminopropyltrimethoxysilane （ KBE - 903 ）. So the external layer were trimethoxysilane groups, which can create compact and network state Si - O - Si cross - linked layer by hydrolysis reaction. PU films modified by each step were characterized by attenuated total reflectance （ATR） FT- IR spectroscopy ,and X- ray photoelectron spectroscopy （XPS）. The PU membranes treated by KBE -903 get higher hydrolysis resistance ability compared to the untreated PU membranes. The characteristic of this designed experiment was to obtain the material a variety of good original mechanical function via surface grafting modification.

关 键 词：聚氨酯 耐水解 表面改性 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]