Shanghai Daoqin Plastics Co., Ltd.

        PA66 and PA6 is currently PA product in output/production volume most large, application most product types, tool has excellent property can. 但PA66 melting point relatively high, processing temperature degree scope/range narrow, 而PA6 impact strong/high degree low, this will made in certain field/area application. if adipic acid hexamethylenediamine salt (AH Salt) and caprolactam (CPL) is raw materials, through copolymer modified made 备PA66/6, combined excellent property can, will has wide PA66/6 application areas.

         currently inner outer for/regarding PA66/6 research large more in in raw materials 以CPL or AH Salt is mono system, CPL and AH Salt配 ratio in small scope/range inner modified, large using/adopting melt polycondensation method, 以AH Salt, CPL is raw materials, made full scope/range series ratio PA66/6, system research its structure and property can, is PA66/6 product development and application provide necessary data.

         using/adopting Raw Materials lower

        AH Salt, CPL: industrial grade, BASF (China) has company;

         adipic acid (ADA): analysis pure, group chemical agent has company;

         离子 water (H2O): made.

         Sample is this made 备

        按 table/sheet 1 formulation will Raw Materials add high temperature high pressure reaction in, nitrogen gas 15 min以排出釜 inner gas;排 gas rear reaction 釜, 开启搅拌, speed is 100 r/min, in 1 h inner rise temperature 至210～220℃, maintain pressure is 1.8～1.85 MPa; holding pressure rear 打开排 gas 阀, in 1 h left right pressure 至0 MPa, rise temperature to 260～265℃;抽 true 空至釜 inner pressure is – 0.5 MPa, 进一步 improve/increase copolymer polymerization degree, rear belt/tape, pellet cutting, to PA66/6粒 material. will PA66/6 in 约100℃恒 temperature water in 萃取48 h, remove reaction caprolactam mono and oligomer, will rear copolymer 放入60℃鼓风烘箱 in drying 24 h remove surface water separation. will 萃取并 drying rear PA66/6置于105℃ true drying in drying 24 h, remove its surface and structure inner 无定形区残留 water separation. use injection molding mechanism tensile strip/profile, mold temperature degree is 30℃, material temperature degree high sample melting point 20℃ left right, injection molding pressure is 0.9 MPa, holding pressure time is 10 s.

         property can summary lower

        (1) copolymer mono 体 引入 make PA66/6 separation 子链规整 property reduce, separation function force decrease small, its separation structure 以α晶 type is 主, 当AH Salt and CPL quality ratio 接近1∶1时, has 利于形 formed unstable γ晶 type.

        (2) in copolymer reaction process in, 随第二 types mono add 入, made 备PA66/6 melting point, crystallization degree, tensile strength decline, fracture elongation improve/increase, heat stabilized property good.

        (3)当AH Salt and CPL quality ratio is 40∶60时, PA66/6 melting point drop 至169.7℃, crystallization degree is 16.2%, tensile strength is 33.9 MPa, fracture elongation improve/increase 至122.9%, high pure PA66 and pure PA6, table/sheet copolymer reaction can improvement PA66/6 processing properties has improve/increase its tough property.