聚酰胺PACM12-PA66共聚物的制备及其性能研究

Preparation and Properties of( Imino-1,4-cyclohexylenemethylene-1,4-cyclohexyleneimino dodecanedicarboxyl)-co-( iminohexyleneiminohexanedicarboxyl) Copolymers

以4,4’-二胺基二环己基甲烷、十二碳二酸、己二酸己二胺盐为反应单体制备了（亚氨基-1,4-亚环己基亚甲基-1,4-亚环己基亚氨基十二碳二酰）-co-（亚氨基亚己基亚氨基己二酰）共聚物材料（PACM12-PA66）,并研究了其光学性能和力学性能.光学性能研究表明,当PACM12含量高于40%时,为可见光（400～800 nm）透光度良好的高分子材料,其透光度与纯PA PACM12材料相当;共聚物材料的折光指数随PACM12含量的降低而略微增加.XRD结果分析表明,随PACM12含量的降低共聚物材料的晶粒尺寸变大,这是透光度降低的原因.力学性能研究表明,共聚物材料拉伸强度和冲击强度随PACM12含量的降低而增加.当PACM12含量为40%时,共聚物材料拉伸强度值（64.28 MPa）和冲击强度值（14 kJ/m2）分别比纯PACM12材料提高了16%和33%。

（ Imino-1, 4-cyclohexylenemethylene-1, 4-cyclohexyleneiminododecanedicarboxyl）-co-（ iminohexylimioheanedicarboxyl） copolymers（ PACM12-PA66） were prepared by using 4,4＇-diaminodicyclohexyl methane,dodecanedioicacid and hexanedicarboxylhexanediamino salt as the comonomers.A series of PACM12-PA66 copolymers with various PACM12 contents were prepared,and their optical and mechanical properties were studied. The results show that,when the PACM12 content was higher than 40%,the copolymer materials were transparent within the wavelength of visible light（ 400 ～ 800 nm）. The high transparency of the transparent materials didn＇t decrease after heat treatment. The refractive index of the copolymers was not relative to the PACM12 content,verifying that the copolymer with PACM12 content higher than 40% had similar crystal structure,so that there was not obvious difference of refractive index among the materials. The WXRD results showed that the crystal size of copolymer materials became larger,and the crystal became more perfect as the PACM12 content decreased,while the degree of crystallinity first decreased and then increased. All of the results tested by DSC and WXRD described that the transparent copolymers with PACM12 content at 40%,75% and 100% owned a special crystal behavior,the quenched materials were almost amorphous then turned to microcrystal structure after being heat treated; while the copolymer with 34%PACM12 was easily crystallized,as a result the material lost its transparency and became opaque. Both tensile strength and impact strength of the copolymer materials are gradually improved with increasing PACM12content. For copolymer materials with 40% PACM12 content,the tensile strength（ 64. 28 MPa） increases by40% and the impact strength（ 14 kJ /m2） increases by 33% than those of PACM12.