结晶条件对PA1010/6球晶形态的影响

在正交偏光显微镜(PLM)和扫描电镜(SEM)下观察了不同结晶条件下PA1010/6共聚物结晶及球晶形态.Tm-20℃恒温结晶条件下,1#、2#、3#样品PLM下可以观察到正环状球晶,但球晶尺寸逐渐减小,4#、5#、6#视野很暗,说明结晶度不高;7#、8#、9#、10#、11#样品中PA6含量占绝对优势,视野亮说明结晶度相对较高,但除9#样品外没有观察到球晶特征.Tm-10℃恒温结晶条件下,1#、2#样品PLM下可以观察到正环状球晶,而3#样品是负放射性球晶,4#、5#、6#视野很暗;7#到10#样品能观察到不规整的放射状负球晶,而11#样品观察不到球晶结构.自然降温结晶条件下,1#样品PLM下观察到混合光性放射状球晶,而2#样品视野稍暗,且球晶为带消光环的正光性球晶,3#样品视野更暗,也无球晶特征;4#、5#、6#样品视野视野仍然很暗;从7#到10#样品亮度依次增加,能观察到不规整的放射状负球晶,11#样品仍然观察不到球晶结构.SEM下对比研究7#和9#样品,表明7#样品结晶区小,而9#样品有比较大的结晶区.

The Effect of Crystallization Process on Spherulite Morphology of PA1010/6 Copolymers

The spherulite morphology of PA1010/6 crystallizing at different conditions was studied by PLM and SEM.Crystallizing at constant temperature(Tm-20℃),the proportionally cyclic spherulite could be abserved in 1#,2# and 3# samples by PLM,and the size of spherulite descended with the content of PA6 increasing,but no spherulite could be abserved in 4#,5# and 6# samples with low crystallinity,and 7#,8#,10# and 11# samples with high crystallinity crystallizing at the same condition except 9# sample.Crystallizing at constant temperature(Tm-10℃),the proportionally cyclic spherulite could be also abserved in 1# and 2# samples but 3# sample negatively cyclic spherulite,and from 7# up to 10# sample the negstively cyclic spherulite could be also abserved by PLM.In natural cooling samples,the proportionally optical cyclic spherulite with extinction cyclic could be abserved in 2# sample and no spherulite in 3#,4#,5# and 6# samples,but divergient spherulite could be abserved in 7# up to 10# samples.The crystallizing dimension was larger in 7# than 9# sample abserved by SEM.