Cov khoom

Blends ntawm polypropylene (PP) thiab polyamide 6 (PA6) nrog multiwalled carbon nanotubes (MWNTs) tau npaj siv cov tswv yim sib txawv nyob rau hauv ib tug ntxaib-ntsia hlau micro-compounder.Cov txiaj ntsig ntawm MWNTs ntawm kev coj tus cwj pwm crystallization ntawm PP theem thiab PA6 theem ntawm kev sib xyaw tau raug tshawb xyuas los ntawm cov kev tshawb fawb uas tsis yog isothermal crystallization los ntawm qhov sib txawv scanning calorimetric tsom xam.Tsis tas li ntawd, cov nyhuv ntawm kev sib ntxiv ntawm cov compatibilizer (PP-g-MA) thiab kev hloov kho ntawm MWNTs (m-MWNTs) nrog cov tsis-covalent organic modifier (Li-salt ntawm 6 amino hexanoic acid, Li-AHA) kuj muaj. tau kawm nyob rau hauv cov ntsiab lus rau crystallization tus cwj pwm ntawm PP thiab PA6 theem nyob rau hauv lub blend.Cov kev tshawb fawb crystallization tau qhia tias muaj kev nce ntxiv hauv cov crystallization kub ntawm PP theem hauv kev sib xyaw nrog MWNTs.Ntxiv mus, qhov tsim ntawm 'trans-lamellar crystalline' qauv muaj xws li PA6 'trans-crystalline lamellae' ntawm MWNTs nto tau yooj yim nyob rau hauv cov ntaub ntawv ntawm blends npaj los ntawm ' raws tu qauv 2' piv rau cov sib xyaw ua ke npaj ntawm ' raws tu qauv 1 ' .Lub dav dav X-ray diffraction tsom xam tau pom tias muaj β-polymorph ntawm PP theem vim muaj kev koom ua ke ntawm PA6 theem hauv kev sib xyaw.Ntxiv ntawm MWNTs hauv cov khoom sib xyaw tau yooj yim ntxiv β-crystalline qauv tsim ntawm PP theem.Nyob rau hauv lub xub ntiag ntawm m-MWNTs, ib tug ntau dua β-feem feem raug pom nyob rau hauv lub PP theem raws li muab piv rau cov sib tov nrog pristine MWNTs.Ntxiv ntawm PP-g-MA tau suppressed lub β-theem tsim nyob rau hauv lub PP theem nyob rau hauv lub blend.X-ray bulk kev ntxhib los mos tsom pom tau hais tias kev koom ua ke ntawm PA6 nrog rau cov pristine / hloov kho MWNTs tau cuam tshuam qhov kev taw qhia ntawm PP chains rau cov dav hlau crystalline hauv ntau qhov sib xyaw ntawm PP thiab PA6.