CAJ | 학술논문

采用硬脂酸对轻质碳酸镁进行表面改性，再将改性后的轻质碳酸镁分别加入PP和HDPE中，制备出相应的轻质碳酸镁/PP和轻质碳酸镁/HDPE复合材料。为改善复合材料的力学性能，将POE加入到轻质碳酸镁/PP和轻质碳酸镁/HDPE复合材料中，制备出相应的轻质碳酸镁/PP/POE和轻质碳酸镁/HDPE/POE复合材料。探讨了硬脂酸用量、改性温度、改性时间对改性效果的影响。测定了改性轻质碳酸镁的沉降体积、吸油值和活化度并用红外光谱和热失重进行表征。最终确定了最佳改性条件。硬脂酸用量为2%，改性时间为50 min，改性温度为75℃。
채용경지산대경질탄산미진행표면개성，재장개성후적경질탄산미분별가입PP화HDPE중，제비출상응적경질탄산미/PP화경질탄산미/HDPE복합재료。위개선복합재료적역학성능，장POE가입도경질탄산미/PP화경질탄산미/HDPE복합재료중，제비출상응적경질탄산미/PP/POE화경질탄산미/HDPE/POE복합재료。탐토료경지산용량、개성온도、개성시간대개성효과적영향。측정료개성경질탄산미적침강체적、흡유치화활화도병용홍외광보화열실중진행표정。최종학정료최가개성조건。경지산용량위2%，개성시간위50 min，개성온도위75℃。
The surface of light magnesium carbonate was modified by stearic acid, then modified light magnesium carbonate was respectively added to PP and HDPE to prepare light magnesium carbonate/PP composites and light magnesium carbonate/HDPE composites. In order to improve the mechanical properties of the composites, POE was respectively added to light magnesium carbonate/PP composites and light magnesium carbonate/HDPE composites to prepare light magnesium carbonate/PP/POE composites and light magnesium carbonate/HDPE/POE composites. The influence of stearic acid dosage,modifying temperature and modifying time on modification results was investigated;Settling volume, oil absorption value and activation grade of the modified light magnesium carbonate were measured and characterized by the infrared spectrum and thermal gravimetric analysis. At last,the optimum modification conditions were determined as follows:stearic acid dosage 2%, the modification time 5min and the modification temperature 75 °C.