CAJ | 학술논문

通过在无规共聚聚丙烯(PP–R)中添加不同的改性剂制备PP–R管材专用料。采用差示扫描量热分析、动态力学分析、扫描电子显微镜等技术，分析了不同改性剂对无规共聚聚丙烯(PP–R)管材专用料抗低温性能的影响规律。结果表明，在–10～0℃低温条件下，与未改性的PP–R材料比较，PP–R／聚烯烃弹性体(POE)／高密度聚乙烯(PE–HD)共混料的低温冲击韧性最理想，其综合力学性能最好，0℃的冲击强度为58.35 kJ／m2，–10℃的冲击强度也高达47.06 kJ／m2。POE／PE–HD在不降低PP–R管材专用料其它力学性能的基础上，显著地提高了PP–R管材专用料低温冲击韧性。
통과재무규공취취병희(PP–R)중첨가불동적개성제제비PP–R관재전용료。채용차시소묘량열분석、동태역학분석、소묘전자현미경등기술，분석료불동개성제대무규공취취병희(PP–R)관재전용료항저온성능적영향규률。결과표명，재–10～0℃저온조건하，여미개성적PP–R재료비교，PP–R／취희경탄성체(POE)／고밀도취을희(PE–HD)공혼료적저온충격인성최이상，기종합역학성능최호，0℃적충격강도위58.35 kJ／m2，–10℃적충격강도야고체47.06 kJ／m2。POE／PE–HD재불강저PP–R관재전용료기타역학성능적기출상，현저지제고료PP–R관재전용료저온충격인성。
By adding different modifiers into polypropylene random copolymer(PP–R),the pipe dedicated materials of PP–R were prepared. The influence rules of low-temperature crack resistance of different modifiers in PP–R were analyzed by means of differential scanning calorimetry,dynamic mechanical analysis,scanning electron microscope,and other testing technologies.The results show that comparing with unmodified PP–R materials,PP–R/POE/high density polyethylene(PE–HD) blend indicates desired impact toughness and the relative better comprehensive mechanical properties under low temperature about–10 to 0℃. The impact strength of 0℃is 58.35 kJ/m2 and the impact strength of–10℃is also up to 47.06 kJ/m2. Therefore,POE/PE–HD, significantly improve the performance of impact toughness at low temperature without reducing other mechanical properties of PP–R pipe dedicated materials.