ETHYLENE ALPHA-OLEFIN COPOLYMER AND METHOD FOR PREPARING SAME

• Main Authors: CHAE, Byung Hun, HA, Dal Yong, HONG, Younjin, LEE, Rai Ha, MIN, Kyung Dae, LEE, Kyung Yong
• Format: Patent
• Language: English; French; Korean
• Published: 30.05.2024
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

According to one embodiment of the present invention, provided is an ethylene alpha-olefin copolymer comprising an ethylene structural unit and an alpha-olefin structural unit, wherein the stress-strain curve measured by ASTM D638 includes at least two sections in which the slope of the tangent line changes, and the sections in which the slope of the tangent line changes include a first section in which the slope of the tangent line decreases and a second section in which the slope of the tangent line increases. According to one embodiment of the present invention, it is possible to provide: an ethylene alpha-olefin copolymer having excellent tensile elongation, impact strength, and flexural strength due to the structural characteristics thereof, and having excellent processability; and a method for preparing same. Selon un mode de réalisation, l'invention concerne un copolymère éthylène alpha-oléfine comprenant une unité structurale éthylène et une unité structurale alpha-oléfine, la courbe contrainte-déformation mesurée par la norme ASTM D638 comprenant au moins deux sections dans lesquelles la pente de la ligne tangente change, et les sections dans lesquelles la pente de la ligne tangente change comprennent une première section dans laquelle la pente de la ligne tangente diminue et une seconde section dans laquelle la pente de la ligne tangente augmente. Selon un mode de réalisation de la présente invention, il est possible de fournir : un copolymère d'éthylène alpha-oléfine ayant un excellent allongement à la traction, une excellente résistance aux chocs et une excellente résistance à la flexion en raison des caractéristiques structurales de celui-ci, et ayant une excellente aptitude au traitement ; ainsi que son procédé de préparation. 본 발명의 일 구현예에 따르면, 에틸렌 구조 단위 및 알파-올레핀 구조 단위를 포함하는 에틸렌 알파-올레핀 공중합체에 있어서, ASTM D638에 의해 측정된 응력-변형률 선도(Stress-strain curve)에서 접선의 기울기가 변화하는 구간이 2 이상 나타나고, 상기 접선의 기울기가 변화하는 구간은 접선의 기울기가 감소하는 제1구간; 및 접선의 기울기가 증가하는 제2구간을 포함하는 에틸렌 알파-올레핀 공중합체가 제공된다. 본 발명의 일 구현예에 따르면, 구조적인 특징에 의해 뛰어난 인장 신율, 충격 강도 및 굴곡강도를 가지며, 가공성이 우수한 에틸렌 알파-올레핀 공중합체 및 이의 제조방법을 제공할 수 있다.