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제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Mechanical Properties of PLA and Random (Styrene-co-sulfonate) Ionomer Blends

2019년 8월 21일 10시 41분 12초
POLY.P-22 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 18일 (금요일) 11:00~12:30
Polymer Chemistry
저자 및
Joon-Seop Kim*, Sang Hui Park1, YoonGwan Jeong2
Department of Polymer Science and Engineering, Chosun University, Korea
1Chosun University, Korea
2Department of Polymer chemistry Engineering, Chosun University, Korea
In this study, we blended PLA with a random poly(styrene-co-sulfonic acid) copolymer, where the acid groups of copolymer were completely neutralized with NaOH and LiOH, and then examined the mechanical properties of the PLA blend as a function of temperature. The experimental results showed that the glass transition temperature (Tg) of PLA was lowered by 4 ℃ and above Tg the storage modulus was higher when the amount of Li-ionomer in the blend was increased to 20 wt%. However, when the ionomer neutralized with Na was blended with the PLA, the storage modulus and Tg of the PLA were not significantly changed. Therefore, this experiment showed that Li+ cation of Li-ionomer interacts with the PLA polymer chains through ion-coordination bonds, so Li-ionomer affects the physical properties of PLA. On the other hand, in the case of Na-ionomer, Na+-sulfonate ion pairs of the ionomer formed strong multiplets, and, thus, the ionomer affected the PLA properties only slightly.