바이오 기반 폴리머가 포함된 블렌드의 상압 및 가압 발포 연구
Study of non pressure condition for manufacturing foam
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
발포체를 성형하기 위한 방법으로는 여러 가지 방법이 있는데 일반적으로 가장 많이 사용되는 방법으로는 발포제를 섞은 레진을 고온, 고압상태에서 발포하는 가압발포 방법과, 압을 주지 않은 고온의 상태에서 발포하는 상압발포 방법이 있다. 발포에 사용되는 고분자들은 상압상태에서 발포를 시키기 위해서는 최적 발포조건에 대한 설계 및 분석이 필요하다. 친환경 바이오 기반 폴리머는 단독으로는 발포가 힘든 문제가 있어 기존의 발포체 제조가 가능한 수지를 혼합하여 발포체를 제조하는 연구가 진행되고 있다. 본 연구에서는 바이오 기반 고분자의 함량 변화에 따른 바이오 기반 고분자와 EVA 혼합 발포체의 특성변화에 대해서 연구하였으며 가교도에 따른 최적 발포 조건에 대해서 연구하였다. 발포체의 기계적 특성 분석을 통해서 발포특성과의 상관관계에 대해서 연구하였다. 이 연구를 통해 바이오 기반 폴리머의 함량이 바이오 기반 폴리머가 포함된 발포체의 물성에 어떤 영향을 미치는지 알 수 있었고 상압 및 가압 발포 공정에 따른 차이점을 확인할 수 있었다. 또한, 바이오 기반 폴리머-EVA 복합 발포체의 상용화 가능성을 확인하였다
Abstract
There are several methods for shaping foams, but the most commonly used methods involve the use of resin mixed with a foaming agent, which is then foamed under high temperature and pressure in the case of compression foaming, or foamed under high temperature without applying pressure in the case of atmospheric foaming. The polymers used for foaming require design and analysis of optimal foaming conditions in order to achieve foaming under ambient pressure. Environmentally friendly bio-based polymers face challenges when it comes to foaming on their own, which has led to ongoing research in blending them with resins capable of traditional foam production. This study investigates changes in the characteristics of bio-based polymer-EVA blend foams based on variations in the content of bio-based polymers and explores the optimal foaming conditions according to cross-linking. The correlation between foaming characteristics and mechanical properties of the foams was examined. Through this research, we gained insights into how the content of bio-based polymers affects the properties of foams containing bio-based polymers and identified differences between ambient pressure and high-pressure foaming processes. Additionally, the feasibility of commercializing bio-based polymer-EVA composite foams was confirmed.
참고문헌 (22)
- Narayan, R., "Drivers & Rationale for Use of Biobased Materials Based on Life Cycle Assessment (LCA)", Global Plastics Environmental Conference (2004)
- Garlotta, D., "A Literature Review of Poly(Lactic Acid)", Journal of Polymers and the Environment, 9(2), pp.63~84 (2001)
- Bitinis, N., "Structure and Properties of Polylactide", natural Rubber Blends, 2011, pp.129(3), 823~831
- Xu, C., "Physical Blend of PLA", NR with Co-continuous Phase Structure : Preparation, Rheology Property, Mechanical Properties and Morphology, 2014, pp.37, 94~101
- Pongtanayut, K., "The Effect of Rubber on Morphology, Thermal Properties and Mechanical Properties of PLA", NR and PLA, Energy Procedia, pp.2013, 34[DOI]
- Grijpma, D. W., "Rubber Toughening of Poly(lactide)by Blending and Block Copolymerization", Polymer Engineering and Science, 34(22), pp.1674~1684 (1994)
- Hiljanen-Vainio, M., "Biodegradable Lactone Copolymers. I. Characterization and Mechanical Behavior of Ε‐caprolactone and Lactide Copolymers", Journal of Applied Polymer Science, 59(8), pp.1281~1288 (1996)
- Gramlich, W. M., "Reactive Compatibilization of Poly(L-lactide)and Conjugated Soybean Oil", Macromolecules, 43(5), pp.2313~2321 (2010)
- Ljungberg, N., "Preparation and Properties of Plasticized Poly(Lactic Acid)Films", Biomacromolecules, 6(3), pp.1789~1796 (2005)
- Noda, I., "Polymer Alloys of Nodax Copolymers and Poly(Lactic Acid)", Macromolecular Bioscience, 4(3), pp.269~275 (2004)
- Byrne, N., "The Preparation of Novel Nanofilled Polymer Composites Using Poly(Llactic Acid)and Protein Fibers", European Polymer Journal, 47(6), pp.1279~1283 (2011)
- Broz, M. E., "Structure and Mechanical Properties of Poly(D, L-lactic Acid)", Poly(εcaprolactone)Blends, 2003, pp.24(23), 4181~4190
- Anderson, K. S., "The Influence of Block Copolymer Microstructure on the Toughness of Compatibilized Polylactide", Polyethylene Blends, 2004, pp.45(26), 8809~8823
- Li, Y. J., "Toughening of Polylactide by Melt Blending With a Biodegradable Poly(Ether)Urethane Elastomer", Macromolecular Bioscience, 7(7), pp.921~928 (2007)
- Bioki, H. A., "Effect of Crystallinity and Irradiation on Thermal Properties and Specific Heat Capacity of LDPE & LDPE", EVA, 2012, pp.70(1), 1~5
- Lippa, N., "Mechanical Ageing Protocol Selection Affects Macroscopic Performance and Molecular Level Properties of Ethylene Vinyl Acetate(EVA)Running Shoe Midsole Foam", Procedia Engineering, 72, pp.285~291 (2014)
- Kim, M. S., "Physical Properties of Ethylene Vinyl Acetate Copolymer(EVA)", Natural Rubber(NR)Blend Based Foam, 2004, pp.94(5), 2212~2216
- Rezaeian, I., "Improvements of Physical and Mechanical Properties of Electron Beam Irradiation-crosslinked EVA Foams", Polymers for Advanced Technologies, 20(5), pp.487~492 (2008)
- Gajria, A. M., "Miscibility and Biodegradability of Blends of Poly(Lactic Acid)and Poly(Vinyl Acetate)", Polymer, 37(3), pp.437~344 (1996)
- Yoon, J. S., "Thermal and Mechanical Properties of Poly(L-lactic Acid)-poly(Ethylene-co-vinyl Acetate)Blends", Polymer, 40(9), pp.2303~2312 (1999)
- Ma, P., "Toughening of Poly(Lactic Acid)by Ethylene-co-vinyl Acetate Copolymer with Different Vinyl Acetate Contents", European Polymer Journal, 48(1), pp.146~154 (2012)
- Han, D. H., "Ethylene Vinyl Acetate(EVA)", Poly(Lactic Acid)(PLA)Blends and Their Foams, 2020, pp.707(1), 38~45