Earticle

초록

영어

Environmental problems from petroleum-based plastic wastes have been rapidly increasing in recent years. The alternative solution is focus on the development of environmental friendly plastic derived from renewable resource. Poly(lactic acid) (PLA) is a biodegradable polymer synthesized from biomass having potential to replace the petroleum-based non-degradable polymers utilizations. PLA can be synthesized by two methods: (1) ring-opening of lactide intermediate and (2) direct polycondensation of lactic acid processes. The latter process has advantages on high yields and high purity of polymer products, materials handling and ease of process treatments. The polymerization process of PLA synthesis has been widely studied in a laboratory scale. However, the mass scale production using direct polycondensation of lactic acid has not been reported. We have investigated the kinetics and scale-up process of direct polycondensation method to produce PLA in a pilot scale. The order of reaction is 2 and activation energy of lactic acid to lactic acid oligomers is 61.58 kJ/mol. The pre-polymer was further polymerized in a solid state polymerization (SSP) process. The synthesized PLA from both the laboratory and pilot scales show the comparable properties such as melting temperature and molecular weight. The appearance of synthesized PLA is yellow-white solid powder.

목차

ABSTRACT
 1. Introduction
 2. Experimental
 3. Results and Discussion
  3.1 Kinetic study of direct polycondensation of lactic acid
  3.2 Thermal and physical properties of synthesized PLLA
  3.3 1H- NMR characterizations
 4. Conclusions
 5. Acknowledgements
 References

키워드

저자

• Sommai Pivsa-Art [ Rajamangala University of Technology Thanyaburi, Pathumthani, Thailand ] Corresponding Author
• Sumonman Niamlang [ Rajamangala University of Technology Thanyaburi, Pathumthani, Thailand ]
• Weraporn Pivsa-Art [ Rajamangala University of Technology Thanyaburi, Pathumthani, Thailand ]
• Nutchapon Santipatee [ Rajamangala University of Technology Thanyaburi, Pathumthani, Thailand ]
• Tossamon Wongborh [ Rajamangala University of Technology Thanyaburi, Pathumthani, Thailand ]
• Sorapong Pavasupree [ Rajamangala University of Technology Thanyaburi, Pathumthani, Thailand ]
• Kiyoaki Ishimoto [ Rajamangala University of Technology Thanyaburi, Pathumthani, Thailand ]
• Hitomi Ohara [ Kyoto Institute of Technology, Kyoto, Japan ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Advanced Culture Technology(IJACT)

• 간기

  계간

• pISSN

  2288-7202

• eISSN

  2288-7318

• 수록기간

  2013~2025

• 등재여부

  KCI 등재

• 십진분류

  KDC 600 DDC 700