Environmental-Friendly Catalyzed Synthesis of Poly(lactic acid-co-citric acid) by Macro Resin Solid Acid Using Direct Melt Polycondensation
In order to prepare a new material with good biocompatibility, poly(lactic acid)-citric acid (PLCA) copolymer was prepared by direct copolymerization using macroporous resin as catalyst. Experimental comparison of the catalytic properties of different types of macroporous resin—Amberlyst
(A), the order of the catalytic efficiency is: A-70 > A-15 > A-35 > A-36, the main cause of the catalytic performance difference is the proportion of different resin halogen element content is different, and heat resistance performance of different catalysts.
The copolymerized products were analyzed by IR, NMR, XRD, and DSC, respectively. The preparation of poly(lactic acid), citric acid copolymer PLCA crystal configurations and poly(L-lactic acid) (PLLA) are similar, but the crystallinity and heat temperature slightly lower than that of PLLA,
and heat resistance, the crystallinity of the same type of PLCA were positively correlated, high crystallinity, is its high heat resistance.
Keywords: CATALYZE; MACRO RESIN; MELT POLYCONDENSATION; POLY(LACTIC ACID-CO-CITRIC ACID); SOLID ACID
Document Type: Research Article
Publication date: 01 January 2019
- Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Ingenta Connect is not responsible for the content or availability of external websites
- Access Key
- Free content
- Partial Free content
- New content
- Open access content
- Partial Open access content
- Subscribed content
- Partial Subscribed content
- Free trial content