RING-OPENING BULK-MELT POLYMERIZATION OF POLY (L-LACTIDE)

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DARESTANI FARAHANI H.; MOBEDI H.; ABTAHI M.; PALASHI M.; ENTEZAMI A.A.

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Journal: Iranian Journal of Polymer Science and Technology Year:2003 | Volume:16 | Issue:4 (ISSUE NO. 66) Page(s): 241-248

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Information Journal Paper

Title

RING-OPENING BULK-MELT POLYMERIZATION OF POLY (L-LACTIDE)

Author(s)

Keywords

POLYLACTIDEQ2

POLYACTIC ACIDQ3

BULK-MELT POLYMERIZATIONQ4

RING-OPENING POLYMERIZATIONQ4

LACTIDEQ3

Abstract

Poly (L-lactide) is a chiral crystalline and biodegradable polymer. High molecular weight poly (L-lactide) is preferred in the production of surgical implant for internal fixation. These polymers are usually synthesized from L-lactide (cyclic di-ester of L-lactic acid). For the production of poly (L-lactide), bulk polymerization is the preferred procedure, but high temperature of the reaction may cause the thermal degradation of polymer. Therefore, optimizing the temperature and the duration time of the reaction for synthesis of high molecular weight polymer are very important. It is found that polymerization time and maximum molecular weight increase with decreasing reaction temperature, but when the reaction temperature is above the melting point of polymers, degradation is more extensive and faster, therefore, when the reaction temperature is set under the melting point of polymer the maximum molecular weight and the polymerization time are slightly changed. Glass transition temperature (Tg) and melting point (Tm) increased with increasing molecular weight. Tg and Tm of obtained polymers are 65-69°C and 160-180°C, respectively.

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APA: Copy

DARESTANI FARAHANI, H., MOBEDI, H., ABTAHI, M., PALASHI, M., & ENTEZAMI, A.A.. (2003). RING-OPENING BULK-MELT POLYMERIZATION OF POLY (L-LACTIDE). IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 16(4 (ISSUE NO. 66)), 241-248. SID. https://sid.ir/paper/6506/en

Vancouver: Copy

DARESTANI FARAHANI H., MOBEDI H., ABTAHI M., PALASHI M., ENTEZAMI A.A.. RING-OPENING BULK-MELT POLYMERIZATION OF POLY (L-LACTIDE). IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)[Internet]. 2003;16(4 (ISSUE NO. 66)):241-248. Available from: https://sid.ir/paper/6506/en

IEEE: Copy

H. DARESTANI FARAHANI, H. MOBEDI, M. ABTAHI, M. PALASHI, and A.A. ENTEZAMI, “RING-OPENING BULK-MELT POLYMERIZATION OF POLY (L-LACTIDE),” IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), vol. 16, no. 4 (ISSUE NO. 66), pp. 241–248, 2003, [Online]. Available: https://sid.ir/paper/6506/en

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