| Autor: |
LI Shi-hong, WU Jun-fei, JIN Yu-shun, WU Yi-bo, LIAN Hui-qin |
| Jazyk: |
čínština |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Hecheng xiangjiao gongye, Vol 45, Iss 5, Pp 351-356 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
1000-1255 |
| DOI: |
10.19908/j.cnki.ISSN1000-1255.2022.05.0351 |
| Popis: |
Using stannous octanoate as catalyst and 1,4-butanediol as initiator, ring-opening polymerization of ε-caprolactone and DL-lactide was carried out to prepare ε-caprolactone and DL-lactide copolymer with hydroxyl groups at both ends (PCDLA-OH prepolymer), and then L-lactide ring-opening polymerization was initiated by PCDLA-OH prepolymer to prepare triblock copolymer with poly L-lactide segments at both ends and ε-caprolactone and DL-lactide copolymer in the middle (PLLA-b-PCDLA-b-PLLA) was prepared, and the structure and properties of the block copolymer were tested. The results showed that the larger the amount of DL-lactide in PCDLA-OH prepolymer, the prepolymer gradually changed from partial crystallization to amorphous polymer, and the glass transition tempe-rature gradually increased. When the mole ratio of DL-lactide to ε-caprolactone was 3/10 and the mass ratio of PCDLA-OH prepolymer to L-lactide was 1/5, the elongation at break and tensile strength of the prepared PLLA-b-PCDLA-b-PLLA were 204% and 4.77 MPa. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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