通过有机催化开环聚合制备的聚（ω-十五内酯）-聚（L-丙交酯）嵌段共聚物及其潜在应用
Poly(ω-pentadecalactone)--poly(l-lactide) Block Copolymers via Organic-Catalyzed Ring Opening Polymerization and Potential Applications.
作者信息
Todd Richard, Tempelaar Sarah, Lo Re Giada, Spinella Stephen, McCallum Scott A, Gross Richard A, Raquez Jean-Marie, Dubois Philippe
机构信息
Centre of Innovation and Research in Materials & Polymers CIRMAP, Laboratory of Polymeric and Composite Materials, University of Mons, Place du Parc 23, B-7000 Mons, Belgium.
Department of Chemistry and Biology, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute (RPI), 4005B BioTechnology Building, 110 Eighth Street, Troy, New York 12180, United States.
出版信息
ACS Macro Lett. 2015 Apr 21;4(4):408-411. doi: 10.1021/acsmacrolett.5b00021. Epub 2015 Mar 25.
Poly(pentadecalactone)--poly(l-lactide) (PPDL--PLLA) diblock copolymers were prepared via the organic catalyzed ring-opening polymerization (ROP) of l-lactide (l-LA) from PPDL macroinitiators using either 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) or 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD). Synthesis of PLLA blocks targeting degrees of polymerization (DP) up to 500 were found to yield diblock copolymers with crystalline PPDL and PLLA segments when TBD was used as the catalyst. The synthesis was further improved in a one-pot, two-step process using the same TBD catalyst for the synthesis of both segments. The application of these diblock copolymers as a compatibilizing agents resulted in homogenization of a biobased PLLA/poly(ω-hydroxytetradecanoate) (90:10) blend upon a melt-process, yielding enhanced material properties.
聚（十五内酯）-聚（L-丙交酯）（PPDL-PLLA）二嵌段共聚物是通过使用1,8-二氮杂双环[5.4.0]十一碳-7-烯（DBU）或1,5,7-三氮杂双环[4.4.0]癸-5-烯（TBD），从PPDL大分子引发剂引发L-丙交酯（L-LA）的有机催化开环聚合（ROP）制备的。当使用TBD作为催化剂时，发现合成聚合度（DP）高达500的PLLA嵌段会得到具有结晶PPDL和PLLA链段的二嵌段共聚物。使用相同的TBD催化剂在一锅两步法中进一步改进了两个链段的合成。这些二嵌段共聚物作为增容剂的应用导致在熔融加工时生物基PLLA/聚（ω-羟基十四烷酸酯）（90:10）共混物均匀化，从而提高了材料性能。
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