Jeong Jieun, Yoon Sangsoo, Yang Xin, Kim Young Jun
School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea.
Key Laboratory for Light-Weight Materials, Nanjing Tech University, Nanjing 210009, China.
Polymers (Basel). 2023 Jun 8;15(12):2617. doi: 10.3390/polym15122617.
To obtain fully degradable and super-tough poly(lactide-co-glycolide) (PLGA) blends, biodegradable star-shaped PCL--PDLA plasticizers were synthesized using natural originated xylitol as initiator. These plasticizers were blended with PLGA to prepare transparent thin films. Effects of added star-shaped PCL--PDLA plasticizers on mechanical, morphological, and thermodynamic properties of PLGA/star-shaped PCL--PDLA blends were investigated. The stereocomplexation strong cross-linked network between PLLA segment and PDLA segment effectively enhanced interfacial adhesion between star-shaped PCL--PDLA plasticizers and PLGA matrix. With only 0.5 wt% addition of star-shaped PCL--PDLA (Mn = 5000 g/mol), elongation at break of the PLGA blend reached approximately 248%, without any considerable sacrifice over excellent mechanical strength and modulus of PLGA.
为了获得完全可降解且超坚韧的聚（丙交酯-共-乙交酯）（PLGA）共混物，以天然来源的木糖醇为引发剂合成了可生物降解的星形聚己内酯-聚-D-丙交酯（PCL--PDLA）增塑剂。将这些增塑剂与PLGA共混以制备透明薄膜。研究了添加的星形PCL--PDLA增塑剂对PLGA/星形PCL--PDLA共混物的力学、形态和热力学性能的影响。聚-L-丙交酯（PLLA）链段和聚-D-丙交酯（PDLA）链段之间的立体络合强交联网络有效地增强了星形PCL--PDLA增塑剂与PLGA基体之间的界面粘附力。仅添加0.5 wt%的星形PCL--PDLA（Mn = 5000 g/mol），PLGA共混物的断裂伸长率就达到了约248%，在不显著牺牲PLGA优异的机械强度和模量的情况下实现了这一效果。
