期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 43, 期 2, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.202100619
关键词
biodegradable polymers; interfacial compatibilization; mechanical properties; morphology; toughening
资金
- National University of Singapore (NUS)
- Ministry of Education (MoE) of Singapore
The addition of PMMA to PLLA/PHB blends transforms the morphology of the blends by forming an interfacial nanolayer, leading to significantly increased elongation and toughness while maintaining high stiffness and strength. This generic strategy can be applied to design other mechanically robust biocomposites for advanced green devices.
Bio-based and biodegradable polymer composites, most notably poly(l-lactic acid) (PLLA) and poly(3-hydroxybutyrate) (PHB), represent a promising solution to replace conventional petroleum-based plastics. However, the brittleness and low miscibility of PLLA and PHB remain two major obstacles to practical applications. In this work, first PLLA/PHB blends are reported by melt mixing with a rigid component, poly(methyl methacrylate) (PMMA). Driven by favorable entropy, PMMA forms an interfacial nanolayer, which transforms the morphology of resultant blends. The ternary blends show 55-fold increase in elongation, 50-fold in toughness, and metal-like malleability (approximate to 180 degrees bending and twisting), while retaining its high stiffness (3.4 GPa) and strength (approximate to 50 MPa). The mechanical improvement arises from numerous craze fibrils and shear deformation of the matrix, induced by the incorporated PMMA. Furthermore, this generic strategy can be applied to design other mechanically robust biocomposites for advanced green devices.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据