The synthesis, characterization of opal-poly(methyl methacrylate) graft polymer based on ICAR-ATRP and its effect on performance of poly (lactic acid)

2021 ◽  
Vol 60 (10) ◽  
pp. 1051-1065
Author(s):  
Dawei Luo ◽  
Gaowei Lei ◽  
Weijun Zhen ◽  
Ling Zhao
Keyword(s):  
Lactic Acid ◽  
Methyl Methacrylate ◽  
Poly Lactic Acid ◽  
Graft Polymer ◽  
Poly Methyl Methacrylate

Preparation and characterization of composites based on poly(lactic acid)/poly(methyl methacrylate) matrix and sisal fiber bundles: The effect of annealing process

2020 ◽  
pp. 089270572093078
Author(s):  
Ander Orue ◽  
Jon Anakabe ◽  
Ane Miren Zaldua-Huici ◽  
Arantxa Eceiza ◽  
Aitor Arbelaiz
Keyword(s):  
Lactic Acid ◽  
Methyl Methacrylate ◽  
Polymer System ◽  
Annealing Process ◽  
Sisal Fiber ◽  
Maximum Temperature ◽  
Poly Lactic Acid ◽  
Poly Methyl Methacrylate ◽  
Sisal Fibers

The interest on poly(lactic acid) (PLA)/poly(methyl methacrylate) (PMMA) blends has increased during the last years due to their promising properties. The novelty of the current work focuses on the preparation and characterization of biocomposites based on PLA/PMMA matrix and NaOH-treated sisal fibers. The effect of the addition of treated sisal fibers on the physico-mechanical properties of high polylactide content composites was studied. For this purpose, PLA/PMMA blend (80/20 wt%) was prepared by melt-blending and reinforced with different fiber contents. Although composites showed interesting specific tensile properties, the estimated heat deflection temperature (HDT), that is, the maximum temperature at which a polymer system can be used as a rigid material, barely increased 4°C respect to unreinforced system. After the annealing process, the HDT of the unreinforced polymer blend increased around 25°C, whereas the composites showed an increase of at least 38°C. Nonetheless, the specific tensile strength of composite decreased approximately 48% because the adhesion between fiber and polymer matrix was damaged and cracks were formed during annealing process.

Helix-Sense-Selective Encapsulation of Helical Poly(lactic acid)s within a Helical Cavity of Syndiotactic Poly(methyl methacrylate) with Helicity Memory

2020 ◽  
Vol 142 (52) ◽  
pp. 21913-21925
Author(s):  
Tomoyuki Ikai ◽  
Satoshi Kawabata ◽  
Fumihiko Mamiya ◽  
Daisuke Taura ◽  
Naoki Ousaka ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Methyl Methacrylate ◽  
Poly Lactic Acid ◽  
Poly Methyl Methacrylate
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