Mechanical and thermal properties of polylactic acid blended with recycled polymethyl methacrylate

被引：0

作者：

Dehghani, Samaneh ^{[1
]}

Salehiyan, Reza ^{[2
]}

Pholharn, Dutchanee ^{[3
]}

Srithep, Yottha ^{[1
]}

机构：

[1] Mahasarakham Univ, Fac Engn, Dept Mfg Engn, Mfg & Mat Res Unit, Maha Sarakham, Thailand

[2] Edinburgh Napier Univ, Sch Comp Engn & Built Environm, Edinburgh, Scotland

[3] Rajabhat Mahasarakham Univ, Fac Sci & Technol, Dept Rubber & Polymer Technol, Maha Sarakham, Thailand

来源：

POLYMER ENGINEERING AND SCIENCE | 2025年

关键词：

biocompatibilizer; mechanical properties; phone screens; polylactic acid; recycled polymethyl methacrylate; POLY(METHYL METHACRYLATE); PMMA; COMPOSITES; BEHAVIOR; FILMS; PLA;

D O I：

10.1002/pen.27141

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

This study investigates the effect of incorporating recycled polymethyl methacrylate (r-PMMA) into polylactic acid (PLA) and further modifications with a bio-based compatibilizer (epoxidized soybean oil [ESO]). Various PLA:r-PMMA ratios were evaluated, with and without ESO. Blending r-PMMA into PLA significantly influenced mechanical properties. The 10PLA90r-PMMA blend showed enhanced elongation at break (6.10%) and tensile toughness (1686 kJ/m3) compared to pure PLA (3.34% and 737 kJ/m3, respectively), addressing PLA's inherent brittleness. The 30PLA70r-PMMA composition exhibited a tensile strength (TS) of 51.44 MPa and significant tensile toughness (1237 kJ/m3). Thermal analysis revealed an increase in the glass transition temperature (Tg) with higher r-PMMA content, reaching 124 degrees C for 100r-PMMA, and a decrease in crystallinity percentage from 68.17% (pure PLA) to 30.43% (50PLA50r-PMMA). Incorporating ESO into a 50 PLA50r-PMMA blend modified its properties. Adding 3 parts per hundred resins (phr) ESO improved elongation at break (5.68%) and tensile toughness (1302 kJ/m3) while reducing TS (35.03 MPa). At 6 phr ESO, flexibility was maximized with an elongation of 6.37%, but TS decreased to 26.89 MPa. These findings highlight the synergy between r-PMMA and ESO in enhancing PLA's performance for sustainable applications and balancing mechanical and thermal properties while addressing environmental challenges.Highlights r-PMMA enhances PLA elongation (6.10%) & toughness (1686 kJ/m3) in blends. Pure PLA has 68.17% crystallinity; r-PMMA lowers it to 30.43% in 50PLA50r-PMMA. High r-PMMA content erases melting peaks, indicating minimal PLA crystallinity. ESO boosts crystallization; 6 phr ESO in 50PLA50r-PMMA increases it to 31.72%. r-PMMA in PLA promotes sustainability via waste reuse & eco-friendly materials.

引用

页码：2119 / 2132

页数：14

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