A Comparative Study of Impact Fracture Toughness of Epoxidized Poly(1, 4 Cis-Isoprene) Compatibilized PLA Binary and Ternary Blends

被引：1

作者：

Bijarimi, Mohd ^{[1
]}

Ahmad, Sahrim ^{[2
]}

Ode, La ^{[1
]}

Mustaqeem, Mujahid ^{[3
]}

Norazmi, M. ^{[4
]}

Normaya, Erna ^{[4
]}

Jaafar, Jamiluddin ^{[5
]}

机构：

[1] Univ Malaysia Pahang Al Sultan Abdullah, Fac Chem & Proc Engn Technol, Kuantan 26300, Pahang, Malaysia

[2] Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Bangi 43600, Selangor, Malaysia

[3] Natl Taiwan Univ, Dept Chem, 1,Sect 4,Roosevelt Rd, Taipei 10617, Taiwan

[4] Int Islamic Univ Malaysia, Dept Chem, Expt & Theoret Res Lab ETRL, Kulliyyah Sci, Jalan Sultan Haji Ahmad Shah, Kuantan 25200, Pahang, Malaysia

[5] Univ Tun Hussein Onn Malaysia, Fac Mech & Mfg Engn, Batu Pahat 86400, Johor, Malaysia

来源：

CHEMICAL ENGINEERING & TECHNOLOGY | 2025年 / 48卷 / 02期

关键词：

Fracture toughness; Liquid natural rubber; Melt-blending; Poly(lactic acid); Polypropylene; POLY(LACTIC ACID)/NATURAL RUBBER; MORPHOLOGICAL PROPERTIES; NATURAL-RUBBER; RHEOLOGICAL PROPERTIES; MECHANICAL-PROPERTIES; POLYLACTIDE; COPOLYMERS; PROGRESS;

D O I：

10.1002/ceat.202400048

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Poly(lactic acid) (PLA) is a biodegradable polymer with limited application because of its intrinsic brittleness, low toughness, and low elongation at break. Melt blends were prepared by mixing a natural rubber (NR, poly(1,4-cis-isoprene) in the form of liquid NR (LNR), liquid-epoxidized NR (LENR), and polypropylene (PP) in the PLA matrix. Four blend systems were designed and prepared, i.e., PLA-PP, PLA-PP-LNR, and PLA-LNR or PLA-LENR. The composition of PP in the blend was fixed at 10 % PLAPP (90/10). Results showed that PLA-PP mixed with LNR improved impact and elongation at break. The binary blend of PLA-LNR (90/10) significantly enhanced impact strength and elongation at break properties. In contrast, the binary blends of PLA-LENR (90/10) showed a lower value of elongation at break (9.5 % vs. 37.3%) and impact strength (4.56 kJ m(-2) vs. 6.44 kJ m(-2)). The melting temperature (T-m) and the glass transition temperature (T-g) were measured by differential scanning calorimetry, which recorded slight changes in the glass temperatures and melting temperatures. Scanning electron microscopy images of the tensile fracture of the PLA-LNR (90/10) blend showed the presence of large fibrils associated with the ductile failure related to neat PLA. Finally, the fracture toughness (K-IC) of PLA-LNR (90/10) showed an increase of 39 % over neat PLA (2.94 MPa.m(1/2) vs. 4.08 MPa.m(1/2)).

引用

页数：10