Article
Polymer Science
Lidong Feng, Xinchao Bian, Gao Li, Xuesi Chen
Summary: By investigating the thermal properties, morphology, and thermal stability of PLLA/PDLA blends, a new stereoamorphous mesophase (sam-PLA) structure was discovered, and the relationship between different phases in the PLLA/PDLA blends was explored.
Article
Polymer Science
Mateus Garcia Rodolfo, Lidiane Cristina Costa, Juliano Marini
Summary: This study evaluated the use of thermoplastic polyurethane (TPU) as a toughening agent for poly(lactic acid) (PLA). The results showed that TPU significantly improved the impact resistance of PLA and changed the elasticity and viscosity of the blend, indicating great potential as a toughening agent for PLA.
JOURNAL OF POLYMER ENGINEERING
(2022)
Article
Polymer Science
Wasana Nonkrathok, Tatiya Trongsatitkul, Nitinat Suppakarn
Summary: In this study, the shape memory properties of poly(lactic acid) (PLA)/poly(ethylene glycol) (PEG) blends were improved by adding maleic anhydride-grafted poly(lactic acid) (PLA-g-MA) as a compatibilizer. The PLA-g-MA improved interfacial adhesion between phases and promoted chain entanglement, leading to enhanced mechanical properties and shape fixity performance. The compatibilized blend containing 2 wt% PLA-g-MA exhibited the best shape fixity and recovery performance.
Article
Biochemistry & Molecular Biology
Kun Chen, Cheng Zhou, Lan Yao, Mengfan Jing, Chuntai Liu, Changyu Shen, Yaming Wang
Summary: Poly(lactic acid) (PLA) based ternary blends were prepared and the phase structures and mechanical properties were investigated. The PLA/PCL/EMA-GMA (80/5/15) blend exhibited the best elongation at break and impact toughness among all compositions, and showed excellent stiffness-toughness balance. The formation of core-shell structures and interfacial adhesion contributed to the toughening mechanism in the ternary blends. This study provides guidance for the preparation and design of partially renewable supertough materials based on PLA that can compete with conventional petro-derived plastics.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biochemistry & Molecular Biology
Shiling Jia, Ling Zhao, Xiangyu Wang, Yunjing Chen, Hongwei Pan, Lijing Han, Huiliang Zhang, Lisong Dong, Huixuan Zhang
Summary: PLA blends with different toughening agents were prepared, and the addition of GEBMA greatly improved its toughness at low temperature, showing reinforcement and super ductility. The main factors affecting the toughness of the blends were Tg and interfacial bonding.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Chemistry, Multidisciplinary
Han-Seung Ko, Sangwoon Lee, Doyoung Lee, Jae Young Jho
Summary: By introducing PGA fibers and HA into PLA composites and modifying HA, the tensile and flexural strength of PLA/HA-g-PLA composites were improved, along with enhancing the interfacial adhesion between HA and the PLA matrix.
Article
Polymer Science
Adrian Korycki, Christian Garnier, Amandine Abadie, Valerie Nassiet, Charles Tarek Sultan, France Chabert
Summary: The study elaborated PEEK/PES blends with partial miscibility by melt mixing with phenolphthalein, which was confirmed by DSC and DMTA analysis. Phenolphthalein acted as a compatibilizer and plasticizer for the blends, resulting in a softened PEEK phase and improved interfacial adhesion with PES. Additionally, the storage modulus in the glassy region of the blends remained similar to pure PEEK due to the aromatic moieties in phenolphthalein.
Article
Chemistry, Multidisciplinary
Rong Wang, Xiaojie Sun, Lanlan Chen, Wenbin Liang
Summary: In this study, biodegradable blends of PGA and PBAT with in situ compatibilization using MDI were prepared. The addition of PBAT was found to increase the complex viscosity and storage modulus of the blends, leading to improved compatibility and impact strength. The morphology of the dispersed phase evolved from spherical structure to in situ microfiber, enhancing interfacial adhesion and improving toughness.
Article
Chemistry, Physical
Nedjma Tazibt, Mustapha Kaci, Nadjet Dehouche, Mohamed Ragoubi, Leonard Ionut Atanase
Summary: The effect of hydroxyapatite (HAp) synthesized by the chemical precipitation process on the morphology and properties of poly(lactic acid) (PLA)-based composites was investigated. It was found that the addition of 5 wt% HAp led to a slight improvement in the thermal stability and tensile properties of the composite material compared to neat PLA and other composite samples. The study also highlighted the potential use of HAp as a reinforcement in PLA composite materials.
Article
Engineering, Environmental
Davide Perin, Daniele Rigotti, Giulia Fredi, George Z. Papageorgiou, Dimitrios N. Bikiaris, Andrea Dorigato
Summary: This work investigates the microstructural and thermo-mechanical properties of fibers made from poly(lactic acid) (PLA)/poly(alkylene furanoate)s (PAFs) blends for textile applications. The addition of poly(dodecylene furanoate) (P12F) enhances the mechanical properties of PLA fibers, indicating immiscibility between PAFs and PLA in the blends.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Polymer Science
Eduardo Ruiz-Silva, Mirleth Rodriguez-Ortega, Luis Carlos Rosales-Rivera, Francisco Javier Moscoso-Sanchez, Denis Rodrigue, Ruben Gonzalez-Nunez
Summary: Blends of PLA/LMDPE with different weight ratios were prepared using rotational molding and two mixing strategies, DB and MB. Thermal, morphological, and mechanical analyses showed that the blends' thermal stability, morphology, and mechanical properties were affected by the blending technique. DB generated larger particle sizes compared to MB, and blends with different PLA contents exhibited synergistic effects in tensile and flexural properties.
Article
Engineering, Environmental
Weishuo Chen, Channa Zhong, Shuangcheng Li, Die Wen, Dongdong Zhou, Jun Shao, Shuiliang Chen, Haoqing Hou, Sheng Xiang
Summary: The blends of poly(D-lactic acid) and poly(L-lactic acid) (PDLA/PLLA) exhibit higher crystallization rate and mechanical strength than individual PDLA or PLLA due to the formation of stereocomplex crystals (SC). SC serves as an effective nucleating agent for PLA homochiral crystals (HC). However, the morphology of SC in asymmetric blends and its effect on the crystallization behavior of HC remains unclear. In this study, PDLA/PLLA blends with different weight ratios were prepared using different methods to obtain SC with different morphologies. The results showed that SC morphology influenced the formation of HC, with fibrous and banded SC inhibiting HC formation, spherical SC enhancing HC formation, and network structure SC significantly accelerating the crystallization rate of HC.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Megha D. Deokar, Baijayantimala Garnaik, Swaminathan Sivaram
Summary: Well-defined six-arm star-branched bio-degradable block copolymers were prepared using controlled ring-opening polymerization and a sequential monomer addition method. The study found that the sequence of enchainment could be changed by reversing the order of monomer addition, resulting in different crystalline or amorphous blocks. However, disruption of the block structure was observed in one of the copolymers due to competing transesterification reactions. Differential scanning calorimetry studies showed interesting phase morphologies in these sequence-controlled block copolymers. Blending these copolymers with a commercially sourced polymer led to improved tensile toughness in the blend.
Article
Biochemistry & Molecular Biology
Guoqiang Wang, Li Zhang, Xiang Chi
Summary: Due to its superior tensile strength, biodegradability, and biocompatibility, poly(lactic acid) (PLA) has become a growth-oriented biodegradable material. However, its poor ductility has limited its practical applications. To address this, ductile blends were prepared by melt-blending poly(butylene succinate-co-butylene 2,5-thiophenedicarboxylate) (PBSTF25) with PLA, which significantly improved the ductility of PLA. The addition of PBSTF25 promoted cold crystallization and stretch-induced crystallization of PLA, and the resulting blends exhibited improved ductility and processing properties. The toughening effect of PBSTF25 was found to be better than that of poly(butylene succinate).
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Environmental
Wei Keat Ng, Wen Shyang Chow, Hanafi Ismail
Summary: This study evaluates the effects of PEOx on the thermal properties, wettability, and optical properties of PLA, demonstrating that the addition of PEOx improves PLA's transparency and induces the formation of beta-crystals. The higher the loading of PEOx, the higher the intensity of beta-crystals formation, making the PLA/PEOx blends suitable for packaging applications.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
