Article
Polymer Science
D. Perin, A. Dorigato, A. Pegoretti
Summary: One of the main limitations of high-performance composite materials is failure due to fatigue crack propagation. Traditional repair methods can be costly and time-consuming, so research in the field of self-healing composites has increased. This study focuses on producing a polyamide 6 (PA6) matrix with self-healing properties by melt compounding cyclic olefinic copolymer (COC) with PA6. The immiscibility and lack of interfacial adhesion between the constituents were observed through scanning electron microscope micrographs. The addition of 30 wt% of COC resulted in a slight decrease in fracture toughness, but led to a healing efficiency of 11% in quasi-static mode and 35% in impact mode.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Laszlo Lendvai
Summary: A novel melt compounding method was used to produce polypropylene (PP) based blends toughened with up to 20 wt% natural rubber (NR). This water-assisted technique improved the toughness efficiency of NR particles within the PP matrix by reducing their size, especially when the viscosity difference between PP and NR was higher. Additionally, the water-assisted technique enhanced deformability with similar strength and stiffness compared to common melt mixing.
POLYMER INTERNATIONAL
(2021)
Article
Polymer Science
Andrey Burkov, Alexander Kraev, Maxim Grishin, Roman Vesnin, Sergey Fomin, Alexey Iordanskii
Summary: The study successfully enhanced the compatibility of the PLA and NR blends using epoxidized soybean oil as a natural plasticizer and compatibilizer, resulting in samples with improved phase compatibility and enhanced thermal stability of the novel material.
Article
Polymer Science
Nur Fazreen Alias, Hanafi Ismail, Ku Marsilla Ku Ishak
Summary: Biocomposites are environmentally friendly materials with less carbon footprint, but face complexity in compatibility issues. Addition of specific compatibilizers can improve mechanical properties and interfacial adhesion, leading to reduced water absorption.
IRANIAN POLYMER JOURNAL
(2021)
Article
Chemistry, Physical
Zhejing Cai, Drahomir Cadek, Michaela Jindrova, Alena Kaderabkova, Antonin Kuta
Summary: This study blended the sustainable material thermoplastic potato starch (TPS) with modified natural rubber-epoxidized natural rubber (ENR), and improved their mechanical properties through vulcanization. The results showed that vulcanization significantly enhanced the mechanical properties of the ENR/TPS blends, with the CBS-CV vulcanization system performing the best. The material can be used for eco-friendly packaging and agricultural films, and the investigation provides insights for industries and research.
Article
Agricultural Engineering
Sa-Ad Riyajan
Summary: Green polymer, made from grafted natural rubber, exhibits high thermal stability, low moisture absorption, and sustained release of curcumin.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Materials Science, Characterization & Testing
Juliana M. Farias da Silva, Bluma G. Soares
Summary: Epoxidized cardanol-based prepolymer (ECP) from cashew nut shell liquid (CNSL) was successfully utilized as a biobased compatibilizer/chain extender for PLA/PBAT blends, improving mechanical, dynamic-mechanical and thermal properties, and offering new possibilities for cost-effective biobased and/or biodegradable materials for food packaging applications.
Article
Agricultural Engineering
Si-Yao Wang, Cheng Jiang, Hai-Hang Xie, Jian-Bing Zeng, Yi-Dong Li
Summary: The study investigates the effectiveness of using epoxidized natural rubber (ENR) to improve the compatibility of polylactide (PLA) and poly(butylene adipate-co-terephthalate) (PBAT) blend. The results show that blending PLA with ENR first, followed by blending with PBAT, leads to improved compatibility and increased toughness of the blends. The mechanism for the toughening effect is interfacial bonding cavitation-initiated matrix plastic deformation.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Engineering, Chemical
Weizhen Zhang, Zhilong Yang, Yuan Li, Qi Zhang, Shijun Zhang, Liqun Zhang
Summary: Epoxidized silicone rubber with 5% epoxy content (ESR-5) was added to improve the compatibility of PA6/PDMS composite. Various characterization techniques showed that the ESR-5 reacted with PA6, resulting in improved interfacial morphology and decreased rubber particle size. The addition of ESR-5 at a content of 50% in the rubber phase led to a significant increase in impact strength of the composite at -60 degrees C.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Physical
Xianjie Ren, Cindy S. Barrera, Janice L. Tardiff, Katrina Cornish
Summary: In this research, chemically modified guayule natural rubber (EGNR)/guayule natural rubber (GNR) blends were used to make carbon black filled composites, resulting in higher oil resistance and wet traction compared to GNR composites. Although tensile strength and elongation at break were reduced, this study contributes to the development of new NR products with similar properties to synthetic rubbers, increasing the sustainability of the rubber industry.
Article
Biochemistry & Molecular Biology
Anna Masek, Stefan Cichosz, Malgorzata Piotrowska
Summary: The study successfully prepared sustainable and degradable elastic PLA blends with high tensile strength and elongation, improved by the addition of flax fiber and montmorillonite, showing potential to become competitive and eco-friendly alternatives.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Engineering, Multidisciplinary
Sammy He, Declan Carolan, Alexander Fergusson, Ambrose C. Taylor
Summary: In this study, the fracture toughness of syntactic foams was improved by modifying the epoxy polymer matrix. However, the increase in toughness was much smaller compared to the modification of bulk epoxy polymers. This is attributed to the small interstitial regions between the hollow glass microspheres in the syntactic foams, which restrict the size of the plastic zone.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Polymer Science
Lan Guo, Yunsheng Xu, Xianming Zhang, Guo-Hua Hu
Summary: Nanoparticles are used to compatibilize immiscible polymer blends. Silica nanoparticles (SiO2) were used in this study to compatibilize polyamide 6 (PA6)/polycarbonate (PC) blends. The localization of SiO2 at the interfaces between PA6 and PC was achieved through grafting a methacrylic monomer onto SiO2 and copolymerizing it with styrene (St) and 3-isopropenyl-alpha,alpha'-dimethylbenzyl isocyanate (TMI). The presence of SiO2-PST significantly decreased the PC domain diameter and improved the mechanical properties of the PA6/PC blend.
Article
Materials Science, Composites
Xianyun Gong, Yuyan Liu, Mina Huang, Qingliang Dong, Nithesh Naik, Zhanhu Guo
Summary: Poly(dopamine) (PDA) is coated on the surface of aramid fibers (AFs) via the amino activity of dopamine using a dip coating method, contributing to improved surface roughness and activity.
COMPOSITES COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Davide Perin, Giada Odorizzi, Andrea Dorigato, Alessandro Pegoretti
Summary: High-performance composites often suffer from fatigue crack propagation, and traditional repair methods are inefficient. Therefore, the development of composites with self-healing capabilities has gained significant attention in the past decade. This study focuses on developing a PA6 matrix with self-healing properties by incorporating PCL as a healing agent. The results demonstrate that the repaired samples show improved healing efficiency under impact conditions.
APPLIED SCIENCES-BASEL
(2022)
