Article
Polymer Science
Lifei Feng, Ran Li, Han Yang, Shanwei Chen, Wenbin Yang
Summary: A method of reinforcing and toughening unsaturated polyester resin (UPR) with a hyperbranched polyester (HBP-1) was reported. The results showed that HBP-1 enhanced the thermostability and mechanical properties of UPR.
Review
Chemistry, Multidisciplinary
Wenli An, Xiong-Lei Wang, Xuehui Liu, Gang Wu, Shimei Xu, Yu-Zhong Wang
Summary: Polymer materials are driving rapid societal development, but improper disposal leads to serious pollution and resource waste. Chemical recovery shows promise in converting waste polymers into useful chemicals or materials, with a focus on addressing the challenges of recovering thermosetting resins such as unsaturated polyester resins. New strategies are needed to enhance the selective breaking of ester bonds and improve the reutilization of degradation products for a more sustainable future.
Article
Construction & Building Technology
Hongliang Zhang, Qihan Zhong, Tong Liu, Wenjiang Lv
Summary: This study proposed a waterborne unsaturated polyester resin (WUPR) pothole binder to address the drawbacks of traditional emulsified asphalt binders. Through tests and comparisons, it was found that the WUPR binder had similar mechanical properties to waterborne epoxy resin (WER) binder, but better low-temperature performance and lower cost.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Xiaoqing Wang, Biao Ma, Wenbin Su, Junwei Tao, Heting Shi, Wei Si
Summary: Currently, cold patching materials (CPMs) have become a preferred choice for pothole repair on asphalt pavements in cold and wet weather. However, the survival time of conventional asphalt-based CPMs is not satisfactory, and they can cause water and air pollution. This study developed a pollution-free, economical, and high-performance CPM using a low viscosity, high toughness, and low temperature curing epoxy resin (ER) binder and unsaturated polyester. The results showed that the epoxy/unsaturated polyester mixture (EUPM) had excellent performance and repair effect, proving its feasibility and advantages in asphalt pavement maintenance.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Polymer Science
Andrey Shcherbakov, Anton Mostovoy, Amirbek Bekeshev, Igor Burmistrov, Sergey Arzamastsev, Marina Lopukhova
Summary: The study explored the use of microwave radiation in different stages of producing carbon nanotube-modified unsaturated polyester composites. Experimental results determined the optimal content of multi-walled carbon nanotubes in the system, which had the greatest impact on composite strength. The effects of microwave treatment on the properties of polyester composites, including oligomers, polymerized composites, and MWCNTs prior to their addition into oligomers, were investigated. The study also considered the processes of structure formation, composite structure, the impact of microwave radiation on MWCNTs, and the thermal stability of the resulting composites.
Article
Polymer Science
Nasmi Herlina Sari, Suteja Suteja, Ahmad Fudholi, Ahmad Zamzuriadi, Emmy Dyah Sulistyowati, Pandri Pandiatmi, Sinarep Sinarep, Ahmad Zainuri
Summary: The research focuses on characterizing the mechanical properties and morphology of polyester/coconut shell powder composites filled with corn husk fibre (CHF). Results show that increasing CHF content leads to higher flexural strength but lower tensile strength of the composite. The enhancement of the interfacial bonding between CHF-CSP-polyester and the reduction of fiber pull-outs contribute to the improved properties.
Article
Materials Science, Multidisciplinary
Giuliana Rizzo, Lorena Saitta, Sandro Dattilo, Claudio Tosto, Eugenio Pergolizzi, Alojz Ivankovic, Gianluca Cicala
Summary: In this study, an unsaturated polyester vitrimer was synthesized and characterized using a transesterification catalyst. This approach solved the reprocessability, self-healing, and recyclability issues of unsaturated polyester thermosets and preserved their mechanical properties, glass transition, and chemical stability.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Construction & Building Technology
Khairunnisa Zulkifly, Heah Cheng-Yong, Liew Yun-Ming, Mohd Mustafa Al Bakri Abdullah, Ong Shee-Ween, Mohd Suhaimi Bin Khalid
Summary: This study investigates the influence of NaOH concentration, solid-to-liquid ratio, and sodium silicate-to-sodium hydroxide ratio on the compressive strength development of fly ash-metakaolin blend geopolymers. The addition of aluminum phosphate as a source of aluminum was found to significantly enhance the physical and mechanical properties of the blend geopolymer.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Polymer Science
Qiufeng Mo, Yifeng Huang, Lanyu Ma, Wenqin Lai, Yihua Zheng, Yanming Li, Mengxue Xu, Zhimin Huang
Summary: Microwave curing technology can effectively accelerate the curing rate of UPR composite materials containing fillers, but excessive microwave power may lead to internal defects and reduced strength.
Article
Materials Science, Multidisciplinary
Ong Shee-Ween, Heah Cheng-Yong, Liew Yun-Ming, Mohd Mustafa Al Bakri Abdullah, Ho Li Ngee, Lynette Wei Ling Chan, Ooi Wan-En, Nur Ain Jaya, Ng Yong-Sing
Summary: This research focuses on utilizing low alkali activator content and cold pressing technique to form fly ash-based geopolymers under room temperature conditions. The results demonstrate that specific parameters can lead to optimized mechanical properties in the geopolymers.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Polymer Science
Adrian Borquez-Mendivil, Abel Hurtado-Macias, Jesus Eduardo Leal-Perez, Joaquin Flores-Valenzuela, Ramon Alvaro Vargas-Ortiz, Francisca Guadalupe Cabrera-Covarrubias, Jorge Luis Almaral-Sanchez
Summary: Hybrid coatings of SiO2 and recycled unsaturated polyester resin (R-UPR) were prepared by the sol-gel process on glass substrates. The results showed that SiO2 enhanced the mechanical and thermal properties of the R-UPR, and the coatings exhibited excellent adhesion to the substrate with a smooth surface.
Article
Construction & Building Technology
Quanming Ren, Xiaozhao Li, Yukun Ji, Xiaolei Ding, Qiang Sun, Peng Zhao, Fuqing Li, Veerle Vandeginste
Summary: This study explores the effect of phenolic resin on the thermal insulation performance of geopolymer by preparing fly ash geopolymer samples using phenolic resin. The results show that phenolic resin can improve the thermal insulation effect of geopolymer and reduce thermal conductivity by narrowing the throat in the pore and limiting thermal convection. This study provides a new method to improve thermal insulation performance of geopolymers.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Polymer Science
Zhandos Tauanov, Olzhas Zakiruly, Zhuldyz Baimenova, Alzhan Baimenov, Nuraly S. Akimbekov, Dmitriy Berillo
Summary: This study focuses on the synthesis of polymer composites with antimicrobial properties for sanitary applications. The results show that the composite has a non-porous structure and effectively inhibits the growth of bacteria.
Article
Polymer Science
Shuang-Lin Hu, Ying-Ming Li, Wen-Juan Hu, Jose Hobson, De-Yi Wang
Summary: A highly efficient flame retardant, MA-DOPO, was designed through a nucleophilic substitution reaction and showed promising improvement in tensile strength and flame retardancy of UPR composites. The flame-retarding mechanism involves the release of inert gas in the gas phase and catalytic carbonation in the condensed phase.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Chemistry, Physical
Jinjian Zhu, Xiaojun Wang, Minzhuang Chen
Summary: Dual-initiation is a new approach in the curing of unsaturated polyester resin and the manufacture of low-density unsaturated polyester resin composite materials. By using different combinations of initiators, dual-initiators can release more active free radicals, accelerating the curing process and improving the cross-linking of the resin. This results in enhanced specific compressive strength of the composite materials.
