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  1. No Access

    Article

    Preparation, Evaluation and Field Application of Thermally Induced Crosslinked Polymer Gel Leakage Plugging Agent

    Addressing the complex issue of lost circulation in drilling operations is crucial as it increases nonproductive time and costs. Conventional gel plugging materials often exhibit low temperature resistance, po...

    **dong Chen, Hengbin Qiu… in Journal of Polymers and the Environment (2024)

  2. Article

    Open Access

    Effect of swab and surge pressure on the time-dependent wellbore natural fracture development

    Drilling engineers continue to grapple with the persistent challenge of maintaining wellbore stability. Throughout the drilling process, the wellbore pressure experiences fluctuations induced by various factor...

    Arnaud Regis Kamgue Lenwoue, Zhonghui Li… in Geomechanics and Geophysics for Geo-Energy… (2024)

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  3. No Access

    Article

    Synthesis and Properties of Degradable Polyesters Based on a Lignin Derivative, 4-Hydroxybenzoic Acid

    A novel diester monomer synthesized from 4-hydroxybenzoic acid, a compound which can be derived from lignin, was used to obtain aliphatic-aromatic copolyesters (P1–P4) by melt polymerization with 1,4-cyclohexa...

    Pisheng Pan, Zhengzai Cheng, Jiaqi Li… in Journal of Polymers and the Environment (2024)

  4. No Access

    Article

    Preparation and evaluation of an ultra-high temperature resistant zwitterionic polymer viscosity reducer

    In this study, a new zwitterionic polymer viscosity reducer (HP-THIN) was designed to address the issue of viscosity increases in high-temperature and high-density water-based drilling fluids. HP-THIN is speci...

    Hu Deng, Huaizhi Tao, Jiawei Ai, **dong Chen, Binqiang **e… in Journal of Polymer Research (2024)

  5. No Access

    Article

    Bio-based Copolyesters from p-Hydroxybenzaldehyde: Synthesis, Characterization and Thermo-Mechanical Properties

    Petroleum-based polyesters are widely used in daily life. However, their reliance on petroleum resources and non-biodegradability have raised concerns. Due to the advantages of being renewable, degradable, and...

    Huan Wang, Zhengzai Cheng, Lesly Dasilva Wandji Djouonkep, Chupeng Lan, Linfeng Wang… in JOM (2023)

  6. No Access

    Article

    Synthesis and Properties of Biodegradable Polyesters Based on Orcinol

    Using orcinol (3,5-dihydroxytoluene) as raw material, hydroxyethylation was carried out to prepare the diester monomer M, dimethyl 2,2'-((5-methyl-1,3-phenylene)bis(oxy))diacetate, which was polymerized with a...

    Linfeng Wang, Zhengzai Cheng… in Journal of Polymers and the Environment (2023)

  7. No Access

    Article

    Synthesis and Properties of Bio-based Copolyesters Based on Phydroxyphenylpropionic Acid

    Dimethyl 3,3′-((ethane-1,2-diylbis(oxy))bis(4,1-phenylene))dipropionate (monomer M) was successfully synthesized from methyl 3-(4-hydroxyphenyl)propanoate and 1,2-dibromoethane by Williamson etherification, an...

    Shuanpu Cai, Zhengzai Cheng… in Journal of Polymers and the Environment (2023)

  8. No Access

    Article

    Synthesis and Characterization of Novel Hydrolytically Degradable Polyesters

    Six novel hydrolytically degradable polyesters were synthesized from thiodipropionic acid (TDPA) and five diols by melt polycondensation, and characterized by FT-IR, 1H NMR, gel permeation chromatography, differe...

    **n Sun 孙欣, Zhengzai Cheng 程**载… in Journal of Wuhan University of Technology-… (2023)

  9. No Access

    Article

    Synergistic Effect and Structure–Property of Bio-based 1,6-Hexanediol on Thermal, Mechanical and Degradation Properties of Biopolymers

    The rising cost of petrochemicals owing to the rapid depletion of fossil resources has gradually divert research interest to novel chemicals derived from biomass feedstock. In this study we explored the synthe...

    William Mawuko Kodzo Siegu… in Journal of Polymers and the Environment (2023)

  10. No Access

    Article

    Degradable Polyesters based on Oxygenated Fatty Acid Monomer

    A series of degradable polyesters was synthesized via melt polymerization of 3,6-dioxaoctane-1,8-dioic acid and five different diols, catalyzed by antimony trioxide (Sb2O3). The polymers were characterized by FT-...

    Zhengzai Cheng 程**载, Yi Li… in Journal of Wuhan University of Technology-… (2022)

  11. No Access

    Article

    A novel crosslinked poly(AMPS-co-VA-co-DVB) viscosifier for high temperature water-based drilling muds

    Deep and ultra-deep well exploration is rapidly becoming an important means to meet the enormous world oil and gas demands. Currently, many rheology builders exhibit poor salt tolerance and display low thermal...

    Haiyang Zhao, Yunpeng Geng, Lesly Dasilva Wandji Djouonkep… in Journal of Polymer Research (2022)

  12. No Access

    Article

    Synthesis of Biobased Soft-Packaging Polyesters from 2,5 Thiophenedicarboxylic Acid

    Demand for light-packaging materials for food and beverages is on the rise globally, especially in develo** countries where several depend on packaged food. Furthermore, poly(ethylene terephthalate) (PET) a...

    William Mawuko Kodzo Siegu… in Journal of Polymers and the Environment (2022)