Article
Polymer Science
Feng Zhang, Zhiguo Jiang, Zhaobin Qiu
Summary: In this study, biobased poly(ethylene succinate)-b-poly(triethylene terephthalate) (PES-b-PTEGT) multiblock copolyesters with low weight ratios of PTEGT segment were successfully synthesized using a chain extension reaction. The thermal, crystallization, and mechanical properties of PES-b-PTEGT were systematically investigated and compared with those of PES prepared via the chain extension method. PES-b-PTEGT exhibited high melting temperature, enhanced crystallizability, and improved mechanical property.
Article
Polymer Science
Jingnan Li, Zhiguo Jiang, Zhaobin Qiu
Summary: This study investigated the isothermal melt crystallization kinetics of fully biodegradable poly(ethylene succinate) (PES)/cellulose nanocrystals (CNC) composites. The results showed that low loadings of CNC significantly enhanced the crystallization rate and nucleation density of PES. When the CNC loading increased from 0.25 to 1 wt%, the crystallization rate and nucleation efficiency first increased, reached a maximum, and then decreased, demonstrating a CNC loading dependence attributed to the dispersion states of CNC in the composites.
Article
Materials Science, Characterization & Testing
Ziyu Wei, Shanshan Zhou, Yuhong Xie, Yongyan Sun, Huimin Ma, Zhanghua Xie, Zhe Zhu, Jinjun Yang
Summary: Incorporating TMC306 as a nucleator into PES enhances the crystallization behavior of PES at lower weight fractions, but leads to a decline in crystallization at higher weight fractions. Interaction between TMC306 and PES through hydrogen bonding is indicated by IR results.
Article
Polymer Science
Chunfeng Jia, Shanshan Zhou, Zhanghua Xie, Lukai Wang, Yubin Yang, Xiaoyu Sun, Yuhong Xie, Jinjun Yang
Summary: The P- and Zn-containing organic/inorganic hybrid layered metal phosphonate (PPZn) acted as a biocompatible nucleator in biodegradable poly(ethylene succinate) (PES) polyester, significantly enhancing its crystallization rate and thermal stability. The nucleation was mainly attributed to good crystal lattice matching between PES and PPZn, which facilitated uniform dispersion.
POLYMER INTERNATIONAL
(2021)
Article
Environmental Sciences
Subong Park, Bongseong Bae, Bong-jin Cha, Yun Jin Kim, Hyo Won Kwak
Summary: Nylon fishing nets cause damage to marine environments when lost, so a biodegradable poly(butylene succinate) (PBS) resin was developed. By adding adipic acid and ethylene glycol to PBS, poly(butylene adipate-co-butylene succinate-co-ethylene adipate-co-ethylene succinate) (PBEAS) resin with excellent properties and low melting point was synthesized. This resin can be used for gill nets, expanding the application of biodegradable fishing gear.
MARINE POLLUTION BULLETIN
(2023)
Article
Polymer Science
Zhijun Wang, Jinggang Wang, Yongyan Pang, Jin Zhu, Wenge Zheng
Summary: The present work studied the dependence of the foaming temperature window of PEFT copolyesters on FDCA content and saturation pressure. Increasing FDCA content led to a narrower foaming temperature window while increasing saturation pressure affected the foaming temperature differently. These findings are important for foaming and cell structure control in various copolymers.
Article
Polymer Science
Shanshan Zhou, Ziyu Wei, Yongyan Sun, Zhe Zhu, Zhanghua Xie, Huimin Ma, Jing Yin, Junsheng Wang, Jinjun Yang
Summary: The addition of EBH significantly enhances the crystallization rate and thermal stability of PES, with EBH showing good nucleating effects in PES. The hydrogen bond interaction between EBH and PES promotes rearrangement of carbonyl groups during crystallization process.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Polymer Science
Kangjing Zhang, Zhiguo Jiang, Zhaobin Qiu
Summary: The research systematically investigated the thermal, crystallization, and mechanical properties of three novel PES-based copolyesters with different lengths of side groups. The presence of side groups did not alter the crystal structure but slightly decreased crystallinity. As the length of side groups increased, the melting point temperatures decreased and the elongation at break increased. The dynamic mechanical analysis showed a gradual decrease in storage modulus and tan 5 with increasing side group length, indicating significant impact on the properties of PES-based copolymers.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Polymer Science
Chunyan Liu
Summary: By incorporating ethylene oxalate groups into the molecular chain of poly(ethylene succinate), the crystallization rate and physical properties of PES can be enhanced, providing a new strategy for improving PES crystallization rate.
Article
Polymer Science
Siyu Pan, Zhiguo Jiang, Zhaobin Qiu
Summary: This research investigated the effect of cellulose nanocrystals (CNC) on the crystallization behavior, crystalline morphology, and crystal structure of Poly(ethylene succinate-co-1,2-propylene succinate) (PEPS). The results showed that CNC enhanced the crystallization rate of PEPS and acted as a heterogeneous nucleating agent. The induction of CNC played an important role in the nucleation mechanism of PEPS.
Article
Polymer Science
Xiaodong Yang, Bin Yu, Hui Sun, Nan Wang, Peng Liu, Jiangli Feng, Xiaogang Cui
Summary: The study investigated the crystallization kinetics, morphology, and structure of ECTFE using DSC, POM, and XRD, revealing various patterns of crystallization processes and changes in crystalline degree.
Article
Thermodynamics
Xiao-Ming Zhou, Xiao-Ya Wang, Tianci Wu
Summary: In this study, graphene oxide (GO) was successfully prepared and dispersed in PBNPGS during the experiment, accelerating the crystallization process. Non-isothermal crystallization behavior of GO-PBNPGS was influenced by GO content and cooling rate, and GO served as an effective nucleating agent when 0.10% GO was added.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Polymer Science
Mareen Schaefer, Shichen Yuan, Albrecht Petzold, Ricardo A. Perez-Camargo, Alejandro J. Mueller, Thomas Thurn-Albrecht, Kay Saalwaechter, Klaus Schmidt-Rohr
Summary: The biodegradation of isodimorphic random butanediol-succinate/adipate copolymers can be influenced by changes in their semicrystalline morphology. Proton time-domain NMR and wide-angle X-ray scattering were used to characterize the copolymers and analyze the inclusion of minority comonomers in the crystalline structure. The study found that in PBA-rich copolymers, BS units are incorporated into the BA crystalline structure, while in PBS-rich crystals, BA units are excluded from the bulk crystal but accumulate at the crystallite surface.
Article
Engineering, Environmental
Jingnan Li, Zhaobin Qiu
Summary: The study revealed that cellulose nanocrystals can effectively enhance the melt crystallization rate of poly(ethylene succinate), with a loading-dependent effect. At a loading of 0.5wt% cellulose nanocrystals, the composite exhibited the strongest crystallization characteristics.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Polymer Science
Siyu Pan, Zhaobin Qiu
Summary: A successfully prepared low content cellulose nanocrystals (CNC) reinforced biodegradable poly(hexamethylene succinate) (PHS) based composite displayed excellent thermal stability and crystallization rate, as well as enhanced mechanical properties. This method provides a beneficial approach to promote the wider application of biodegradable polymers.