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
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
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
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
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, 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
Jian Wang, Weiping Chen, Libin Bai, Yuelan Tian, Xinwu Ba
Summary: Poly(ethylene succinate) (PES) with high chain regularity was synthesized by adding oxalic acid in the melt poly-condensation system. The addition of oxalic acid resulted in a decrease in the molar ratios of diethylene glycol succinate (DEGS) units in the polymer chains. Oxalic acid underwent esterification and decarboxylation, producing ethylene glycol monoformate and formate end-capped PES oligomers. The formate endcapping suppressed side reactions and led to a faster transesterification rate, higher molecular weights, higher melting temperatures, increased crystallization rates, and improved mechanical properties.
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
Zhiyi Sun, Mingkun Chen, Gang Xie, Zhiguo Jiang, Zhaobin Qiu
Summary: This study successfully synthesized a series of novel poly(ethylene succinate-co-2,3-butylene succinate) (2,3-PEBS) copolyesters with low contents of 2,3-butylene succinate unit (2,3-BS) via a two-stage melt polycondensation. The results revealed that the introduction of a small amount of two adjacent side methyl groups brought an obvious variation in the thermal and mechanical properties of PES. However, 2,3-PEBS displayed the same crystallization mechanism and crystal structure as PES.
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
Xiangning Wen, Yunlan Su, Shaofan Li, Weilong Ju, Dujin Wang
Summary: The study demonstrated that PEG-g-SiO2 can significantly increase the crystallinity and crystallization temperature of PEO matrix, affecting the crystalline morphology and rate of PEO. The good dispersion of PEG-g-SiO2 in the PEO matrix contributes to enhancing the primary nucleation rate.
Article
Engineering, Chemical
Jiho Seo, Xiaoshi Zhang, Richard P. Schaake, Alicyn M. Rhoades, Ralph H. Colby
Summary: The study introduces the dual Nakamura model to capture primary and secondary crystallization kinetics of poly(ether ether ketone) (PEEK). Monitoring non-isothermal crystallization kinetics of PEEK at five constant cooling rates, the dual Nakamura model successfully describes the final stage of crystallization by reducing the crystal growth dimension.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Polymer Science
Hui Shen, Ruru Wan, Shangyun Chen, Tao Tang, Xiaoli Sun, Huihui Li, Shouke Yan
Summary: Bent and faceted single crystals of PVDF were prepared by isothermal crystallization in its blends with PBS. The PVDF crystals can reach hundreds of microns with bent branches and are composed of bent basal lamellae with overgrowths. The electron diffraction patterns exhibit a single crystal feature but change constantly with b-axis, which may be attributed to the unbalanced growth of four (110) faces and an inhomogeneous surface order or arrangement.
Article
Polymer Science
Pratick Samanta, V Thangapandian, Rajiv Srivastava, Bhanu Nandan
Summary: This study investigates the non-isothermal crystallization kinetics of confined polymer in electrospun nanofibers. The results indicate that the Avarmi and Jeziorny models successfully predict the nucleation nature and growth behavior of PEO chains, while the Ozawa model is not suitable for the confined system. The Mo's method effectively describes the non-isothermal crystallization behavior of PEO in confined domains. The Kissinger and Takhor methods demonstrate that the activation energy for crystallization of PEO chains increases with reduction of PEO weight fraction in the nanofibers.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Optics
Minghui Huang, Ling Wang, Kangyi Zhang, Miao Yan, Yuqin Li, Zhen Zhu, Jinjun Yang
Article
Chemistry, Physical
Wei Li, Qiongying Cen, Wenjiang Li, Zihan Zhao, Wenlong Yang, Yuqian Li, Minfang Chen, Guang Yang, Jinjun Yang
JOURNAL OF MATERIOMICS
(2020)
Article
Biochemistry & Molecular Biology
Huimin Ma, Ziyu Wei, Shanshan Zhou, Haibo Zhu, Jingjing Tang, Jing Yin, Junjie Yue, Jinjun Yang
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2020)
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
Engineering, Environmental
Shanshan Zhou, Yongyan Sun, Huimin Ma, Chunfeng Jia, Xiaoyu Sun, Yubin Yang, Juan Liu, Jinjun Yang
Summary: The study found that TMC300 as a nucleating agent significantly improved the crystallizability of PES during cooling process, and interacted with PES through hydrogen bonds. This interaction played a key role in enhancing the nucleation effect of TMC300 on PES.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Chemistry, Applied
Yubin Yang, Zhe Zhu, Zhanghua Xie, Fude Liu, Jing Yin, Xiaoyu Sun, Chunfeng Jia, Jinjun Yang
Summary: A novel bio-composite was fabricated using poly(ethylene adipate) (PEA) and naturally occurring uracil (URA), resulting in enhanced crystallizability and thermal degradation stability. The addition of URA acted as a nucleator (NA) and contributed to the flame retardance effect observed in the PEA/URA composite.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2021)
Article
Polymer Science
Shanshan Zhou, Yubin Yang, Zhe Zhu, Zhanghua Xie, Xaioyu Sun, Chunfeng Jia, Fude Liu, Junsheng Wang, Jinjun Yang
Summary: A novel flame retardant (POCODA) synthesized from POC and ODA was investigated for its effects on the thermal stability and combustion behavior of poly(L-lactic acid) (PLA) composites. The addition of POCODA/APP as a synergistic flame retardant showed improvements in the flame retardancy of PLA-based composites, with the optimal ratio achieving a V-0 rating. The proposed mechanism of flame retardance for the PLA/2%POCODA/10%APP composite was discussed based on SEM, TG-IR, and PY-GC/MS measurements.
Article
Materials Science, Composites
Xiaoyu Sun, Zhe Zhu, Zhanghua Xie, Juan Liu, Jing Yin, Yubin Yang, Chunfeng Jia, Fude Liu, Jinjun Yang
Summary: The self-organized bisamide-based derivative TMB-5 acted as a nucleating agent for inducing shishkebab structure in PBA. TMB-5 increased crystallization rate, decreased crystallization time, and exhibited a good nucleation effect on PBA. It also modulated polymorphism, shortened PBA phase transition, and enhanced thermal stability of PBA, clarifying mechanisms on crystal growth and controlled polymorphic structure and phase transition.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Ziyu Wei, Yu Yi, Zhen Luo, Xiaoyun Gong, Yuxing Jiang, Dayong Hou, Li Zhang, Zimo Liu, Mandi Wang, Jie Wang, Ruochen Guo, Jinjun Yang, Lei Wang, Hao Wang, Yuliang Zhao
Summary: Nanotechnology-based chemoimmunotherapy has shown great potential for cancer treatment, but uncontrolled transportation and synergistic responses remain challenges. In this study, a self-assembled selenopeptide nanoparticle is developed to enhance tumor chemoimmunotherapy by activating natural killer (NK) cells through the oxidative metabolite of the selenopeptide. By leveraging the advantages of size reduction and deselenization driven by reactive oxygen species, this selenopeptide can deliver therapeutics, such as doxorubicin (DOX), to solid tumors and programmatically activate NK cells. In vitro and in vivo results demonstrate the synergistic effect between DOX-induced chemotherapy and selenopeptide-induced immunotherapy, leading to improved antitumor efficacy. The selenopeptide holds promise as a stimuli-responsive immune modulator for versatile biomedical applications.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xiaoyu Sun, Lingling Li, Yubin Yang, Chunfeng Jia, Xiaolei Zhang, Jingxuan Wu, Zhe Zhu, Junsheng Wang, Jinjun Yang
Summary: A hyperbranched and amorphous microsphere was synthesized and incorporated into poly(L-lactic acid) (PLA) to enhance its flame retardancy and thermal stability. The addition of 10% ammonium polyphosphate (APP) and 5% hyperbranched and amorphous microsphere resulted in excellent flame-retardant performance and improved thermal stability for PLA.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Engineering, Environmental
Xiaolei Zhang, Jingxuan Wu, Zhanghua Xie, Qiaoqing Zhang, Chen Wang, Fude Liu, Jinjun Yang
Summary: In this work, the formation of transcrystals in poly(1,4-butylene adipate) (PBA) with the presence of bio-derived additive was reported. Thymine (TM) crystals, with biocompatibility and biodegradability, acted as an effective nucleator to increase the crystallization temperature and rate of PBA. This study also revealed that TM facilitated the generation of alpha-modification in PBA, accelerated the phase transition from beta to alpha, and tailored the polymorphism of PBA. Moreover, TM increased the thermal degradation temperature (T-d) and reduced the biodegradability of PBA. The mechanisms behind the formation of transcrystals, nucleation, polymorphism tailoring, enhanced T-d, and reduced biodegradability were proposed and discussed in depth.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Polymer Science
Jingxuan Wu, Xiaolei Zhang, Zhanghua Xie, Qiaoqing Zhang, Chen Wang, Gangzhen Jiao, Jinjun Yang
Summary: The research found that 3,4-dihydroxy hydrocinnamic acid (HCA) interacts with poly(1,4-butylene adipate) (PBA) through hydrogen bonding, resulting in a decrease in the crystallization temperature, rate, and degree of crystallinity. The content of HCA can be used to control the polymorphism and phase transition of PBA, as well as enhance its biodegradability.
POLYMER DEGRADATION AND STABILITY
(2022)
Review
Biochemistry & Molecular Biology
Lamei Guo, Jinjun Yang, Hao Wang, Yu Yi
Summary: Advances in nanotechnology have revolutionized cancer therapy. However, the presence of physiological barriers in the body has limited the effectiveness. Multistage self-assembled nanomaterials with stimuli-responsiveness, programmable delivery, and immune modulation show promising potential for improving cancer treatment efficacy.
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)
