Chinese Journal of Polymer Science最新文献_第5页

Spherical Magnetic Fe-Alginate Microgels Fabricated by Droplet-Microfluidics Combining with an External Crosslinking Approach and the Study of Their pH Dependent Fe3+ Release Behaviors 通过液滴-微流体技术结合外部交联方法制备的球形磁性海藻酸铁微凝胶及其随 pH 值变化的 Fe3+ 释放行为研究

IF 4.1 2区化学

Chinese Journal of Polymer Science Pub Date : 2024-12-05 DOI: 10.1007/s10118-025-3257-2

Jie Chen, Run-Yu Yu, Kai-Qi Wang, Zhe-Yu Zhang, Arezoo Ardekani, Yuan-Du Hu

引用次数: 0

Multi-Cyclic Swelling for Self-Regulated Growth of Covalently Crosslinked Polymers 共价交联聚合物自调节生长的多循环膨胀

IF 4.1 2区化学

Chinese Journal of Polymer Science Pub Date : 2024-12-05 DOI: 10.1007/s10118-025-3268-z

De-Fu Zhu, Hong Wang, Jian Chen, Xin-Hong Xiong, Jia-Xi Cui

引用次数: 0

Conformation and Dynamics of a Long Active Polymer Chain Confined in a Circular Cavity 圆形腔内长活性聚合物链的构象和动力学

IF 4.1 2区化学

Chinese Journal of Polymer Science Pub Date : 2024-11-28 DOI: 10.1007/s10118-024-3245-y

Xiao Yang, Yan-Li Zhou, Bin Zhao, Chao Wang, Meng-Bo Luo

{"title":"Conformation and Dynamics of a Long Active Polymer Chain Confined in a Circular Cavity","authors":"Xiao Yang, Yan-Li Zhou, Bin Zhao, Chao Wang, Meng-Bo Luo","doi":"10.1007/s10118-024-3245-y","DOIUrl":"10.1007/s10118-024-3245-y","url":null,"abstract":"<div><p>The conformational and dynamical properties of a long semi-flexible active polymer chain confined in a circular cavity are studied by using Langevin dynamics simulation method. Results show that the steady radius of gyration of the polymer decreases monotonically with increasing the active force. Interestingly, the polymer forms stable compact spiral with directional rotation at the steady state when the active force is large. Both the radius of gyration and the angular velocity of the spiral are nearly independent of the cavity size, but show scaling relations with the active force and the polymer length. It is further found that the formation of the stable compact spiral in most cases is a two-step relaxation process, where the polymer first forms a metastable swelling quasi spiral and then transforms into the stable compacted spiral near the wall of the cavity. The relaxation time is mainly determined by the transformation of the swelling quasi spiral, and shows remarkable dependence on the size of the cavity. Specially, when the circumference of the circular is nearly equivalent to the polymer length, it is difficult for the polymer to form the compacted spiral, leading to a large relaxation time. The underlying mechanism of the formation of the compacted spiral is revealed.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 1","pages":"225 - 234"},"PeriodicalIF":4.1,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recyclable and Self-healable Polydimethylsiloxane Elastomers Based on Knoevenagel Condensation 基于Knoevenagel缩合的可回收自愈聚二甲基硅氧烷弹性体

IF 4.1 2区化学

Chinese Journal of Polymer Science Pub Date : 2024-11-25 DOI: 10.1007/s10118-024-3248-8

Yao-Wei Zhu, Tong-Tong Man, Ming-Ming Zhao, Jia-Yi Chen, Yu Yan, Xiao-Nong Zhang, Li Chen, Chun-Sheng Xiao

{"title":"Recyclable and Self-healable Polydimethylsiloxane Elastomers Based on Knoevenagel Condensation","authors":"Yao-Wei Zhu, Tong-Tong Man, Ming-Ming Zhao, Jia-Yi Chen, Yu Yan, Xiao-Nong Zhang, Li Chen, Chun-Sheng Xiao","doi":"10.1007/s10118-024-3248-8","DOIUrl":"10.1007/s10118-024-3248-8","url":null,"abstract":"<div><p>Elastomers are widely used in various fields owing to their excellent tensile properties. Recyclable and self-healing properties are key to extending the service life of elastomers. Accumulating evidence indicates that dynamic covalent chemistry has emerged as a powerful tool for constructing recyclable and self-healing materials. In this work, we demonstrate the preparation of a recyclable and self-healable polydimethylsiloxane (PDMS) elastomer based on the Knoevenagel condensation (KC) reaction. This PDMS elastomer was prepared by the KC reaction catalyzed by 4-dimethylaminopyridine (DMAP). The obtained PDMS elastomer exhibited an elongation at break of 266%, a tensile strength of 0.57 MPa, and a good thermal stability (<i>T</i><sub>d</sub>=357 °C). In addition, because of the presence of dynamic C = C bonds formed by the KC reaction and low glass transition temperature (<i>T</i><sub>g</sub>=−117 °C). This PDMS exhibited good self-healing and recycling properties at room temperature and could be reprocessed by hot pressing. In addition, the PDMS elastomer exhibits good application prospects in the fields of adhesives and flexible electronic devices.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 1","pages":"53 - 60"},"PeriodicalIF":4.1,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Methyl Groups Pendant on Triphenylmethane Toward Modulating Thermal Stability and Dielectric Properties of the Crosslinkable Fluorinated Polyimide Films with High Transparency 三苯基甲烷上甲基对高透明交联氟化聚酰亚胺薄膜热稳定性和介电性能的调节

IF 4.1 2区化学

Chinese Journal of Polymer Science Pub Date : 2024-11-25 DOI: 10.1007/s10118-024-3243-0

Wen Yang, Liang Yuan, Kai Gong, Ruo-Han Zhang, Lan Lei, Hui Li

{"title":"Methyl Groups Pendant on Triphenylmethane Toward Modulating Thermal Stability and Dielectric Properties of the Crosslinkable Fluorinated Polyimide Films with High Transparency","authors":"Wen Yang, Liang Yuan, Kai Gong, Ruo-Han Zhang, Lan Lei, Hui Li","doi":"10.1007/s10118-024-3243-0","DOIUrl":"10.1007/s10118-024-3243-0","url":null,"abstract":"<div><p>It is urgent to develop high-performance polyimide (PI) films that simultaneously exhibit high transparency, exceptional thermal stability, mechanical robustness, and low dielectric to fulfil the requirements of flexible display technologies. Herein, a series of fluorinated polyimide films (FPIs) were fabricated by the condensation of 5,5′-(perfluoropropane-2,2-diyl) bis(isobenzofuran-1,3-dione) (6FDA) and the fluorinated triphenylmethane diamine monomer (EDA, MEDA and DMEDA) with heat-crosslinkable tetrafluorostyrene side groups, which was incorporated by different numbers of methyl groups pendant in the ortho position of amino groups. Subsequently, the FPI films underwent heating to produce crosslinking FPIs (C-FPIs) through the self-crosslinking of double bonds in the tetrafluorostyrene. The transparency, solvent resistance, thermal stability, mechanical robustness and dielectric properties of FPI and C-FPI films can be tuned by the number of methyl groups and crosslinking, which were deeply investigated by virtue of molecular dynamics (MD) simulations and density functional theory (DFT). As a result, all the films exhibited exceptional optically colorless and transparent, with transmittance in the visible region of 450–700 nm exceeding 79.9%, and the cut-off wavelengths (<i>λ</i><sub>off</sub>) were nearly 350 nm. The thermal decomposition temperatures at 5% weight loss (<i>T</i><sub>d5%</sub>) for all samples exceeded 504 °C. These films exhibited a wide range of tunable tensile strength (46.5–75.1 MPa). Significantly, they showed exceptional dielectric properties with the dielectric constant of 2.3–2.5 at full frequency (10<sup>7</sup>–20 Hz). This study not only highlights the relationship between the polymer molecular structure and properties, but offer insights for balancing optical transparency, heat resistance and low dielectric constant in PI films.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 2","pages":"316 - 327"},"PeriodicalIF":4.1,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Liquid Crystalline Hydrogel Capable of Thermally-induced Dual Actuation 热致双致动液晶水凝胶

IF 4.1 2区化学

Chinese Journal of Polymer Science Pub Date : 2024-11-25 DOI: 10.1007/s10118-025-3251-8

Yi-Ming Chen, Yue Zhao

{"title":"Liquid Crystalline Hydrogel Capable of Thermally-induced Dual Actuation","authors":"Yi-Ming Chen, Yue Zhao","doi":"10.1007/s10118-025-3251-8","DOIUrl":"10.1007/s10118-025-3251-8","url":null,"abstract":"<div><p>Stimuli-responsive shape-changing materials, particularly hydrogel and liquid crystal elastomer (LCE), have demonstrated significant potential for applications across various fields. Although intricate deformation and actuation behaviors have been obtained in either hydrogels or LCEs, they typically undergo reversible shape change only once (<i>e.g.</i>, one expansion plus one contraction) during one heating/cooling cycle. Herein, we report a study of a novel liquid crystalline hydrogel (LCH) and the achievement of dual actuation in a single heating/cooling cycle by integrating the characteristics of thermoresponsive hydrogel and LCE. The dual actuation behavior arises from the reversible volume phase transition of poly(<i>N</i>-isopropylacrylamide) (PNIPAM) and the reversible order-disorder phase transition of LC mesogens in the LCH. Due to a temperature window separating the two transitions belonging to PNIPAM and LCE, LCH actuator can sequentially execute their respective actuation, thus deforming reversibly twice, during a heating/cooling cycle. The relative actuation degree of the two mechanisms is influenced by the mass ratio of PNIPAM to LCE in the LCH. Moreover, the initial shape of a bilayer actuator made with an active LCH layer and a passive polymer layer can be altered through hydration or dehydration of PNIPAM, which further modifies the dual actuation induced deformation. This work provides an example that shows the interest of developing LCH actuators.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 4","pages":"563 - 571"},"PeriodicalIF":4.1,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Proline-Derived Helical Copolyacetylenes as Chiral Stationary Phases for HPLC Enantioseparation 脯氨酸衍生螺旋型共聚物乙炔作为手性固定相的合成及其对映体分离

IF 4.1 2区化学

Chinese Journal of Polymer Science Pub Date : 2024-11-25 DOI: 10.1007/s10118-024-3249-7

Yue Li, Shu-Ming Kang, Ge Shi, Yi-Fu Chen, Bo-Wen Li, Jie Zhang, Xin-Hua Wan

{"title":"Synthesis of Proline-Derived Helical Copolyacetylenes as Chiral Stationary Phases for HPLC Enantioseparation","authors":"Yue Li, Shu-Ming Kang, Ge Shi, Yi-Fu Chen, Bo-Wen Li, Jie Zhang, Xin-Hua Wan","doi":"10.1007/s10118-024-3249-7","DOIUrl":"10.1007/s10118-024-3249-7","url":null,"abstract":"<div><p>A series of optically active copolymers with various feed ratios have been synthesized through helix-sense-selective copolymerization catalyzed by [Rh(norbornadiene)Cl]<sub>2</sub>-triethylamine. This process involves two proline-derived acetylene monomers, (<i>S</i>)-<i>N</i>-(4-chlorophenyl)carbamoyl-2-ethynyl pyrrolidine (MCl) and (<i>S</i>)-<i>N</i>-(<i>tert</i>-butoxycarbonyl)-2-ethynyl pyrrolidine, followed by acidic deprotection and neutralization. These copolymers adopt helical conformations with a preferred handedness, as demonstrated by nuclear magnetic resonance spectroscopy and a series of spectroscopic analyses. The chiroptical activity intensity of copolymer has been found to increase with MCl content. Consequently, the enantioseparation capabilities of copolymers containing 95 mol%, 90 mol%, and 85 mol% MCl units have been assessed as chiral stationary phases in high-performance liquid chromatography because of their good chiroptical activities. These chiral stationary phases effectively enantioseparate racemic alcohols, sulfoxides, amides, and metal complexes. Notably, the copolymer with 90 mol% MCl shows superior chiral recognition ability, especially for 1-(2,4-dichlorophenyl)-2-(1<i>H</i>-imidazol-1-yl)ethanol (<i>α</i>=1.19) and 4-methylbenzenesulfinamide (<i>α</i>=1.47). Insights from molecular dynamic simulation and autodock analysis indicate that hydrogen bonding and <i>π-π</i> stacking interactions between the chiral stationary phases and enantiomers play a key role for successful chiral separation. Our contribution not only demonstrates the importance of hydrogen bonding donor and copolymer chiroptical activity of chiral stationary phases for chiral resolution, but will also provide valuable insights for the future development of novel stationary phases.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 1","pages":"61 - 69"},"PeriodicalIF":4.1,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temperature-sensitive Micelles as Artificial Chaperones for Insulin Protection 温度敏感胶束作为胰岛素保护的人工伴侣

IF 4.1 2区化学

Chinese Journal of Polymer Science Pub Date : 2024-11-25 DOI: 10.1007/s10118-024-3244-z

Jia-Wen Chen, Yan Xiao, Mei-Dong Lang

{"title":"Temperature-sensitive Micelles as Artificial Chaperones for Insulin Protection","authors":"Jia-Wen Chen, Yan Xiao, Mei-Dong Lang","doi":"10.1007/s10118-024-3244-z","DOIUrl":"10.1007/s10118-024-3244-z","url":null,"abstract":"<div><p>Insulin is an essential and versatile protein taking part in the control of blood glucose levels and protein anabolism. However, under prolonged storage or high temperature stress, insulin tends to unfold and aggregate into toxic amyloid fibrils, leading to loss of physiological function. Inspired by natural chaperones, a series of temperature-sensitive polycaprolactone-based micelles were designed to prevent insulin from deactivation. The micelles were fabricated through the self-assembly of amphiphilic copolymers of methoxy poly(ethylene glycol)-poly(4-diethylformamide caprolactone-<i>co</i>-caprolactone) (mPEG<sub>17</sub>-P(DECL-<i>co</i>-CL)), which had a regular spherical morphology with particle sizes of about 100 nm. In addition, the lower critical solution temperature (LCST) of the micelles could be tuned to 9 and 29 °C by changing the ratio of DECL to CL. Benefiting from the temperature-sensitivity of DECL segment, the binding ability of micelles to insulin could be modulated by changing the temperature. Above LCST, micelles effectively inhibited insulin aggregation and protected it from thermal inactivation due to the strong binding ability between the hydrophobic segment DECL and insulin. Below LCST, DECL segment returned to hydrophilic and bound weakly with insulin, leading to the release of insulin and assisting in its recovery of secondary structure. Thus, these temperature-sensitive micelles provided an effective strategy for insulin protection.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 2","pages":"350 - 359"},"PeriodicalIF":4.1,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polymer Fibers Based on Dynamic Covalent Chemistry 基于动态共价化学的聚合物纤维

IF 4.1 2区化学

Chinese Journal of Polymer Science Pub Date : 2024-11-25 DOI: 10.1007/s10118-024-3246-x

Luzhi Zhang, Xiaozhuang Zhou, Xinhong Xiong, Jiaxi Cui

引用次数: 0

Role of Stretching-induced Crystallization on Mesoscale Morphology Transition of UHMWPE during Hot Stretching 热拉伸过程中拉伸诱导结晶对超高分子量聚乙烯中尺度形貌转变的影响

IF 4.1 2区化学

Chinese Journal of Polymer Science Pub Date : 2024-11-14 DOI: 10.1007/s10118-024-3242-1

Kai Huang, Jia-Jia Mo, Wen-Jing Shi, Shi-Tong Wang, Hong-Hui Shi, Chun-Guang Shao, Chun-Tai Liu, Bao-Bao Chang

{"title":"Role of Stretching-induced Crystallization on Mesoscale Morphology Transition of UHMWPE during Hot Stretching","authors":"Kai Huang, Jia-Jia Mo, Wen-Jing Shi, Shi-Tong Wang, Hong-Hui Shi, Chun-Guang Shao, Chun-Tai Liu, Bao-Bao Chang","doi":"10.1007/s10118-024-3242-1","DOIUrl":"10.1007/s10118-024-3242-1","url":null,"abstract":"<div><p>In this work, a morphology transition mode is revealed in ultra-high molecular weight polyethylene (UHMWPE) when stretching at 120 °C: moving from the slightly deformed region to the necked region, the morphology transfers from small spherulites to a mixture of transcrystalline and enlarged spherulites, and finally to pure transcrystalline; meanwhile, the lamellae making up the transcrystalline or spherulite were fragmented into smaller ones; spatial scan by wide-angle X-ray scattering (WAXS) and small angle X-ray scattering (SAXS) revealed that the crystallinity is increased from 25.3% to 30.1% and the crystal orientation was enhanced greatly, but the lamellae orientation was quite weak. The rise of enlarged spherulites or a mixture of transcrystalline and spherulites can also be found in UHMWPE stretched at 140 and 148 °C, whereas absent in UHMWPE stretched at 30 °C. <i>In situ</i> WAXS/SAXS measurements suggest that during stretching at 30 °C, the crystallinity is reduced drastically, and a few voids are formed as the size increases from 50 nm to 210 nm; during stretching at 120 °C, the crystallinity is reduced only slightly, and the kinking of lamellae occurs at large Hencky strain; during stretching at 140 and 148 °C, an increase in crystallinity with stretching strain can be found, and the lamellae are also kinked. Taking the microstructure and morphology transition into consideration, a mesoscale morphology transition mode is proposed, in the stretching-induced crystallization the fragmented lamellae can be rearranged into new supra-structures such as spherulite or transcrystalline during hot stretching.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 1","pages":"188 - 198"},"PeriodicalIF":4.1,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0