Polymer Journal最新文献_第2页

Effects of cross-linking units on the heat resistance and heat insulation properties of polysilsesquioxane-based materials 交联单元对聚硅氧烷基材料耐热性和隔热性能的影响

IF 2.8 4区化学

Polymer Journal Pub Date : 2024-08-29 DOI: 10.1038/s41428-024-00953-2

Kosuke Tsutsui, Hiroyuki Koga, Yohei Adachi, Joji Ohshita

引用次数: 0

Molecular design of reactive polycaprolactone that can be induced into shape-memory materials promotes further functionalization 可诱导形成形状记忆材料的活性聚己内酯的分子设计可促进进一步功能化

IF 2.8 4区化学

Polymer Journal Pub Date : 2024-08-29 DOI: 10.1038/s41428-024-00948-z

Takumi Yoshida, Toru Hoshi, Takao Aoyagi

{"title":"Molecular design of reactive polycaprolactone that can be induced into shape-memory materials promotes further functionalization","authors":"Takumi Yoshida, Toru Hoshi, Takao Aoyagi","doi":"10.1038/s41428-024-00948-z","DOIUrl":"https://doi.org/10.1038/s41428-024-00948-z","url":null,"abstract":"In this study, polymers with different copolymerization composition ratios of α-chloro-ε-caprolactone (α-ClCL) and ε-caprolactone (ε-CL) were prepared using α-ClCL, which can polymerize on its own. The copolymers were prepared by using trimethylolpropane as the initiator, and acryloyl groups were added to the polymer ends to form macromonomers capable of cross-linking reactions. The functionalized macromonomers were confirmed to possess shape-memory properties when cross-flinked in film form by heat. The composition of the functional groups in the macromonomer could be adjusted by changing the ratio of α-ClCL to ε-CL used in the copolymerization. In addition, the chloro group introduced by α-ClCL was converted into an azide group. Both the cross-linked film with chloro groups and the film converted to azide groups prepared in this study exhibited shape-memory according to the softening point of the film. Through fluorescence microscopy, it was confirmed that the converted azide groups were modified with alkylated rhodamine B based on the click reaction. Furthermore, azide-assisted films are expected to add various functions through click reactions in the future.","PeriodicalId":20302,"journal":{"name":"Polymer Journal","volume":"40 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Kinetics and thermodynamics analysis of the polybenzimidazole adsorption onto carbon materials using adsorption isotherm measurements 利用吸附等温线测量法对碳材料上的聚苯并咪唑吸附进行动力学和热力学分析

IF 2.8 4区化学

Polymer Journal Pub Date : 2024-08-29 DOI: 10.1038/s41428-024-00950-5

A. B. M. Nazmul Islam, Nana Kayo, Yuki Motoishi, Ryo Hamano, Naoki Tanaka, Koichiro Kato, Tsuyohiko Fujigaya

{"title":"Kinetics and thermodynamics analysis of the polybenzimidazole adsorption onto carbon materials using adsorption isotherm measurements","authors":"A. B. M. Nazmul Islam, Nana Kayo, Yuki Motoishi, Ryo Hamano, Naoki Tanaka, Koichiro Kato, Tsuyohiko Fujigaya","doi":"10.1038/s41428-024-00950-5","DOIUrl":"https://doi.org/10.1038/s41428-024-00950-5","url":null,"abstract":"The surface modification of carbon materials is an effective method for enhancing the properties of carbon-based functional materials; particularly, the use of a polymer coating is advantageous owing to its intactness and simplicity. Polybenzimidazole (PBI) has been used to modify carbon surfaces, yet its adsorption behavior has not been thoroughly examined. In this study, the adsorption kinetics and thermodynamics of PBI adsorption on various types of carbon black with different surface morphologies and chemical compositions were analyzed via isotherm measurements. To determine the effects of the polymer, its adsorption behavior was compared to that of the PBI monomer (1,3-bis(1H-benzo[d]imidazol-2-yl)benzene (referred to as the PBI-unit)). The surface adsorption of PBI was slower than that of the PBI-unit; however, PBI exhibited a greater adsorption capacity. The PBI adsorption is an entropy-driven process, whereas PBI-unit adsorption is enthalpy-driven. The adsorption of PBI was more thermodynamically favorable on carbon surfaces with higher crystallinity (lower oxygenation) owing to the easier detachment of solvent molecules from the carbon surface, leading to a higher adsorption constant.","PeriodicalId":20302,"journal":{"name":"Polymer Journal","volume":"1 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Ion-conductive properties and lithium battery performance of composite polymer electrolytes filled with lignin derivatives 填充木质素衍生物的复合聚合物电解质的离子导电特性和锂电池性能

IF 2.8 4区化学

Polymer Journal Pub Date : 2024-08-28 DOI: 10.1038/s41428-024-00941-6

Zitong Liu, Takumi Karasawa, Wei Tan, Hikaru Minegishi, Yasuyuki Matsushita, Kazuhiro Shikinaka, Yuichiro Otsuka, Yoichi Tominaga

引用次数: 0

Polymer alloys with high thermal properties consisting of polyfunctional benzoxazine derived from an oligonuclear phenolic compound and bismaleimide 由低核酚类化合物衍生的多官能团苯并恶嗪和双马来酰亚胺组成的高热稳定性聚合物合金

IF 2.8 4区化学

Polymer Journal Pub Date : 2024-08-23 DOI: 10.1038/s41428-024-00947-0

Takumi Uramatsu, Sho Morinaga, Taichi Shibatsuka, Takehiro Kawauchi

{"title":"Polymer alloys with high thermal properties consisting of polyfunctional benzoxazine derived from an oligonuclear phenolic compound and bismaleimide","authors":"Takumi Uramatsu, Sho Morinaga, Taichi Shibatsuka, Takehiro Kawauchi","doi":"10.1038/s41428-024-00947-0","DOIUrl":"https://doi.org/10.1038/s41428-024-00947-0","url":null,"abstract":"Polymer alloy films were prepared by blending a polyfunctional benzoxazine monomer (OP-p), which was derived from an oligonuclear phenolic compound with a 4,4ʹ-dimethylenebiphenyl group as the phenol linker, and 4,4′-bismaleimidodiphenylmethane (BMI; 10–90 wt.%), followed by thermal curing up to 240 °C. The polymerization behavior was investigated via differential scanning calorimetry and Fourier transform infrared analyses; the results indicated that the obtained polymer alloys consisted of an AB crosslinked network structure formed through the ether linkage between the hydroxyl group of polybenzoxazine and the double bond of BMI. The obtained polymer alloy films were self-standing, homogeneous, and transparent. Based on the dynamic mechanical analysis of the films, the glass transition temperature (Tg) increased to 228 °C and 329 °C for the polymer alloy films with BMI contents of 60 wt.% and 75 wt.%, respectively, which were higher than those of the POP-p or PBMI homopolymer. Despite the improvement in the Tg, the alloy films exhibited sufficient toughness as evidenced via the tensile test. Moreover, thermogravimetric analysis of the polymer alloys revealed that the thermal stability increased with increasing BMI content.","PeriodicalId":20302,"journal":{"name":"Polymer Journal","volume":"23 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Role of flexible spacers in achieving photoinduced phase transitions of azobenzene-based liquid-crystalline polymers at room temperature 柔性间隔物在实现室温下偶氮苯基液晶聚合物光诱导相变中的作用

IF 2.3 4区化学

Polymer Journal Pub Date : 2024-08-23 DOI: 10.1038/s41428-024-00946-1

Yujin Kang, Donguk Kim, Wonho Lee, Changyeon Lee

{"title":"Role of flexible spacers in achieving photoinduced phase transitions of azobenzene-based liquid-crystalline polymers at room temperature","authors":"Yujin Kang, Donguk Kim, Wonho Lee, Changyeon Lee","doi":"10.1038/s41428-024-00946-1","DOIUrl":"10.1038/s41428-024-00946-1","url":null,"abstract":"The photoinduced solid‒liquid phase transition is a fascinating phenomenon that can be utilized for a range of applications, including debondable adhesives, photolithography, and soft actuators; however, developing polymers with this function is not trivial. In this work, we report an azobenzene (Azo)-containing polymer capable of rapid room-temperature photoliquefaction upon UV irradiation and elucidate the design principles for photoliquefying polymers that harness the photothermal effect. We prepare a series of Azo polymers by coupling diacrylate Azo with dithiol-functionalized flexible spacers of different lengths, such as ethylene glycol (EG), hexa(ethylene glycol) (HEG), and poly(ethylene glycol) (PEG). EG-Azo, with the shortest spacer, has a high melting temperature (Tm) of 78 °C due to the strong interactions among the liquid-crystalline Azo molecules. Owing to the high Tm, EG-Azo does not exhibit a photoinduced solid‒liquid phase transition, although it has the greatest photothermal effect among the polymers (temperature rise to 50 °C). The incorporation of the longer spacers effectively decreases the Tm of the Azo polymers. For example, PEG-Azo possesses a reduced Tm of 40 °C, thereby enabling photoliquefaction at room temperature after only 1 min of UV irradiation. PEG-Azo can be reversibly returned to a solid-state within 5 min after the UV light is turned off. This work shows that the length of flexible spacers in azobenzene (Azo)-based polymers is crucial for achieving room-temperature photoliquefaction (i.e., UV light-induced solid‒liquid phase transition). By adjusting the length of dithiol-functionalized flexible spacers, the melting temperature (Tm) of Azo polymers can be effectively modulated. Incorporating longer spacers decreases the Tm to a temperature achievable by the photothermal effect of Azo molecules, thus enabling photoliquefaction of Azo polymers at room temperature.","PeriodicalId":20302,"journal":{"name":"Polymer Journal","volume":"56 11","pages":"1061-1067"},"PeriodicalIF":2.3,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41428-024-00946-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermoresponsive behavior of dual hydrophilic diblock copolymers prepared via organotellurium-mediated living radical polymerization 通过有机碲介导的活自由基聚合制备的双亲水二嵌段共聚物的热致伸缩行为

IF 2.8 4区化学

Polymer Journal Pub Date : 2024-08-16 DOI: 10.1038/s41428-024-00952-3

Misato Hayashi, Rintaro Takahashi, Thi Ngan Vu, Kazuaki Matsumura, Shigeru Yamago, Shin-ichi Yusa

{"title":"Thermoresponsive behavior of dual hydrophilic diblock copolymers prepared via organotellurium-mediated living radical polymerization","authors":"Misato Hayashi, Rintaro Takahashi, Thi Ngan Vu, Kazuaki Matsumura, Shigeru Yamago, Shin-ichi Yusa","doi":"10.1038/s41428-024-00952-3","DOIUrl":"https://doi.org/10.1038/s41428-024-00952-3","url":null,"abstract":"This study prepared dual thermoresponsive diblock copolymers (E95Nn; n = 93 and 291) comprising poly(ethylene glycol) ethyl ether acrylate (PeDEGA; E) and poly(N-isopropylacrylamide) (PNIPAM; N) blocks with different lower critical solution temperatures (LCSTs). E95Nn was prepared via organotellurium-mediated living radical polymerization through a one-pot synthesis method. Energy-dispersive X-ray spectroscopy revealed that tellurium residue at the polymer chain end was removed during purification via dialysis. The LCST of the PeDEGA was lower than that of PNIPAM. At temperatures below the LCST of PeDEGA, E95Nn dissolved as a single polymer chain (the unimer state). When an aqueous solution of E95Nn was heated, polymer micelles with a PeDEGA core and PNIPAM shells formed above the LCST of the PeDEGA. In pure water, 7–10 polymer micelles formed intermicellar aggregates. The polymer micelles encapsulated hydrophobic guest molecules into the hydrophobic core formed from the PeDEGA chains. Large intermicellar aggregates formed above the LCST of PNIPAM owing to hydrophobic interactions between the PNIPAM shells. It is expected that E95Nn polymer micelles can be applied as drug carriers for thermoresponsive controlled drug release.","PeriodicalId":20302,"journal":{"name":"Polymer Journal","volume":"8 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 and controlled radical polymerization of axially chiral monomers with a binaphthyl skeleton 具有双萘基骨架的轴向手性单体的合成和受控自由基聚合反应

IF 2.3 4区化学

Polymer Journal Pub Date : 2024-08-13 DOI: 10.1038/s41428-024-00944-3

Kuiyong Jia, Zhe Chen, Zhujun Huang, Xiangcheng Pan

{"title":"Synthesis and controlled radical polymerization of axially chiral monomers with a binaphthyl skeleton","authors":"Kuiyong Jia, Zhe Chen, Zhujun Huang, Xiangcheng Pan","doi":"10.1038/s41428-024-00944-3","DOIUrl":"10.1038/s41428-024-00944-3","url":null,"abstract":"The synthesis of optically active polymers from monomers with chiral central centers is a well-established method, but reports on the synthesis of optically active polymers using axially chiral monomers are limited. In this study, we present the controlled radical polymerization of axially chiral monomers derived from the commercially available 1,1′-bi-2-naphthol (BINOL) structure. A series of optically active polymers based on the axially chiral structures were successfully polymerized using cumyl dithiobenzoate (CDB) as a chain transfer agent (CTA) for the reversible addition-fragmentation chain transfer (RAFT) polymerization. The polymerization process resulted in polymers with high conversions and yield controlled molecular weights. The differences observed in the specific optical rotation and the circular dichroism (CD) signal intensity between the polymers and the monomers confirmed the synthesis of optically active polymers with specific structures. Owing to their unique molecular scaffold, these chiral polymers have promising applications in areas such as chiral separation and catalysis. The graphical abstract shows the controlled radical polymerization of axially chiral monomers bearing a 1,1′-bi-2-naphthol (BINOL) skeleton. The evident increase in magnitude and opposite deflection direction of the specific optical rotation between the synthesized polymer and the monomer confirms the synthesis of the chiral polymers with specific structures.","PeriodicalId":20302,"journal":{"name":"Polymer Journal","volume":"56 11","pages":"987-995"},"PeriodicalIF":2.3,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41428-024-00944-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soft electroactive polymer actuators based on regioregular/regiorandom-poly(3-hexylthiophene) blends with a nanofiber structure 基于具有纳米纤维结构的正规/非正规聚（3-己基噻吩）共混物的软电活性聚合物致动器

IF 2.8 4区化学

Polymer Journal Pub Date : 2024-08-13 DOI: 10.1038/s41428-024-00949-y

Yoshihiro Murasawa, Tomoya Yoshii, Takumi Suzuki, Takeshi Shimomura

引用次数: 0

Solar-driven photocatalytic hydrogen production thiophene-quinoxaline-based polymer dots with tunable molecular weight 太阳能驱动的光催化制氢噻吩-喹喔啉基可调分子量聚合物点

IF 2.3 4区化学

Polymer Journal Pub Date : 2024-08-08 DOI: 10.1038/s41428-024-00945-2

Islam M. A. Mekhemer, Yi-Chieh Chiu, Mohamed M. Elsenety, Ahmed M. Elewa, Dalia M. Dorrah, Khanh Do Gia Huynh, Dung Chau Kim Hoang, Chia-Chih Chang, Ho-Hsiu Chou

{"title":"Solar-driven photocatalytic hydrogen production thiophene-quinoxaline-based polymer dots with tunable molecular weight","authors":"Islam M. A. Mekhemer, Yi-Chieh Chiu, Mohamed M. Elsenety, Ahmed M. Elewa, Dalia M. Dorrah, Khanh Do Gia Huynh, Dung Chau Kim Hoang, Chia-Chih Chang, Ho-Hsiu Chou","doi":"10.1038/s41428-024-00945-2","DOIUrl":"10.1038/s41428-024-00945-2","url":null,"abstract":"Organic conjugated polymer dots (Pdots) are considered promising photocatalysts for solar-driven hydrogen production. However, the impact of molecular weight on their photocatalytic activity remains unexplored. In this study, four thiophene-quinoxaline (PTQ)-based Pdots (D-A system) with tunable molecular weights were fabricated to elucidate the effects of molecular weight on Pdot photocatalytic activity. These Pdots serve as highly efficient and stable photocatalysts for visible-light-driven hydrogen generation in a solvent-free organic system, which was achieved for the first time. Low-molecular-weight Pdots exhibited minimal aggregation, small particle sizes, uniform morphology, enhanced charge transfer capability, and superior photocatalytic activity with remarkable photostability. Notably, L-PTQ10 and L-PTQ11 demonstrated exceptional hydrogen evolution rates of 15,807 and 10,411 μmol g−¹ h−¹, respectively, when coupled with a Pt cocatalyst. The findings from our DFT and molecular dynamics (MD) calculations strongly support our hypothesis, highlighting the use of low-molecular-weight PTQ-based Pdots as a promising strategy to develop efficient and stable photocatalysts for solar-driven hydrogen production. This study presents the synthesis of thiophene-quinoxaline (PTQ)-based polymer dots (Pdots) with tunable molecular weights (D-A system) for the first time. Remarkably, Low-molecular weight Pdots exhibit minimal aggregation, small size, and enhanced charge transfer, leading to superior photocatalytic activity and remarkable photostability.","PeriodicalId":20302,"journal":{"name":"Polymer Journal","volume":"56 11","pages":"1079-1088"},"PeriodicalIF":2.3,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41428-024-00945-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0