Reactive & Functional Polymers最新文献

{"title":"Rubber-assisted and modulated epoxy topological network for developing fatigue-resistant, high-strain-cycle high performance shape memory polymer composites","authors":"Yiyuan Sun ,&nbsp;Zenghui Yang ,&nbsp;Liming Tao ,&nbsp;Qihua Wang ,&nbsp;Xinrui Zhang ,&nbsp;Yaoming Zhang ,&nbsp;Tingmei Wang","doi":"10.1016/j.reactfunctpolym.2024.106095","DOIUrl":"10.1016/j.reactfunctpolym.2024.106095","url":null,"abstract":"<div><div>High performance shape memory polymer (HPSMP) has a wide range of application such as smart device, smart mold. In this study, we designed a rigid-flexible shape memory epoxy with flexible chain segment as the main chain and rigid benzene ring as the side group. Meanwhile, carboxyl-terminated nitrile butadiene rubber (CTBN) was accessed into the epoxy main chain as a fatigue-resistant functional filler. The results showed that the flexible backbone plays a major role in improving the ductility. The superior fatigue-resistant shape memory cycling performance was synergistically achieved by modulating the epoxy topological network through altering the disulfide cross-linker prompted by CTBN, and the materials exhibited good high and low-temperature resistant mechanical properties. Comparatively, it is found that disulfide bonding can significantly improve the tensile property and thermal stability for epoxy. The synergistic effect between the elastic chain segments in CTBN and the flexible backbone achieves excellent shape recovery ratio. Therefore, the rational structural design provides an effective way to develop HPSMP, which can expand the application areas for HPSMP.</div></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"205 ","pages":"Article 106095"},"PeriodicalIF":4.5,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biocidal polymer coatings based on porphyrin-modified epoxy-amine networks","authors":"A.M. Tsyklinskaya ,&nbsp;D.A. Polivanovskaia ,&nbsp;N.E. Grammatikova ,&nbsp;E.S. Zhavoronok ,&nbsp;K.P. Birin ,&nbsp;I.N. Senchikhin","doi":"10.1016/j.reactfunctpolym.2024.106099","DOIUrl":"10.1016/j.reactfunctpolym.2024.106099","url":null,"abstract":"<div><div>For the first time, a pronounced biocidal activity of modified polymers with a porphyrin content of 21.4 μM (0.002 wt%) against <em>Staphylococcus aureus</em> was demonstrated. In order to develop new biocidal polymer coatings, a study was carried out on diglycidyl ether of bisphenol A (DGEBA) and porphyrin-modified oligomeric diamine systems. The study investigated the solubility of porphyrins in oligomers through experimental and theoretical means, using Van Krevelen's approach of additive group contributions. Fully cured epoxy-amine polymer materials modified with varied free-base tetraarylporphyrins were obtained. The materials were studied by means of thermogravimetry, differential scanning calorimetry, UV–Vis and fluorescence spectroscopy. The proposed approach to the formation of modified epoxy-amine materials allows preservation of the photophysical properties of porphyrins, including their photostability. The addition of modifiers in 4.28–21.4 μM range of concentrations makes it possible to keep the thermophysical and thermochemical properties of the polymer matrix.</div></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"205 ","pages":"Article 106099"},"PeriodicalIF":4.5,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of bio-based epoxy resins: Impact of amine hardeners on thermal, thermomechanical, optical and electrical properties of epoxidized resveratrol with high Tg","authors":"Isaac Isarn ,&nbsp;Ignacio Collado ,&nbsp;Alberto Jiménez-Suárez ,&nbsp;Silvia G. Prolongo","doi":"10.1016/j.reactfunctpolym.2024.106080","DOIUrl":"10.1016/j.reactfunctpolym.2024.106080","url":null,"abstract":"<div><div>Epoxidized resveratrol (RES) has been cured with different amines in order to compare their possibilities to obtain high-temperature resistance of bio-based epoxy resins. Materials obtained from the bio-based monomer present glass transition temperatures (T_g) among the highest ever reported for an epoxy-amine curing system, with extremely high char residue, making them excellent candidates for extremely high-temperature applications. Particularly, epoxidized RES stoichiometrically cured with 4,4′-sulfonyldianiline (DDS) reached 297 °C, measured as the tan <em>δ</em> peak by DMTA, and two other materials, using 4,4′-methylenedianiline (DDM) and 4,4′-diaminodicyclohexylmethane (CAA) as curing agents, exceeded 300 °C. In fact, the material begins to degrade before the chains are fully relaxed, so they are thermosetting that never go completely into the rubbery state. Additionally, this resin improves the direct current (DC) insulating character (∼10¹⁵ Ωcm) while decreasing the optical band gap (∼2 eV) when compared to other epoxy resins available, which is of great interest for photovoltaic applications. Moreover, some of the materials presented a very high char residue proportion when heated (&gt;40 wt% at 800 °C under nitrogen atmosphere), presenting good fire-retardant properties.</div></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"205 ","pages":"Article 106080"},"PeriodicalIF":4.5,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thiolated RAFT-PISA nano-templates power on luminescent copper nanoclusters (CuNCs) for selective mercury (II) detection","authors":"Olga García,&nbsp;Isabel Quijada-Garrido","doi":"10.1016/j.reactfunctpolym.2024.106084","DOIUrl":"10.1016/j.reactfunctpolym.2024.106084","url":null,"abstract":"<div><div>In this study, we expand the scope of polymerization-induced self-assembly (PISA) by modifying one of the most prototypical copolymers derived from RAFT-mediated PISA, poly(glycerol methacrylate)-<em>b</em>-poly(hydroxypropyl methacrylate) (pGMA-<em>b</em>-pHPMA), by incorporating a comonomer with a protected thiol group-2-(acetylthio)ethyl methacrylate (AcSEMA) into the hydrophobic block. The photoinitiated synthesis of pGMA-<em>b</em>-p(HPMA-<em>co</em>-AcSEMA) was conducted in a water/ethanol mixture (60/40 <em>v</em>/v) to increase the solubility of AcSEMA. Thus, this modification enabled the formation of diverse polymeric nano-morphologies such as spheres, worms, and vesicles, dictated by the balance between hydrophilic and hydrophobic block ratios and the AcSEMA content. Besides, the strong metal affinity of thiol groups makes the incorporation of AcSEMA into self-assembled nanostructures a versatile platform for generating advanced hybrid materials with potential applications in biomedicine, sensing, catalysis, or water purification. As evidenced in this work, the post-hydrolysis of the thioacetate group into thiol allowed the use of polymeric nano-objects as templates to power on the luminescenece of functionalized copper nanoclusters (CuNCs). These polymeric CuNCs, composed of several to hundreds of copper atoms, exhibit remarkable red emission, positioning the synthesized hybrids as promising luminescent probes for the development of highly selective “switch-off” luminescent sensors for Hg²⁺ detection. This work paves the way for the design of multifunctional hybrid nanomaterials with advanced applications.</div></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"205 ","pages":"Article 106084"},"PeriodicalIF":4.5,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of UV curable acrylamide modified epoxy resin and performance in 3D printing","authors":"Lishuang Yang,&nbsp;Jiayue Wang,&nbsp;Ruili Li,&nbsp;Yujie Gao,&nbsp;Huashan Wang","doi":"10.1016/j.reactfunctpolym.2024.106093","DOIUrl":"10.1016/j.reactfunctpolym.2024.106093","url":null,"abstract":"<div><div>A novel UV-curable 3D printing resin was synthesized by combining diglycidyl ether of bisphenol A (DGEBA) and acrylamide (AAM) to create a UV-curable acrylamide-modified epoxy resin prepolymer. This prepolymer was then uniformly mixed with the photoinitiator TPO and the reactive diluent hydroxyethyl methacrylate (HEMA). By adjusting the prepolymer content, UV-curable 3D printing resins were formulated with prepolymer concentrations of 30 wt%, 40 wt%, and 50 wt%, respectively. Infrared spectroscopy and nuclear magnetic resonance studies indicated that the amino groups in acrylamide reacted with the epoxy groups. When the prepolymer was added at concentrations of 30 wt% and 40 wt%, the viscosity met the requirements for UV-curable 3D printing. Upon completion of curing, these three distinct resins exhibited high mechanical strength, with tensile strength reaching up to 59.42 MPa and flexural strength peaking at 72.25 MPa. The elongation at break ranged from 2.60 % to 4.91 %. Scanning electron microscopy was used to examine the UV-cured 3D printed samples, and comparison with the design files revealed that the printed samples exhibited excellent dimensional stability. The study results indicated that this novel UV-curable epoxy vinyl resin formulation possessed excellent mechanical properties, suitable curing characteristics, and high resolution, making it a highly promising prepolymer for UV-curable 3D printing.</div></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"205 ","pages":"Article 106093"},"PeriodicalIF":4.5,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Repurposing trityl-substituted triphenylamine-based polyimides for gas separation membranes by blending with a fluorinated polyimide","authors":"Adriana-Petronela Chiriac ,&nbsp;Catalin-Paul Constantin ,&nbsp;Mihai Asandulesa ,&nbsp;Violeta Melinte ,&nbsp;Andrzej Jankowski ,&nbsp;Mariana-Dana Damaceanu","doi":"10.1016/j.reactfunctpolym.2024.106081","DOIUrl":"10.1016/j.reactfunctpolym.2024.106081","url":null,"abstract":"<div><div>In the attempt to develop gas separation membranes by reusing polymers with no film-forming ability but with great potential for this purpose, blending has been approached as a simple, time- and cost-effective strategy. Herein, blends of trityl-substituted triphenylamine (TTA)-based polyimides and a fluorinated polyimide (6F-PI) were involved to prepare dense membranes by drop-casting technique. The two blend components involved in variable amounts led to different film morphologies with a strong impact on most blends' properties and gas separation performance. According to optical microscopy, SEM, AFM, and FTIR investigations, the blend series containing hexafluoroisopropylidene (6F) groups in both polyimide components proved to be fully miscible at the molecular levels. When a single 6F-based component was integrated into the blend, the polymers proved to be compatible, but only partially miscible, with a two-phase structure, in which 6F-PI wrapped around the TTA-PI growth fibrillar domains. However, all blends displayed a single glass transition and FTIR bands which do not sum the ones of the polymer components, as well as a high thermal stability, close to that of 6F-PI. Regardless of their miscibility level, all blends behaved as classical polyimide films, with good mechanical properties and chemical resistance to corrosive media like acid vapors or basic solutions. The blend composition and diimide structure of TTA-PI little affected the dielectric behavior, unlike the gas separation performance that strongly depended on these characteristics. The higher amount of 6F groups in the miscible blends endowed the membranes with superior permeability and selectivity, allowing in some cases to surpass the trade-off rule. Generally, the gas permeability decreased with the increase of TTA-PI content, with some exceptions. The low intermolecular interfacial interactions promoted by TTA-PI were found to be beneficial in preserving a good selectivity of gas molecules with a small kinetic diameter (He, CO₂) though their permeability is lost. The gas permeability changes as a function of the blend composition and structure were mostly due to changes in the solubility coefficient and less from gas diffusion capability, at least for CO₂ and N₂.</div></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"205 ","pages":"Article 106081"},"PeriodicalIF":4.5,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of photocurable thiol-epoxy resins for the processing of vitrimers with vat photopolymerisation 3D printing","authors":"Szymon Gaca ,&nbsp;Kurt Dietliker ,&nbsp;Elisabeth Rossegger ,&nbsp;Sandra Schlögl","doi":"10.1016/j.reactfunctpolym.2024.106085","DOIUrl":"10.1016/j.reactfunctpolym.2024.106085","url":null,"abstract":"<div><div>Vat photopolymerisation 3D printing is a convenient approach to fabricating complex polymeric objects based on the localised photocuring of a liquid resin. Advancing from free-radical mediated curing mechanisms, the current study focuses on the vat photopolymerisation 3D printing of photopolymers formed by an ionic click reaction between thiol and epoxy monomers. In this process, selected epoxy monomers are mixed with a tetra-functional thiol crosslinker and a photobase generator, which releases 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) upon light exposure to initiate the anionic ring-opening reaction. FTIR, photo-DSC and rheology studies reveal a slow cure rate of the thiol-epoxy resins at room temperature, which is significantly accelerated by increasing the temperature to 50 °C during light irradiation. By optimising the resin composition, shelf life and viscosity, printing of objects via digital light processing 3D printing is enabled by using a vat heated to 50 °C. The printed thiol-epoxy networks contain ample -OH and ester moieties, which undergo thermo-activated bond exchange reactions. Here, the photochemically liberated DBN molecules act as catalysts to accelerate the transesterification reaction at elevated temperatures (150–180 °C). Rheological measurements demonstrate the efficient and Arrhenius-like behaviour of the networks' stress relaxation, giving rise to the dynamic nature of the printed photopolymers, which is further confirmed by reshaping experiments.</div></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"205 ","pages":"Article 106085"},"PeriodicalIF":4.5,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and characterization of nanocellulose-reinforced water-soluble cellulose acetate films","authors":"Hongrun Chen ,&nbsp;Gaoyuan Hou ,&nbsp;Korawit Chitbanyong ,&nbsp;Miyuki Takeuchi ,&nbsp;Izumi Shibata ,&nbsp;Akira Isogai","doi":"10.1016/j.reactfunctpolym.2024.106083","DOIUrl":"10.1016/j.reactfunctpolym.2024.106083","url":null,"abstract":"<div><div>A water-soluble cellulose acetate (CA) with a degree of acetyl substitution of 0.9 was dissolved in water and mixed with aqueous dispersions of reinforcing cellulose nanofibers (CNFs) at various mass ratios. CA/CNF composite films with CNF contents of 0 %–16 % were prepared by casting and drying the mixtures to improve the fundamental properties of the films. Aqueous dispersions of TEMPO-CNFs containing sodium carboxylate and protonated carboxy groups were separately prepared and used to produce CA composite films (TEMPO = 2,2,6,6-tetramethylpiperidine-1-oxyl radical). Highly transparent CA/TEMPO-CNF films with tensile strengths and Young's moduli more than twofold those of the 100 % CA film were obtained at a TEMPO-CNF content of 16 %. Transmission electron microscopy images of the film cross-sections showed that the TEMPO-CNFs were almost homogeneously and individually distributed in the CA/TEMPO-CNF-COOH composite films. The thermal expansion patterns of the 100 % CA films were characteristically wavy between 30 and 100 °C, and the thermal expansion ratios decreased as the TEMPO-CNF contents of the films increased. The obtained results indicate that CA/CNF mixtures can be used as water-based coatings and paints with favorable properties.</div></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"205 ","pages":"Article 106083"},"PeriodicalIF":4.5,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of antioxidant structure on bromobutyl rubber composites' processability and age resistance","authors":"Shuo Liu ,&nbsp;Xinxin Mao ,&nbsp;Qinglong Qu ,&nbsp;Fade Li ,&nbsp;Jianqing Mao ,&nbsp;Jiahui Chen ,&nbsp;Haiping Ma ,&nbsp;Hongzhen Wang","doi":"10.1016/j.reactfunctpolym.2024.106082","DOIUrl":"10.1016/j.reactfunctpolym.2024.106082","url":null,"abstract":"<div><div>Bromobutyl rubber has numerous applications in industries such as tires, sealing capsules, and aerospace, so enhancing its aging resistance is a critical issue. However, the addition of amine antioxidants to Bromobutyl rubber results in the occurrence of unique storage hardening and storage scorching phenomenon, which lead to the deterioration of the rubber's properties. To examine the impact of various types of amine antioxidants on the storage stability and aging resistance of Bromobutyl rubber, we conducted comparative experiments using five types of amine antioxidants and one phenolic antioxidant. The purpose was to investigate the effect of amine antioxidants on the storage stability and overall performance of Bromobutyl rubber. The results indicate that the inclusion of <em>p</em>-phenylenediamine antioxidants (4020, 4010NA) greatly facilitates the occurrence of storage hardening and storage scorching phenomenon in Bromobutyl rubber, leading to a deterioration in rubber performance. Therefore, it is advisable to refrain from using high-activity <em>p</em>-phenylenediamine antioxidants when working with Bromobutyl rubber.</div></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"205 ","pages":"Article 106082"},"PeriodicalIF":4.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and performance study of N-LAC/MoS2/PVDF ion exchange membrane in microbial desalination cells","authors":"Jianjun Wang ,&nbsp;Mengqi Wang ,&nbsp;Xu Ji ,&nbsp;Sixia Yang ,&nbsp;Ping Zhang ,&nbsp;Bianfeng Yang ,&nbsp;Shiyan Yang ,&nbsp;Youbo Dou ,&nbsp;Yonggui Tao","doi":"10.1016/j.reactfunctpolym.2024.106075","DOIUrl":"10.1016/j.reactfunctpolym.2024.106075","url":null,"abstract":"<div><div>Ion exchange membranes play a crucial role in the study of microbial desalination cells (MDC). This study introduces a novel N-LAC/MoS₂/PVDF ion exchange membrane prepared via chemical grafting, emphasizing its role in enhancing MDC efficiency. The research thoroughly assesses the membrane's microstructure, infrared spectroscopy, and water flux, revealing how the composite additives enhance hydrophilicity, alter contact angles, and improve pore structure. The incorporation of hydrophilic groups like hydroxyl, carboxyl, and carbonyl groups into the membrane significantly improves its hydrophilicity. The optimal performance is achieved with 1 wt% N-LAC/MoS₂, increasing porosity to 86.94 % (a 25.5 % increase from pure PVDF) and reducing the contact angle to 71.59° (a 14.12 % decrease from pure PVDF). It also achieves an 84.1 % desalination efficiency under set conditions. The membrane shows high removal efficiency for methylene blue (MB) and Pb²⁺, reaching up to 93–96 % for MB and 91–94 % for Pb²⁺ under different pH, concentration, temperature, and salinity conditions. Its reusability is also notably enhanced. This work presents a tailored composite material for MDCs, offering insights into its interaction mechanisms and performance contributions to the MDC system, marking a significant advancement in membrane-based desalination technology.</div></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"205 ","pages":"Article 106075"},"PeriodicalIF":4.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}