Macromolecular Symposia最新文献

{"title":"Structural, Optical, and Dielectric Property Analysis of Co0.7Zn0.3Cr2O4 Chromite System","authors":"Tarun Garg,&nbsp;Rupali Joshi,&nbsp;Lakhan Kumar Parmar,&nbsp;Abbas Ali Koser,&nbsp;Ravi Kant Choubey,&nbsp;Anand Yadav","doi":"10.1002/masy.202400124","DOIUrl":"https://doi.org/10.1002/masy.202400124","url":null,"abstract":"<p>The present investigation mainly focuses on the process of characterization and synthesis of Zn-doped CoCr₂O₄ as Co_0.7Zn_0.3Cr₂O₄. The solid state reaction route method is used to synthesize this material. XRD data analysis has revealed that a single phased sample is prepared that acquired cubic structure (Fd3m). Raman spectrum of the Co_0.7Zn_0.3Cr₂O₄ chromite sample reveals five distinct narrow bands at 190 (F_2g), 435 (E_g), 505 (F_2g(2)), 535 (F_2g(3)), and 670 (A_1g). The energy bandgap of the synthesized Co_0.7Zn_0.3Cr₂O₄ chromite sample is determined to be 3.14 eV using UV–vis spectral analysis. Dielectric permittivity is witnessed to be high with low loss values. Loss characteristics further reveals resonance in the sample. In addition, the study emphasized on the conductivity nature of the sample also.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Carbon Dots on Ionic Conductivity of Isothiocynate-Based Nematic Liquid Crystal","authors":"Srashti Tomar,&nbsp;Priscilla P,&nbsp;Prabhat Singh Raghav,&nbsp;Arvind Kumar Gathania,&nbsp;Sandeep Kumar,&nbsp;Ajay Kumar,&nbsp;Jai Prakash,&nbsp;Supreet Kaur,&nbsp;Gautam Singh","doi":"10.1002/masy.202400184","DOIUrl":"https://doi.org/10.1002/masy.202400184","url":null,"abstract":"<p>The paper report the impact of carbon dots (CDs, diameter ∼2-3 nm) on the ionic conductivity of homogeneously aligned nematic liquid crystal (NLC), namely, 4-(trans-4ʹ-<i>n</i>-hexylcyclohexyl) isothiocyanatobenzoate (6CHBT), using dielectric spectroscopy. To investigate the effect of frequency, temperature, and dopant (CDs) concentration (0.05, 0.1, 0.2, and 0.5 wt%) on the ionic conductivity of 6CHBT, the loss tangent (tan <i>δ</i>) is measured. For instance, at room temperature, the frequency dependent tan <i>δ</i> clearly shows the significant shift in ionic relaxation peak of 6CHBT toward a higher frequency with increase in dopant concentration. The change in the ionic conductivity with frequency is also observed in all composites. The temperature-dependent studies in temperature range of 28–40 °C clearly show that conductivity increases monotonically with temperature and the change in magnitude is largest for the 0.5 wt% composite. This is attributed to change of homogeneous to homeotropic alignment of NLC due to dopant CDs. To understand more about the significant change in the ionic conductivity, the thermal activation energy is calculated for all composites using an Arrhenius plot. The results are believed to further shed more light on present understanding of dynamics of ionic conduction in pure 6CHBT and its nanocomposites and would be useful for the development of advanced soft composite materials with tunable dielectric properties.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Raman Spectroscopy and Structural Analysis of Polyphenylene Sulfide (PPS)","authors":"Anupama Gour,&nbsp;Malyaj Das,&nbsp;Ravi Kant Choubey","doi":"10.1002/masy.70002","DOIUrl":"https://doi.org/10.1002/masy.70002","url":null,"abstract":"<p>Polyphenylene sulfide (PPS) emerges as a novel and promising material in the field of optical materials, owing to its distinctive crystal structure. This structure, characterized by phenyl rings arranged at angles ranging from +45° to −45° along the [100] plane, with two chains in the orthorhombic unit cell, sets PPS apart. Our research delves into the unique sensitivity of the Raman line at 1079.83 cm⁻¹ to the alignment of polymer chains within PPS. This sensitivity serves as a powerful tool, enabling us to unravel the structural complexities of PPS and illuminate the dynamics governing its optical behavior. Our study adopts a synergistic approach, combining the precision of Raman spectroscopy with the broader perspective offered by nonlinear optical (NLO) evaluations. This integration aims to deepen our understanding of PPS, behavior, particularly in relation to its optical properties. Furthermore, it seeks to underscore the untapped potential of PPS in the field of nonlinear optics, thereby paving the way for its application in advanced optical technologies.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PTFE and K-12 Polymer and Ceramic Composite for RF Propagation","authors":"Surendra Kumar,&nbsp;Pallavi Gupta,&nbsp;Manisha Rajauriya","doi":"10.1002/masy.70001","DOIUrl":"https://doi.org/10.1002/masy.70001","url":null,"abstract":"<p>K-12 and polytetrafluoroethylene (Teflon) polymer–ceramic composite has been prepared by powder processing method for application of the RF &amp; microwave devices. The fabrication of the polymer and ceramic composite is studied and experimented in this paper. The K-12 ceramic is used as a filler material and Teflon has been used as a matrix of the composite system. The dielectric properties of the polymer–ceramic composite is in good agreement with the theoretical approaches. The dielectric constant and dielectric loss of the composite is found to be 5 and 0.003, respectively. The dielectric constant of the composite is higher than the individual materials. The relative permittivity and dielectric loss increased with an increase in PTFE content. This will help to miniaturize the RF components and microwave devices for microwave applications.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-Friendly Synthesis and Application of ZnO Nanoparticles for Azo Dye Degradation","authors":"Munisha Mahajan,&nbsp;Sanjeev Kumar,&nbsp;Harpreet Kaur,&nbsp;Sanjeev Kumar,&nbsp;Jyoti Gaur,&nbsp; Supreet,&nbsp;Gurjinder Singh,&nbsp;Manjot Kaur,&nbsp;P Priscilla,&nbsp;Gautam Singh","doi":"10.1002/masy.202400238","DOIUrl":"https://doi.org/10.1002/masy.202400238","url":null,"abstract":"<p>This research challenges the pressing environmental challenges of water lack and textile industry pollution, specifically focusing on the issue of azo dye contamination. Given the limitations of conventional wastewater treatment methods, this study investigates a novel and sustainable strategy: the synthesis of zinc oxide nanoparticles (ZnO NPs) using <i>Foeniculum vulgare</i> (<i>FV</i>) extract for the degradation of azo dyes. To characterize the synthesized ZnO NPs, a range of techniques are employed. X-ray diffraction (XRD) analysis confirmed the formation of pure ZnO NPs with an average crystallite size of approximately 22.4 nm. UV–vis spectroscopy is used to ascertain the band gap energy of the NPs, determined to be 3.12 eV, which is essential for their photocatalytic activity in dye degradation. Fourier-transform infrared spectroscopy (FT-IR) identified functional groups in both the <i>FV</i> extract and the ZnO NPs, indicating the successful integration of biomolecules from the extract into the ZnO NPs, potentially enhancing their photocatalytic properties. Field emission scanning electron microscopy (FE-SEM) and energy-dispersive X-ray spectroscopy (EDX) provided insights into the physical morphology and elemental composition of the NPs, with elemental mapping revealing the distribution of zinc and oxygen. High-resolution transmission electron microscopy (HR-TEM) confirmed the multi-structured formation of ZnO. The catalytic efficiency is assessed by testing the degradation of commercial methyl orange. At a concentration of 120 mg L⁻¹ and a ZnO dosage of 250 mg L⁻¹, the <i>FV:ZnO</i> catalyst demonstrated a removal efficiency of approximately 89.13%. The photodegradation process adhered to a pseudo-first-order kinetics model.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Radiation on Polymeric Binder for Development of Radiation Resistant Coating","authors":"Nikhita Khurana,&nbsp;Sunita Rattan,&nbsp;Pinklesh Arora,&nbsp;Avinash Pente","doi":"10.1002/masy.70013","DOIUrl":"https://doi.org/10.1002/masy.70013","url":null,"abstract":"<p>The application of radiation provides numerous benefits to people and society. It is a natural consequence of such applications that waste is generated. Radioactive wastes are generated during various operations of the nuclear fuel cycle. The waste remains radioactive for a few hours or several months or even hundreds of years depending upon the nature of radioisotopes present in the waste. The radioactive waste needs to be managed in a safe and secure manner. The primary objective is to isolate the radioactive waste from people and the environment for the period up to waste remains hazardous.</p><p>The safe disposal of radioactive waste is a complex issue, not only because of the nature of the waste, but also because of the stringent structure for dealing with radioactive waste. The radioactive waste must be stored in environmentally sound containers to effectively isolate the waste from the environment. Most of the research done to date involves focused on the radioactive waste storage containers. For storage of low-level radioactive waste, metal containers are used; but due to corrosion they are not suitable for long term duration.</p><p>A barrier coating has a great importance to be applied on metal surface to avoid its interaction with surroundings. These coatings have to be designed using stable polymeric binder that can sustain the radioactive environment. The polymeric binders used in these coatings can become degraded over time when subjected to radiation, compromising their protective abilities. In the study, polymers such as PU, HDPE, epoxy, EPDM are exposed to gamma radiation from 300 kGy to 1200 kGy and the effects are studied by checking the physical properties (water absorption and density), mechanical properties (Tensile strength &amp; elongation, Hardness, Gel content, TGA) and surface properties (SEM) to differentiate the best possible binder for the corrosion and radiation resistant coating. It has been observed that EPDM is the most suitable polymeric binder to develop coating formulations for radioactive waste storage containers. Effect of radiation on surface of EPDM is not observed, whereas surface deterioration and cracks are seen in-case of epoxy, TPU and HDPE. The flexibility of EPDM retained well even after exposure. The physical and mechanical properties checked, well supports the choice of choosing EPDM as a polymer for radiation barrier coating.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Title Page 414-2","authors":"","doi":"10.1002/masy.70016","DOIUrl":"https://doi.org/10.1002/masy.70016","url":null,"abstract":"","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/masy.70016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of NVP, HEMA, and Bis-GMA Grafting on Thermal and Physical Properties of Poly(AA-co-IA)","authors":"Mayuri Gupta,&nbsp;A. K. Tyagi,&nbsp;Manoj Raula","doi":"10.1002/masy.70000","DOIUrl":"https://doi.org/10.1002/masy.70000","url":null,"abstract":"<p>In this work, we report the grafting of monomers, such as bisphenol-A-glycidyl methacrylate (bis-GMA), <i>N</i>-vinylpyrrolidone (NVP), and 2-hydroxy ethyl methacrylate (HEMA), on the copolymer of acrylic and itaconic acid [poly (AA-co-IA)] using simple condensation polymerization technique. The resultant graft copolymers are characterized by FTIR, TGA-DTG, DSC, and SEM analysis. All these studies confirm the formation of grafted copolymers. We have varied the monomer concentration ratios and catalyst concentrations to study the variations in degree of grafting. All the synthesized graft copolymers are then mixed with HEMA and camphorquinone to make an LED light-curable dental polymer. Thermal and physical properties, such as the strength and hardness of the cured grafted copolymers, are studied in detail and found that the developed composite is 35% stronger in terms of compressive strength as compared to commercial samples.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Normalization, Rolling, Aging, Quenching, and Tempering Study on Micro-Alloyed Steel","authors":"Nidhi Bansal Garg,&nbsp;Mohit Bansal,&nbsp;Pradeepta Kumar Sarangi,&nbsp;Har Mohan Singh,&nbsp;M. Z. A. Yahya,&nbsp;Pramod K Singh,&nbsp;S.N.F. Yusuf,&nbsp;Ashok Kumar Sahoo","doi":"10.1002/masy.70014","DOIUrl":"https://doi.org/10.1002/masy.70014","url":null,"abstract":"<p>A noticeable increase in the consumption of high-strength low-alloy (HSLA) steels within the realm of structural applications can be seen in last few decades. Various industrial applications, notably in pressure vessels and line-pipe systems across multiple sectors, including the oil industry are using HSLA. In oil industry the use or potential of API X-65 for line-pipe impacted in a lot in industry. Normalization, rolling, aging, quenching and tempering (QT) are parts of main process during manufacturing of HSLA steels. Limited quantity of components (alloying) are used to strengthen the low carbon steels. Also, precipitation strengthening is increased with the presence of niobium (Nb), vanadium (V), and titanium (Ti). Major impact on the basic properties like hardness, strengthening of HSLA steels can be seen during the evaluation of HSLA steel can be seen after the thermo mechanical treatments (TMT). In this work, tensile specimens are prepared after applying rolling, aging and cold work and better mechanical properties (MP) has been achieved which are more beneficial for the use in industry.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integration of Nanotechnology with Quinazolines in the Medical Field","authors":"Jenifer Robinson,&nbsp;Chandra Mohan,&nbsp;Shah Alam Khan,&nbsp;Sunil Kumar","doi":"10.1002/masy.202400182","DOIUrl":"https://doi.org/10.1002/masy.202400182","url":null,"abstract":"<p>Quinazoline, a magical and attractive compound, has a wide range of biological and pharmaceutical applications in the form of derivative compounds. The remarkable biological properties such as antibacterial, antifungal, anti-inflammatory, antimalarial, antiviral, and other unique features of quinazolines are mainly responsible for its novel structures, materials, and devices in medicinal chemistry and nanotechnology. This article describes the role of quinazolines in nanotechnology, their advantages and disadvantages, medical case studies, and future developments. In DNA nanotechnology, one of the quinazoline derivatives acts as a substitute for thymine in nucleic acid complexes. Drug dexrazoxane is a quinazoline derivative widely used as a cardio-protective agent in nanomechanics. The syntheses of biologically active quinazoline derivatives using nanocatalysts have shown efficient chemical transformations. Quinazolines, being antifungal agents, are widely used in humans and plants as nano-engineered medicines with low toxicity. Nowadays, new quinazoline-based compounds are being synthesized as possible drugs of anticancer effectiveness against bladder cancer, breast cancer, head and neck cancer, lung cancer, and many more anticancer therapies. Controlled release of quinazolines towards antibacterial action can be achieved by changing the pH &lt; 7 or pH &gt; 7 and with the solid support of using metal clusters and appropriate organic ligands.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}