Discover polymers最新文献

筛选

英文中文

The impact of dynamic bonding associations on the rheology of amine containing polyolefins. 动态键合对含聚烯烃胺流变学的影响。

Discover polymers Pub Date : 2026-01-01 Epub Date: 2026-02-27 DOI: 10.1007/s44347-026-00041-z

Ziyue Zhang, Nafiseh Moradinik, Amir Malmir, Saeed Ataie, Elmira Mohammadi, Laurel L Schafer, Savvas G Hatzikiriakos, Benjamin M Yavitt

{"title":"The impact of dynamic bonding associations on the rheology of amine containing polyolefins.","authors":"Ziyue Zhang, Nafiseh Moradinik, Amir Malmir, Saeed Ataie, Elmira Mohammadi, Laurel L Schafer, Savvas G Hatzikiriakos, Benjamin M Yavitt","doi":"10.1007/s44347-026-00041-z","DOIUrl":"10.1007/s44347-026-00041-z","url":null,"abstract":"Polyolefins are utilized in a wide array of applications due to their desirable and predictable properties. The incorporation of polar functional groups into the nonpolar backbone imparts an opportunity to further tune the properties and broaden the application space. Among the library of H-bonding chemistries that have been implemented via post-polymerization modifications, amines are of particular interest due to their challenging syntheses. The discovery of a two-step catalytic combination of hydroaminoalkylation and ring-opening metathesis polymerization (ROMP) has opened access to a new class of amine containing polyolefins, transforming simple starting materials into polar-functionalized polymers with complete atom economy. New rheological properties emerge due to the dynamic associative interactions, including H-bonding, [Formula: see text] stacking, and aggregate clustering, which are highly tunable based on the molecular design. The amine containing polyolefins also demonstrate autonomous self-healing and adhesion to low surface energy substrates, with particular interest in advanced adhesive systems. This review article details the recent progress in the molecular design of amine containing polyolefins, and the diversity of linear, non-linear, and extensional rheological behaviors. A discussion into remaining challenges in our understanding of the complex microstructure of the amine containing polyolefins and future pathways to designer materials from simple starting feedstocks is also presented.","PeriodicalId":520844,"journal":{"name":"Discover polymers","volume":"3 1","pages":"6"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12948856/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147329152","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}

引用次数: 0

Fabrication techniques for thin-walled silicone ocular implants using parylene-C coated 3D-printed molds. 使用聚苯乙烯- c涂层3d打印模具的薄壁硅胶眼植入物制造技术。

Discover polymers Pub Date : 2026-01-01 Epub Date: 2026-09-11 DOI: 10.1007/s44347-026-00063-7

Hyeonji Kim, Wen Hong, Sajjad Abdollahramezani, Daanyal Raja, Roger Wise, Ian Coates, Joseph M DeSimone, Charles DeBoer

{"title":"Fabrication techniques for thin-walled silicone ocular implants using parylene-C coated 3D-printed molds.","authors":"Hyeonji Kim, Wen Hong, Sajjad Abdollahramezani, Daanyal Raja, Roger Wise, Ian Coates, Joseph M DeSimone, Charles DeBoer","doi":"10.1007/s44347-026-00063-7","DOIUrl":"10.1007/s44347-026-00063-7","url":null,"abstract":"Silicone drug delivery implants are widely used, but their fabrication often relies on non‑standardized, empirically tuned protocols that limit reproducibility and transfer across labs. Here, we present a reproducible and generalizable fabrication workflow that brings together design rules, process settings, and validation for rapid fabrication of complex thin-walled biocompatible silicone implants. We outline mold design choices, including vents and micro refill-valve/filter placement, and post‑processing to make smooth inner surfaces, and we compare molds using an applied release agent (mold‑release chemical) versus molds coated with a parylene‑C barrier. Contact angle, Fourier transform infrared spectroscopy (FT-IR), and residue analyses show that parylene‑C prevents cure inhibition and enables clean demolding. We then link spin‑coating variables to membrane thickness and use rheology to guide material selection for pattern fidelity. We also correlate the curing time with network formation and extractable content. Device-level cross-sectional analyses and cytocompatibility assays are also conducted, with the assays indicating excellent compatibility with cells. Taken together, this work provides practical, transferable practice guidance and a reference workflow that other laboratories can adopt to make consistent silicone drug delivery implants and move the field toward standardization.Supplementary information: The online version contains supplementary material available at https://doi.org/10.1007/s44347-026-00063-7.","PeriodicalId":520844,"journal":{"name":"Discover polymers","volume":"3 1","pages":"24"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13569541/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148957636","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}

引用次数: 0

Development of a co-axial tri-extruder for low-melting point metals and UV-curable resins. 低熔点金属和光固化树脂共轴三挤出机的研制。

Discover polymers Pub Date : 2025-01-01 Epub Date: 2025-05-19 DOI: 10.1007/s44347-025-00021-9

Rawan Elsersawy, Mohammad Abu Hasan Khondoker

{"title":"Development of a co-axial tri-extruder for low-melting point metals and UV-curable resins.","authors":"Rawan Elsersawy, Mohammad Abu Hasan Khondoker","doi":"10.1007/s44347-025-00021-9","DOIUrl":"10.1007/s44347-025-00021-9","url":null,"abstract":"The need for flexible and stretchable electronics has recently gained high focus. Many fields, such as medicine, textiles, and aerospace, require conductive elements that can be mounted or sewed to the part. This means that this conductive element must have high flexibility and resistance to deformation. This research presents a novel fabrication technique of flexible electronics using coaxial extrusion methods for applications such as wearables, biosensors, and soft robotics. Another aspect of the study is the combination of eutectic gallium-indium, Acrylated Aliphatic Urethane Elastomer Resin, and Field's metal to develop flexible and multi-functional electronic devices. This work used comprehensive material properties, such as their flowability, UV curability, and flexibility, and interactions to analyze the rheological behaviors of these materials under different extrusion conditions. These materials were precisely and simultaneously deposited onto flexible substrates using a custom-designed coaxial extrusion system, while using G-code for controlling the extrusion parameters. The findings verify the feasibility of this approach in the fabrication of functional flexible conductive wires. This coaxial extrusion process has proven to be a promising technique owing to its versatility and scalability for rapid prototyping and large-scale production, hence offering enormous advancement in flexible electronics.Supplementary information: The online version contains supplementary material available at 10.1007/s44347-025-00021-9.","PeriodicalId":520844,"journal":{"name":"Discover polymers","volume":"2 1","pages":"9"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12101092/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144145238","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}

引用次数: 0