This site keeps growing as I run into more things worth building. There's no fixed release schedule, so entries land whenever a tool or guide is ready, roughly newest first below. Have a suggestion? Open an issue on GitHub.
๐งฑ Polyurethane tab in the Calculator
Two-step prepolymer formulation built around capping and chain extension: OH-number-based equivalent weights, NCO:OH capping ratio, theoretical %NCO with a measured-value override for the extension step, extender dosing by index, hard segment content, and a full suggested procedure from polyol drying through cure. Lives alongside ATRP/RAFT/ROMP/FRP in the Calculator, with saved recipes and share links.
๐งด Emulsion Polymerization tab in the Calculator
Micellar (Smith-Ewart) nucleation with SDS and KPS: predicted particle number and diameter from surfactant, initiator, and monomer charge, with a CMC check, solids content, and an advanced option to layer a RAFT or ATRP mediator on top for a controlled/living particle interior. Lives in the Calculator alongside the other techniques.
๐ ๏ธ Site polish: SEO, accessibility, and analytics
Search-friendly meta tags and structured data on every page, a custom 404 page, aria-labels on every icon-only button in the structure editor, a sitemap, and privacy-respecting analytics to see which tools people actually use.
๐ค Automated polymer discovery pipeline
A scheduled job checks a watchlist of common monomers against PubChem, derives the repeat unit structure for the straightforward cases (vinyl, acrylate, methacrylate, diene, and some ring-opening chemistries), and opens a pull request for review. Nothing reaches the live database without a manual check first.
๐ฎ Build a Polymer Chain
A small maze game for practicing skeletal formula conventions: collect the right monomer beads and dodge inhibitors and chain transfer agents before they terminate your chain.
๐ Polymer Search
Look up a common polymer by name, or draw its repeat unit in a freeform structure editor (with ring tools, wedge/hash bonds, and formal charges) and search a curated reference library by structure. Explore mode adds tag browsing and a photo-upload search that reads polymer names or CAS numbers straight off a label or textbook page.
๐ GPC Peak Interpretation, expanded
A troubleshooting quick-reference for common chromatogram artifacts, a multi-detector section, an interactive flow-rate drift calibration demo, and an image-upload trace analyzer for reading Mn/Mw off a real chromatogram photo.
โ๏ธ Recipe Scaling
Scale any polymerization recipe up or down by a factor, or between batch sizes, while keeping every component's ratio exact.
๐ก๏ธ Tg Predictor
Estimate a random copolymer or miscible blend's glass transition temperature from its components using the Fox equation.
๐ GPC Calibration Converter
Convert a polystyrene-equivalent molecular weight from a GPC report into a true molecular weight for the actual polymer, using Mark-Houwink parameters.
๐งฌ Copolymer Composition
Predict instantaneous copolymer composition from feed ratio and reactivity ratios with the Mayo-Lewis equation, including a composition diagram and azeotrope detection.
๐ Glossary, mobile pass, and recipe tools
A glossary of common polymer chemistry terms, a full mobile responsiveness pass, an interactive kinetics plot on the conversion monitoring guide, a print/export stylesheet for recipes, save/reload recipe presets, dispersity (ฤ) guidance on results, and a Stock Solutions tab on the calculator.
๐ Light/dark theme
The calculator and every guide page now follow a light or dark theme, with a toggle in the header.