# `03_ExperimentalData`

`03_ExperimentalData` contains curated experimental JSON records used for
parameter fitting, validation, and plotting.

## Prerequisites

No setup is required to inspect the JSON files directly. To load them through
the repository helpers, install the environment from
[`../README.md`](../README.md).

## Data Types

- `EXP_PUR_*`: pure-component property data
- `EXP_LLE_*`: liquid-liquid-equilibrium tie-line data
- `EXP_SOL_*`: solvent ternary coexistence data and PNIPAAm-water solution
  branch data
- `EXP_DOS_*`: degree-of-swelling data for gel systems
- `EXP_POLY_DENS_*`: polymer density data

> The required experimental vapor-pressure and liquid-density data are not open source and therefore cannot be published in this repository.
>
> To run the corresponding scripts, provide equivalent property data from a licensed source such as DIPPR or another suitable thermophysical-property database.

## Current Scope

The directory includes:

- solvent-system data for water, n-butanol, butyl acetate, and acetic acid
- PNIPAAm-water solution data across multiple molar masses
- PNIPAAm swelling data in water-rich and mixed-solvent systems
- polymer density data used by the PNIPAAm-water comparison scripts

## Conventions

Records store component names, source citations, temperature arrays, and mole-
or mass-fraction arrays in JSON so they can be reviewed directly. Filename
prefixes indicate the broad record type, while the component fields inside the
JSON are the source of truth for loaders and plotting scripts.

## Notes

Do not reorder component arrays or rename component fields without updating the
corresponding `compN_name` values. Several section scripts assume the component
order encoded in each record.
