# 🧪 High-MW linear polymer in water, frequency sweep (community)

`dataset id: caggioni_linear_polymer_frequency_sweep`

Small-amplitude frequency sweep of a high-molecular-weight linear polymer in aqueous solution: 31 points, angular frequency 100 down to 0.1 rad/s at strain amplitude 0.5 %, 25 C (inside the linear viscoelastic regime located by the companion amplitude sweep). The complex viscosity feeds the Cox-Merz superposition against the steady-shear flow curve. Parent TRIOS file a_remake_dhr2.json (step 'Frequency sweep - 3'). Originally measured for the rheofit Carreau walkthrough.

## 📈 Data

![Data for caggioni_linear_polymer_frequency_sweep](_plots/caggioni_linear_polymer_frequency_sweep.png)

## 🗂️ Metadata

| Field | Value |
| --- | --- |
| Material | High-molecular-weight linear polymer in water |
| Material kind | polymer solution |
| Source | Unpublished (community contribution) |
| DOI | — |
| Figure | — |
| Measurement type | frequency_sweep |
| Geometry | not reported |
| Temperature | 25 °C |
| Protocol | Frequency sweep 100 -> 0.1 rad/s (high to low) at strain amplitude 0.5 %, 31 points. |
| Provenance | community, digitized: no |

## 🧫 Samples

| Sample id | Label |
| --- | --- |
| linear_polymer | High-MW linear polymer, aqueous solution |

## 📋 Data columns

| Role | Column | Units |
| --- | --- | --- |
| `x` | `omega_rad/s` | rad/s |
| `y` | `Gp_Pa` | Pa |
| `sample` | `sample_id` | — |

## 🏷️ Tags

`polymer solution` `oscillatory` `frequency-sweep` `cox-merz`