polymer-characterization

# Polymer Characterization Skill ## Purpose The Polymer Characterization skill provides comprehensive analysis capabilities for polymeric materials, enabling systematic evaluation of molecular weight, thermal behavior, crystallinity, mechanical properties, and chemical structure essential for polymer science and engineering applications. ## Capabilities - Molecular weight distribution analysis (GPC/SEC) - Thermal transition identification (Tg, Tm, Tc) - Crystallinity determination (DSC, XRD) - Rheological property analysis (viscosity, viscoelasticity) - Chemical structure verification (FTIR, NMR) - Degradation pathway analysis - Additive and filler content determination - Polymer blend compatibility assessment ## Usage Guidelines ### Molecular Weight Analysis (GPC/SEC) 1. **Sample Preparation** - Dissolve in appropriate solvent (THF, DMF, chloroform) - Filter through 0.45 um membrane - Prepare at 1-5 mg/mL concentration 2. **Calibration** - Use narrow molecular weight standards (PS, PMMA, PEO) - Apply universal calibration with Mark-Houwink parameters - Consider absolute methods (light scattering, viscometry) 3. **Data Analysis** - Calculate Mn, Mw, Mz averages - Determine polydispersity index (PDI = Mw/Mn) - Identify multimodal distributions ### Thermal Analysis for Polymers 1. **Glass Transition (Tg)** - Use DSC at 10-20 K/min heating rate - Report midpoint, onset, or inflection consistently - Note thermal history effects 2. *...