Brief description：GPC/SEC is the standard method for measuring the molecular weight and distribution of polymers. Dehui represents Waters and Agilent GPC systems, and by using multiple detector coupling technology, we can get absolute molecular weight, distribution, and branching parameters. It's suitable for characterizing the molecular weight of materials like acrylic pressure-sensitive adhesives, SIS/SBS hot melt adhesives, and polyurethane prepolymers.
Industry Applications：Determining the molecular weight and molecular weight distribution (Mw/Mn/PDI) of acrylic pressure-sensitive adhesive resins; characterizing the molecular weight of SIS/SBS hot-melt pressure-sensitive adhesive elastomers and monitoring batch consistency; tracking the molecular weight growth process of polyurethane adhesive prepolymers; analyzing the relationship between molecular weight distribution and melt index of EVA hot-melt adhesives; assessing molecular weight changes in adhesives before and after aging, etc.
Detailed
Gel permeation chromatography (GPC/SEC) is the standard method for determining the molecular weight and molecular weight distribution of polymer materials. It's crucial for the adhesive industry—as the resin's molecular weight directly affects its adhesion, cohesion, and coating performance. The Waters and Agilent GPC systems distributed by Dehui, combined with multi-detector setups (RI/UV/LS/Viscometer), can simultaneously provide the polymer’s absolute molecular weight, molecular weight distribution, branching degree, and Mark-Houwink parameters. They are especially suitable for characterizing new materials like acrylic pressure-sensitive adhesive resins, SIS/SBS hot-melt adhesive elastomers, and polyurethane prepolymers, providing key parameters for formulation development and batch quality control.
Industry Applications:
- Determining the molecular weight and distribution (Mw/Mn/PDI) of acrylic pressure-sensitive adhesive resins
- Molecular weight characterization and batch consistency monitoring of SIS/SBS hot-melt pressure-sensitive adhesive elastomers
- Tracking molecular weight growth of polyurethane adhesive prepolymers
- Correlation analysis between molecular weight distribution and melt index of EVA hot-melt adhesives
- Evaluating molecular weight changes in adhesives before and after aging (assessing chain scission/crosslinking)
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