GFRP / GFK (Glass Fiber Reinforced Epoxy) vs PVC-U (Rigid PVC): 0% composition overlap. Significantly different materials serving different application areas.
GFRP / GFK (Glass Fiber Reinforced Epoxy) vs PVC-U (Rigid PVC)
Side-by-side chemical composition and mechanical property comparison.
Overview
GFRP / GFK (Glass Fiber Reinforced Epoxy)
Glass fiber reinforced epoxy composite — the cost-effective structural composite for industrial, marine and construction applications. E-glass fiber in epoxy matrix. Unidirectional: UTS ~1000 MPa, E ~40 GPa. Quasi-isotropic layup: UTS ~300 MPa, E ~18 GPa. Density 1.8–2.1 g/cm³. Electrically insulating (unlike CFRP). Used for boat hulls, wind turbine blades, chemical tanks/pipes, architectural panels, ladders, gratings, automotive body panels and electrical insulation structures.
PVC-U (Rigid PVC)
Unplasticized Polyvinyl Chloride — the second-most produced plastic globally. Hard, rigid, self-extinguishing (LOI 45%), excellent chemical resistance to acids/bases/salts, and very low cost. Key limitation: max service temp only 60°C. Developed in 1930s Germany. Used for water/sewage pipes, window profiles, electrical conduit, cladding, and chemical tanks/fittings. NOT the flexible PVC used in cables — that is PVC-P (plasticized).
| GFRP / GFK (Glass Fiber Reinforced Epoxy) | PVC-U (Rigid PVC) | |
|---|---|---|
| Material Number | — | — |
| Category | Polymers | Polymers |
| Standard | ASTM D3039 | ISO 10350 |
Chemical composition (wt%) — Pro
| Element | GFRP / GFK (Glass Fiber Reinforced Epoxy) | PVC-U (Rigid PVC) | Overlap |
|---|---|---|---|
| Epoxy Resin Matrix | 30–45% | — | — |
| Glass Fiber Reinforcement | 55–70% | — | — |
| Base Polymer (Polyvinyl Chloride) | — | 95–99.9% | — |
Mechanical properties — Pro
| Property | GFRP / GFK (Glass Fiber Reinforced Epoxy) | PVC-U (Rigid PVC) | Unit |
|---|---|---|---|
| Tensile Strength | 900–1100 | — | MPa |
| Tensile Modulus | 38–45 | — | GPa |
| Density | 1.8–2.1 | — | g/cm³ |
| Fiber Volume Fraction | |||
| Glass Transition Temp (Tg) | |||
| Water Absorption (24h) | |||
| Tensile Strength | |||
| Yield Strength | |||
| Elongation | |||
| Elastic Modulus | |||
| Density | |||
| Continuous Use Temp | |||
| hardness_shore_d | |||
| Water Absorption (24h) |
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GFRP / GFK (Glass Fiber Reinforced Epoxy) and PVC-U (Rigid PVC) have significantly different compositions (0% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is GFRP / GFK (Glass Fiber Reinforced Epoxy) the same as PVC-U (Rigid PVC)?
GFRP / GFK (Glass Fiber Reinforced Epoxy) and PVC-U (Rigid PVC) have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace GFRP / GFK (Glass Fiber Reinforced Epoxy) with PVC-U (Rigid PVC)?
Generally not recommended. The compositions differ significantly (0% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between GFRP / GFK (Glass Fiber Reinforced Epoxy) and PVC-U (Rigid PVC)?
The main differences are in the following elements: overall alloying content. GFRP / GFK (Glass Fiber Reinforced Epoxy) is a Polymers grade, while PVC-U (Rigid PVC) is a Polymers grade.
Related Comparisons
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.