| Customization: | Available |
|---|---|
| CAS No.: | 68648-82-8 |
| Formula: | C4h5cl3 |
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Chlorinated polyvinyl chloride (CPVC) is a thermoplastic produced by chlorination of polyvinyl chloride (PVC) resin. CPVC is significantly more flexible than PVC, and can also withstand higher temperatures. Common applications include hot and cold water supply systems, as well as industrial fluid transport. Similar to PVC, CPVC is recognized as a safe material for potable water distribution and usage.
| Property | Unit | Typical Value | Notes |
|---|---|---|---|
| Appearance | - | White to pale yellow powder/granules | Free-flowing, non-agglomerating |
| Bulk Density | g/cm³ | 0.50-0.65 | Depends on particle size distribution |
| True Density | g/cm³ | 1.50-1.58 | Measured by helium pycnometer |
| Chlorine Content | wt% | 63-69 | Higher than standard PVC (56.7%) |
| Moisture Content | % | ≤0.3 | After drying at 80°C for 2 hours |
| Volatile Matter | % | ≤0.5 | Includes residual VCM and solvents |
| Particle Size | mesh | 80-120 | Customizable for processing needs |
Thermal & Rheological Properties
| Vicat Softening Temperature | °C | 100-125 | ASTM D1525 (10N load) |
| Melt Temperature Range | °C | 190-230 | Processing window |
| Thermal Stability | min | ≥30 | At 200°C under nitrogen |
| Melt Flow Rate (MFR) | g/10min| 2-10 | 200°C/5kg, ASTM D1238 |
Combustion Characteristics
| Limiting Oxygen Index (LOI) | % | ≥60 | ASTM D2863 |
Key Notes:
1. All values represent unmodified base resin properties
2. Typical values may vary ±5% depending on:
·Chlorination degree (63-69% Cl)
·Molecular weight distribution
·Production process (suspension/water-phase chlorination)
3. Processing conditions (shear rate, temperature profile) significantly influence final performance
The material's unique combination of properties - including its thermal endurance, chemical inertness, and mechanical robustness - makes CPVC compounds an ideal engineering solution for applications requiring reliable performance under thermally and chemically challenging conditions.
1. Superior thermal stability (continuous service temperature up to 93°C/200°F)
2. Outstanding pressure resistance for demanding fluid transport systems
3. Exceptional corrosion resistance against acids, alkalis and salts
4. Built-in flame retardancy with self-extinguishing properties
5. UV stability for outdoor applications
6. Long-term durability with minimal degradation
Chlorinated Polyvinyl Chloride (CPVC) is an advanced engineering thermoplastic obtained through chlorination modification of PVC resin. This high-performance material appears as white or light yellow, odorless, non-toxic free-flowing granules or powder with excellent organoleptic properties.
The chlorination process induces three key molecular-level improvements:
1. Increased irregularity in molecular chain arrangement
2. Enhanced polarity
3. Improved solubility and chemical stability
These structural modifications impart superior material characteristics:
1.Heat resistance: Vicat softening temperature elevated from 72-82°C to 90-125°C
2.Thermal capability: Maximum service temperature of 110°C with long-term stability at 95°C
3.Chemical resistance: Exceptional stability against acids, alkalis, salts and oxidizers
4.Mechanical enhancement: Improved heat deformation temperature and overall strength
5.Chlorine content: Increased from 56.7% to 63-69% for enhanced flame retardancy
CPVC represents a breakthrough engineering material with extensive application potential across multiple industries.
While CPVC is derived from PVC and shares some fundamental properties, it possesses distinct processing characteristics that demand special attention:
Extrusion Processing Requirements
1. Melting Temperature Range: 400-450°F (204-232°C)
2. Die Specifications:
·Must use chrome-plated or stainless steel dies;
·Requires streamlined die design to ensure stable long-term operation;
·Flat dies are unsuitable for sustained production.
3. Size Control: Vacuum sizing technology is strongly recommended for precise pipe/profile dimensional control
4. Equipment Power: Minimum 40HP screw drive system required
5. Screw Design: Multiple screw configurations available for optimized processing of formulated compounds
Injection Molding Guidelines
1. Screw Type:Standard fittings:
·Low-compression screw with appropriate L/D ratio;
·Pipe fittings:Sharp-plasticizing screw design;
·Low-viscosity/high-output materials: Modified screw without sliding check ring (ball check screws prohibited).
2. Mold Construction: Stainless steel preferred; minimum requirement of chrome/nickel-plated surfaces
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