| Abbreviation | Definition |
|---|---|
| RPA | Reactive Polyurothane Adhesive |
| RPP | Reinforced PolyPropylene |
| RPTFE | Reinforced Polytetrafluoroethylene |
| RRIM | Reinforced Reaction Injection Molding |
| RSW | Registered Shrink Wrap |
| RTI | Relative Thermal Index |
| RTPU | Rigid Thermoplastic Polyurethane |
| RTR | Reinforced Thermosetting Resin |
| RTV | Reduced Temperature Vulcanization |
| RTV | Room Temperature Vulcanizing (Silicone) |
| RWP | Random Walk Polymer |
| SAMP | South Asia Microform Project |
| SAN | Poly(Styrene AcryloNitrile) |
| SAPB | San Antonio Plastic Bricks |
| SBC | Styrene-Butadiene Co-polymer |
| SBR | Styrene Butadiene Rubber |
| SBS | Poly-(Styrene Butadiene Styrene) |
| SBS | Styrene Butadiene Styrene |
| SCPU | Sociedad de Cirugía Plástica del Uruguay |
| SDR | Standard Diameter Ratio |