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Abstract
The word "thermoplastic" is defined as "becoming soft when heated and hard when cooled." With true thermoplastic materials, the process is repeatable, with the material capable of being melted and remelted again and again until ultimate degradation of the compounded material occurs. Thermoplastic roofing materials are most commonly compounded from polyvinyl chloride resins and proprietary modifiers and/or reinforcements to form waterproofing membranes. Because PVC is inherently hard and relatively inflexible, it must be compounded with other polymers to make the finished roofing membrane flexible and rubbery. This article discusses compounding thermoplastics and some concerns.
The word "thermoplastic" is defined as "becoming soft when heated and hard when cooled." With true thermoplastic materials, the process is repeatable, with the material capable of being melted and remelted again and again until ultimate degradation of the compounded material occurs. Thermoplastic roofing materials are most commonly compounded from polyvinyl chloride resins and proprietary modifiers and/or reinforcements to form waterproofing membranes. Because PVC is inherently hard and relatively inflexible, it must be compounded with other polymers to make the finished roofing membrane flexible and rubbery. This article discusses compounding thermoplastics and some concerns.
Date
5/1987
5/1987
Author(s)
Richard Baxter
Richard Baxter
Page(s)
56-57
56-57
Keyword(s)
PVC; heat weld; solvent weld; extruded; plasticizer; polyblend;
PVC; heat weld; solvent weld; extruded; plasticizer; polyblend;