The synthesis of thermoplastic polyurethane elastomers (TPUs) is generally carried out using the prepolymer method. To study the influence that the properties of the prepolymer may have in the final TPUs, four TPUs were prepared by using different NCO/OH ratios. The prepolymers and the macroglycol u
On the relationship between the thermal properties of modified polyurethane elastomers and the efficiency of antipyrens
β Scribed by K. Troev; K. Markova; G. Borisov
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- English
- Weight
- 396 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0021-8995
No coin nor oath required. For personal study only.
β¦ Synopsis
A study is made of the relationship between the thermal properties of polyurethane elastomers and the efficiencies of antipyrens containing phosphorus and some containing both phosphorus and chlorine. It is shown that a relationship exists between the thermal properties of polyurethane elastomers and the efficiencies of the antipyrens. It is also found that the presence of antipyrens in the molecules of the polyurethane elastomer effects the course of DTA, DTG, and TG curves. This permits antipyren efficiency to be qualitatively evaluated as well as the antipyren optimal concentration to be determined.
π SIMILAR VOLUMES
Poly(esterurethane) elastomers were synthesized by a pre-polymer process. The pre-polymer based on poly(caprolactone) (capa-225) and toluenediisocyanate (TDI) was mixed with 1,4-butane diol (BDO) or dihydroquinone (HQ) in capa-225 (known as the quasi pre-polymer process) and then reacted in a mould.
Thermoplastic polyurethane elastomers (TPUs) of constant composition were prepared by using the prepolymer method and by changing the reaction conditions (prepolymerization and chain-extension time) to study the influence of these conditions on the final TPU properties. The TPUs were characterized b
## Abstract Polystyrene is, after polyolefins, the most widespread polymer in both industry and everyday life, successfully replacing some raw natural materials. In this study, the chemical modification of polystyrenes of different molecular weights was performed with various functional group modif