Inhibition of the degradation of poly(vinyl chloride) by its modification with 5-pyrimidine carbonitrile (1,2,3,4- tetrahydro-4-oxo-6-phenyl-2-thioxo)

✍ Scribed by Abdel-Naby, Abir S.; Youssef, Ayman M. S.

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 159 KB
• Volume: 46
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/(sici)1097-0126(199808)46:4<336::aid-pi34>3.0.co;2-b

✦ Synopsis

The reaction of poly(vinyl chloride) (PVC) with 5-pyrimidine carbonitrile (1,2,3,4-tetrahydro-4-oxo-6-phenyl-2-thioxo) has been studied. The thermal stability of the modiÐed polymer is improved markedly compared with the unmodiÐed polymer. The stability improvement is attributed to the replacement of the labile chlorine atoms by more stable thio groups. The modiÐed polymer also showed a lower extent of discoloration against ultraviolet rays compared with the unmodiÐed PVC.

1998 SCI.