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Effect of elemental sulfur in the crosslinking reaction of poly(vinyl chloride) with tetramethyl thiuram disulfide
Author(s) -
AriasMarín Eduardo,
Ramos De Valle Luis F.,
RodríguezFernández Oliverio,
RodríguezVelázquez Jesús
Publication year - 1995
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.730010405.n
Subject(s) - curing (chemistry) , ultimate tensile strength , sulfur , elongation , vinyl chloride , materials science , disulfide bond , polymer chemistry , composite material , chemistry , polymer , copolymer , metallurgy , biochemistry
The effect of elemental sulfur (S 8 ) and tetramethyl thiuram disulfide (TMTD) on the chemical crosslinking of PVC is studied. The tensile strength, elongation at break, and gel content of crosslinked and uncrosslinked PVC molded samples, cured at different times in hot air, are evaluated. It was found that crosslinking PVC with TMTD improves its mechanical properties, and adding S 8 produces a slight improvement. Also, the S 8 presence accelerated the PVC/TMTD crosslinking reaction when the crosslinking reaction was carried out under shear forces, but not when the curing was done in hot air, where the S 8 retards the process.