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The melting temperature (or not melting) of poly(vinyl chloride)
Author(s) -
Summers James W.
Publication year - 2008
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.20151
Subject(s) - vinyl chloride , crystallite , materials science , melting temperature , polymerization , fusion , composite material , particle (ecology) , flow (mathematics) , melting point , polyvinyl chloride , melt flow index , chemical engineering , enthalpy of fusion , polymer chemistry , metallurgy , polymer , copolymer , mechanics , linguistics , philosophy , oceanography , engineering , geology , physics
The best answer to what is the melting temperature of PVC is its previous processing temperature. That temperature is where secondary crystallites, created by gelation, melt and allow the primary particle flow units to flow again independently. In the case of powder compounds being processed for the first time, the question of melting is less relevant. The PVC, out of the polymerizer, contains crystallites that are not completely meltable. The issue is how easily the grains of PVC disperse to primary particle flow units. This property depends on polymerization conditions and the type of processing equipment. The temperature achieved affects the amount of fusion (gelation). J. VINYL ADDIT. TECHNOL., 2008. © 2008 Society of Plastics Engineers.