Soft PVC foams: Study of the gelation, fusion, and foaming
Phthalates are the most used plasticizers for PVC, and in a previous article (part I of this series), we discussed the influence of phthalate ester type plasticizers on the foaming process and on the quality of the foams obtained from the corresponding plastisols.
Soft PVC foams: Study of the gelation, fusion, and foaming
Phthalates are the most used plasticizers in flexible PVC foam formation. In this study, we have studied the influence of the phthalate ester-type plasticizers on the foaming process and the quality of the foams obtained from the corresponding plastisols.
Soft PVC Foams: Study of the Gelation, Fusion, and Foaming
A series of plastisols prepared by mixing a high and a low compatible phthalate ester plasticizer in several proportions (100/0, 75/25, 50/50, 25/75, 0/100 ratios) has been studied and
Improving Processing of PET, the World’s Most Recycled Plastic
Phthalates are low molecular weight monoesters made from orthophthalic acid. By comparison, PET is a high molecular weight polyester made from terephthalic acid and these forms are chemically very different. Phthalates (i.e. phthalate ester plasticizers) are not used in the manufacture of PET, and PET itself is not a phthalate.
Migrability of pvc plasticizers | Semantic Scholar
Soft PVC foams: Study of the gelation, fusion, and foaming processes. I. Phthalate ester plasticizers A. Zoller, A. Marcilla Materials Science 2011 The foaming of PVC (poly (vinyl chloride)) plastisols is a complex combination of simultaneous processes, involving the curing and structural changes of the plastisol, the gas generation and the foam…
- What are phthalate esters used for?
- Phthalate esters are used as plasticizers. Phthalate esters are used to prepare in harsh conditions, at a higher reaction temperature. FeCl 3-catalyzed esterification of alcohols with phthalic anhydride affords phthalate esters, under mild conditions. Phthalates are esters of phthalic anhydride.
- What factors affect the foaming effect of PVC plastisol?
- The greater the value of these three parameters, the better the foaming effect. The degree of polymerization of the paste resin and the particle morphology directly affect the rheological parameters, namely Tηmax, of PVC plastisol, and subsequently affect the magnitude of Tf − Tηmax and Tf (5%) − Tηmax, which in turn affect the quality of the foam.
- Which Plastisol formulation has the best foaming quality?
- The results indicate that formulation S5 has the best foaming quality using past resins produced with the seed emulsion method, and formulation S6 made the best plastisol samples from paste resins produced through the micro‐suspension method.
- Can FECL 3 be used as a catalyst for phthalate esterification?
- Synthesis of phthalate esters. Now we have found that a neutral and cheap FeCl 3, as a Lewis acid catalyst for esterification, promotes nucleophilic addition of alcohols 2 to phthalic anhydride (1), at much lowered temperatures (50 or 100 °C) affording commercially valuable phthalates, in a simplest way so far ever reported.
- What is FECL 3-catalyzed esterification of alcohols with phthalic anhydride?
- FeCl 3-catalyzed esterification of alcohols with phthalic anhydride affords phthalate esters, under mild conditions. Phthalates are esters of phthalic anhydride. Phthalic anhydride (1) has been reacted with alcohols 2 to synthesize phthalate monoesters 3 and diesters 4 with the favor of latter compound that primarily used as plasticizers worldwide.
- How are phthalate monoesters formed?
- Mechanistically, the first step is the formation of phthalate monoesters 3 that involves a facile addition-displacement pathway, and the second step is essentially underwent a Lewis acid catalysis providing phthalate diesters 4 with very good yields.
