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- W1557209968 abstract "Suspended emulsion polymerization was used to prepare poly(vinyl chloride) (PVC) resin. Fine PVC particles were formed at low polymerization conversions. The amount of fine particles decreases as conversion increases and disappears at conversions greater than 30%. Scanning electron micrographs show that PVC grains are composed of loosely coalesced primary particles, especially for PVC resins prepared in the presence of poly(vinyl alcohol) dispersant. The size of primary particles increases and porosity decreases with the increase of conversion. In view of the particle features of PVC resin, a particle formation mechanism including the formation of primary particles and grains is proposed. The formation process of primary particles includes the formation of particle nuclei, coalescence of particle nuclei to form primary particles,and growth of primary particles. PVC grains are formed by the coagulation of primary particles. The loose coalescence of primary particles is caused by the colloidal stability of primary particles and the low swelling degree of vinyl chloride in the primary particles." @default.
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- W1557209968 date "2003-01-01" @default.
- W1557209968 modified "2023-09-26" @default.
- W1557209968 title "PARTICLE MORPHOLOGY OF POLY（VINYL CHLORIDE） RESIN PREPARED BY SUSPENDED EMULSION POLYMERIZATION" @default.
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