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Synthesis of poly(vinyl chloride)-co-poly(acrylic acid) by precipitation polymerization and its usage as CaCO3 modifier in rigid PVC composites.
- Source :
- Journal of Macromolecular Science: Pure & Applied Chemistry; 2021, Vol. 58 Issue 8, p557-566, 10p
- Publication Year :
- 2021
-
Abstract
- Incorporating carboxyl group into the poly(vinyl chloride) (PVC) resin can endow PVC with reactivity in some applications. In this work, poly(vinyl chloride)-co-poly(acrylic acid) random copolymer (PVCA) with low average number molecular weight (M<subscript>n</subscript>, ∼10 k) is synthesized by precipitation polymerization. By tuning acrylic acid dropping rate, the PVCA copolymer with much more uniform copolymer composition is obtained in comparison to all monomer-in process. Subsequently, the PVCA is utilized as a novel polymer modifier for the surface treatment of CaCO<subscript>3</subscript> particles and its effect on the mechanical properties of obtained rigid PVC composites are evaluated systematically. As a result, the PVAC modified CaCO<subscript>3</subscript> particles exhibit uniform dispersibility and excellent compatibility in PVC matrix. Additionally, the thermal stability is improved significantly owing to the calcium ions on the surface of CaCO<subscript>3</subscript> particles, which scavenge the hydrogen chloride and retard the autocatalytic dehydrochlorination process. Impressively, it also has an enhancement both in tensile strength (ca. 46.4 MPa, and 119.8% elongation at break) and in impact strength (2.7 kJ m<superscript>−2</superscript>) in comparison to those modified by commercialized agents such as stearic acid and titanate ester. This work provides valuable insights for the preparation of vinyl chloride copolymers and opens a new application. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10601325
- Volume :
- 58
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Journal of Macromolecular Science: Pure & Applied Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 151739108
- Full Text :
- https://doi.org/10.1080/10601325.2021.1901592