An overview of the characterization of poly(vinyl chloride)

The present study evaluated the use of epoxidized esters of succinic acid, oleic acid, and propylene glycol as a bioplasticizer for poly(vinyl chloride) (PVC) and compared the results with the commercial phthalate plasticizer di(2‐ethylhexyl)phthalate. The chemical properties, structure, and biodegradation of the obtained bioplasticizer were analyzed. In order to analyze the influence of different PVC processing conditions on the properties of the obtained samples, the gelation process was carried out at 170, 180, 190, and 200°C at a time of 1.5–10.0 min. Mechanical properties, thermal characteristics, Fourier transform infrared spectroscopy analysis, plasticizer migration, and color change were determined for the resulting plasticized PVC samples. The performed studies allowed to confirm the obtaining of a biodegradable bioplasticizer (after 28 days, the decomposition rate in respirometry test was 72.7%). The optimal conditions for PVC processing were determined. For them the properties of the obtained material were superior. Processing PVC at 170°C for 7.5 min proved to be the most optimal conditions for the bioplasticizer synthesized in this study. Under these conditions, tensile strength of about 23 MPa and elongation at break of 200% were obtained, while plasticizer migration was very low (4.4% after 7 days and 6.8% after 28 days).

Section: Introductionmentioning

confidence: 99%

Epoxidized esters of succinic acid, oleic acid and propylene glycol as an effective bioplasticizer for PVC: A study of processing conditions on the physico‐chemical properties

Ledniowska,

Janik,

Nosal‐Kovalenko

et al. 2024

Preparation and application of low molecular weight poly(vinyl chloride). IV. Preparation and characteristics of poly(vinyl chloride) with broad molecular weight distribution

Yamamoto

Mitsui

Mitani

et al. 1994

SYNOPSISPoly(viny1 chloride) (PVC) with a broad molecular weight distribution (BMD-PVC) was prepared by suspension polymerization in the presence of PVC with relatively lower molecular weight (LMW-PVC ) , which was prepared by suspension polymerization in the presence of 2-mercaptoethanol as a chain-transfer agent. It is elucidated using porosity measurement, scanning electron microscopy ( SEM ) , and energy dispersion X-ray microscopy (EDXM) that the resultant BMD-PVC grains have an interesting internal structure at the level of primary particles. Discoloration time and fusion time of the BMD-PVC was studied. Discoloration time and fusion time of BMD-PVC is particularly dependent on the polymerization degree (Pw) of LMW-PVC and LMW-PVC content in the BMD-PVC samples.

Preparation and application of low‐molecular‐weight poly(vinyl chloride). V. Preparation and characteristics of blended poly(vinyl chloride) by two‐step suspension polymerization

Yamamoto

Mitsui

Mitani

et al. 1994

SYNOPSISPoly (vinyl chloride) (PVC) with relatively broader molecular weight distribution (BMD-PVC) was prepared by two-step suspension polymerization: ( 1) preparation of poly (vinyl chloride) with relatively higher molecular weight (HMW-PVC) and ( 2 ) successive preparation of poly (vinyl chloride) with relatively lower molecular weight (LMW-PVC) in the presence of the resultant HMW-PVC and 2-mercaptoethanol as a chain transfer agent. Some properties of BMD-PVC were investigated fusion time, melt viscosity, discoloration time, tensile strength at yield, tensile modulus in tension, and elongation at break. 0 1994