1、Laboratory Test: Detection of Residual Vinyl Acetate Monomer in Poly

LCS Laboratory provides precise analysis of Poly Vinyl Acetate (PVAc) for traces of residual Vinyl Acetate monomer. This testing is essential to verify compliance with industry safety standards and to maintain the quality of your polymer products.

2、Determination of Polyvinyl Acetate in Chewing Gum Using High

In this study, qualitative verification of PVAc was performed using a pyrolyzer–gas chromatography–mass spectrometry (Py–GC–MS). To confirm that PVAc was detected, qualitative analysis was performed using positive containing PVAc and negative samples without PVAc.

3、聚醋酸乙烯酯PVAC的质量检测标准

妮秦集团生产的聚醋酸乙烯酯PVAC树脂执行严格的质量控制政策，每批次生产都要经过严格的检测，测试合格后，才会结束生产。

Testing Standards for Polyvinyl Acetate

2、How to Meet Regulatory Standards with Polyvinyl Acetate Products? Comprehensive guide to polyvinyl acetate (PVAc) regulations: FDA, EFSA, REACH, ASTM, ISO standards for food, construction, and consumer products.

聚乙酸乙烯酯_百度百科

聚乙酸乙烯酯（PVAC），又名聚醋酸乙烯酯。 是乙酸乙烯酯（醋酸乙烯酯）的聚合物，化学式为 (C4H6O2)n，无色黏稠液或淡黄色透明玻璃状颗粒，溶于苯、丙酮和三氯甲烷等溶剂。

Quality Testing for PVAC Resin Polyvinyl acetate factory taken

Nitchen Chemicals adopts ISO9001 management system in the factory for polyvinyl acetate. and our pvac factory adopts extrem strict policy in quality control for pvac resin.

Final Report on the Safety Assessment of Polyvinyl Acetate

PVAc is manufactured by the polymerization of vinyl acetate using peroxide catalysts (Hawley, 1971). The emulsion polymerization reaction is carried out in aqueous solution, and in the presence of surfactants (IARC, 1979).

Polyvinyl Acetate (VAC) Testing

Generally, polyvinyl acetate (PVAc) is synthesized by the monomer of vinyl acetate (VAc) in the mixture of polyvinyl alcohol (PVA) as protective colloid, non-ion emulsifier, initiator, and water.

PVAC Manufacturing Process

After the reaction, distillation method is applied to extract the polyvinyl acetate (pvac) and get rid of the impurities. The distillation temperature is less than 97 degrees as the boiling point of pvac is 71.8-73 degrees. The purified polyvinyl acetate (pvac) goes to the vacuumed drying process.

How to Optimize Viscosity in Polyvinyl Acetate Formulations?

Polyvinyl acetate (PVAc) has been a cornerstone in adhesive and coating industries since its development in the early 20th century. The viscosity of PVAc formulations plays a crucial role in determining the performance and applicability of the final product.

In modern materials science, polyvinyl acetate (PVAc) has garnered significant attention as an important synthetic polymer due to its unique properties and broad applications. Ensuring the quality of PVAc through rigorous testing is critical to meet performance standards. Below are methods for evaluating PVAc quality:

I. Appearance and Color

1. Visual Inspection: Observe the color and transparency of PVAc. High-quality PVAc typically appears uniform white or light yellow, free of discoloration or impurities. Inconsistent color or visible contaminants may indicate subpar quality.
2. Color Testing: Use standard colorimetric cards to compare PVAc’s hue with reference samples. Color consistency is a key indicator of compliance.
3. Transparency Check: Examine PVAc through a clear glass plate to ensure absence of bubbles, cracks, or defects. Transparency directly impacts durability and usability.

II. Physical Properties

1. Density Measurement: Employ Archimedes’ water displacement method or graduated cylinder method to determine density, reflecting material compactness and molecular structure.
2. Melting Point and Softening Point: Analyze thermal properties using differential scanning calorimetry (DSC) or similar instruments. Higher melting points indicate better heat resistance, while lower softening points suggest easier processing.
3. Tensile Strength and Elongation: Conduct tensile tests with a universal testing machine to assess mechanical strength, elasticity, and plasticity.
4. Hardness Test: Measure Shore hardness using a Shore durometer. Hardness reflects resistance to deformation.
5. Impact Strength: Evaluate toughness via Charpy or Izod impact tests. Critical for materials subjected to sudden forces.
6. Compression Strength: Test compressive resistance using a universal testing machine to evaluate load-bearing capacity.
7. Flexural Strength: Assess bending resistance with a flexural testing apparatus to simulate complex stress scenarios.
8. Abrasion Resistance: Simulate wear conditions using sandpaper or ball mill tests to gauge durability.
9. Thermal Conductivity: Measure heat transfer efficiency using a thermal conductivity meter, essential for thermal management applications.

III. Chemical Properties

1. Solubility Test: Evaluate dissolution in various solvents to determine processability and suitability.
2. pH Resistance: Soak samples in acidic/alkaline solutions to test chemical stability.
3. Oxidation Resistance: Assess oxidative stability via accelerated aging or induction period tests.
4. Flame Retardancy: Use UL94 vertical burning or oxygen index tests to evaluate fire safety.
5. Antistatic Property: Measure surface resistivity or treat with antistatic coatings to reduce charge accumulation risks.
6. Electrical Insulation: Test dielectric constant and dissipation factor to ensure safe electrical performance.
7. Thermal Stability: Analyze thermal degradation via thermogravimetric analysis (TGA).
8. Chemical Resistance: Soak in chemicals (acids, bases, salts) to assess protection against corrosion.
9. Biodegradability: Conduct composting or biodegradation rate tests for eco-friendly applications.
10. UV Stability: Accelerate weathering under UV light to simulate outdoor durability.

IV. Mechanical Properties

1. Tensile/Ultimate Strength: Measure maximum stress before failure under tension.
2. Flexural/Bending Strength: Evaluate resistance to bending forces.
3. Shear Strength: Test resistance to parallel applied forces using shear fixtures.
4. Compression Set: Assess permanent deformation after compressive loading.
5. Fatigue Strength: Determine endurance limits under cyclic loading.
6. Creep Resistance: Study deformation behavior under prolonged stress.
7. Dimensional Stability: Analyze size retention after thermal/mechanical stress.
8. Water Absorption: Weigh samples post-immersion to calculate moisture uptake.
9. Barrier Properties: Test air/moisture permeability for packaging applications.
10. Sound Insulation: Measure acoustic damping capabilities for construction/automotive use.

V. Optical Properties

1. Light Transmittance: Quantify percentage of light passing through the material.
2. Haze: Evaluate light scattering at surfaces, critical for coatings/films.
3. Refractive Index: Determine optical clarity for lens/prism design.
4. Chromatic Aberration**: Assess color dispersion in optical elements.
5. Absorbance Spectrum: Analyze light absorption characteristics for material selection.
6. Spectral Transmittance: Map wavelength-specific light transmission for specialized applications.

This comprehensive testing framework ensures PVAc meets industry standards for safety, performance, and longevity.