IngentaConnect Effect of annealing rate on film formation from poly(vinyl acetat...

Authors: Arda, Ertan¹; Kara, Selim²; Pekcan, Önder³

Source: Composite Interfaces, Volume 15, Number 1, 2008 , pp. 19-33(15)

Abstract:

The photon transmission technique was used to monitor the time and temperature evolution of film formation from poly(vinyl acetate) (PVAc) latex particles. The latex films were prepared below the glass transition temperature (T_g) of PVAc. These films were annealed at various annealing rates above the T_g of PVAc. It was observed that transmitted photon intensity (I_tr) from these films increased at all annealing rates as the annealing time and temperature are increased. The increase in the I_tr is attributed to the increase in crossing density at the junction surface. The healing points (τ_H, T_H) were determined for various annealing rates and the healing activation energy (ΔH) was measured and found to be 43.4 kcal/mol. The interdiffusion (backbone) activation energies (ΔE) and reptation frequencies (ν) of PVAc chains were measured. The averaged value of ΔE was found to be 226.6 kcal/mol. It is observed that ΔE is unchanged but ν is increased as increasing the annealing rates.

Keywords: PHOTON TRANSMISSION TECHNIQUE; FILM FORMATION; ACTIVATION ENERGY; REPTATION FREQUENCY; ANNEALING RATE

Document Type: Research article

DOI: 10.1163/156855408783431291

Affiliations: 1: Trakya University, Department of Physics, 22030 Edirne, Turkey;, Email: ertana@trakya.edu.tr 2: Trakya University, Department of Physics, 22030 Edirne, Turkey 3: Isik University, Department of Physics, 34398 Maslak, Istanbul, Turkey

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Effect of annealing rate on film formation from poly(vinyl acetate) latex particles