Plasticizer effect on the melting and crystallization
The melting and crystallization behavior of polyvinyl alcohol (PVA) were examined as a function of plasticizer amount. The melting temperature () of PVA decreased with increasing the amount of glycerin. The effect of a plasticizer rapidly diminished when the phase separation of glycerin in PVA occurred.
Plasticizer effect on the melting and crystallization
Effect of plasticizer on melting behavior Most of the plasticizers used in PVA are capable of reducing the melting point of a PVA, and provide the flexibility to a final product. The most generally used plascitizer is triethylene glycol and glycerin [1], [2], [7], [8], [9], [10].
Plasticizer effect on the melting and crystallization
The melting and crystallization behavior of polyvinyl alcohol (PVA) were examined as a function of plasticizer amount. The melting temperature (Tm) of PVA decreased with increasing the amount of
Effect of Natural Glyceryl Tributyrate as Plasticizer and
When polymers were blended and plasticized, as the TB content was increased the cold crystallization temperature decreased, by following the same trend observed in Tg. The reason of such a variation is probably the lowering of the transport barrier for crystallization due to the increment in the polymer chain mobility [ 28 ].
Plasticizer effect on melt blending of polylactide stereocomplex
The generation of a stereocomplex structure increased the melting temperature, crystallization temperature and overall degree of crystallization significantly. The addition of plasticizer to the PLA and stereocomplex increased the degree of crystallinity but depressed the thermal stability and Tg, which indicates improved flexibility.
- Does a plasticizer affect the melting and crystallization behavior of PVA?
- Conclusions We have investigated the effects of a plasticizer, thermal history and PVA blend on the melting and crystallization behavior of PVA. In case of melting behavior, the melting point ( Tm) of PVA was reduced with increasing the amount of a plasticizer regardless of the degree of hydrolysis.
- How do Plasticizers improve the crystallization of PLA?
- By widening the crystallization window between Tg and the melting temperature (Tm), plasticizers enhance the crystallization of PLA , . Based on the literature analysis , one of the most suitable plasticizers for PLA is Oligomeric Lactic Acid (OLA).
- What is the effect of plasticizer on melting behavior?
- Effect of plasticizer on melting behavior Most of the plasticizers used in PVA are capable of reducing the melting point of a PVA, and provide the flexibility to a final product. The most generally used plascitizer is triethylene glycol and glycerin , , , , , .
- Does a plasticizer affect crystallization behavior?
- However, the effect of a plasticizer was different according to the degree of hydrolysis, and decreased due to the phase separation of a plasticizer in PVA. In case of crystallization behavior, a fully hydrolysed PVA was affected with the amount of plasticizer, and a partially hydrolysed PVA was mainly influenced by the thermal history.
- How to measure the melting behavior of plasticized PLA crystallized at different temperatures?
- In order to measure the melting behavior of plasticized PLA crystallized at different temperatures, a first heating up to 200 °C was applied, followed by quenching at 50 °C min −1 to 0 °C; this allowed to avoid melt crystallization, thus obtaining a fully amorphous material.
- Does cold crystallization change the temperature of plasticized PLA compounds?
- Based on the storage modulus of nucleated and, at the same time plasticized PLA compounds, when a cold mold was used for production, we found that the curves shifted to a lower temperature region as a consequence of the plasticizer effect (decreasing Tg). On the contrary, cold crystallization temperature also shifted to a lower temperature region.
