Effect of glycerol plasticizer loading on the physical, mechanical
The increment in flexibility was due to plasticizer of the smaller molecular size, which allowed them to slide in the spaces between molecules of polymer chains, decreasing the strength of
The effects of plasticizers on solvent bond strength in flexible PVC tubing
This study was also used to determine how solvent and plastic choice affects bond strength between flexible PVC tubing and the plastic luer. The three factors tested were the plasticizer used in making the tubing, the plastic used to make the luers, and the solvent used for bonding.
Solvent Cementing of Plastics - ScienceDirect
[11, 12] In solvent bonding, plasticizer migration from a less rigid substrate, such as flexible PVC, to a more rigid substrate can result in stress cracking and crazing, depending on the solvents and combination of substrates used in bonding. Plasticizer migration will occur after a plasticizer-free surface has been obtained.
Plasticizer - an overview | ScienceDirect Topics
Plasticizers may comprise 15–50% of a PVC formulation. By changing type and amount of plasticizer, properties can be tailored to requirements. Increasing plasticizer concentration increases flexibility, decreases tensile strength, and reduces hardness (e.g., Figure 1 ).
Seal materials in flexible plastic food packaging: A review
Soybean polysaccharide and cassia-gum are examples of other polysaccharides that can be used in combination with plasticizers, mainly glycerol, sometimes combined with sorbitol, to produce heat sealable packaging films. 170-173 Seal strength of plasticized soybean polysaccharide films increases with higher amounts of nanorod-rich ZnO, up to 0.8 N.mm 1 with 4% nanorod content, related with
- Does covalent bonding affect plasticization efficiency?
- Covalent bonding of plasticizer molecules and PVC chains is an effective way to suppress the migration of a plasticizer from plastics. Although they not able to exhibit good plasticization efficiency, new internal plasticizers are still developed. There are several studies describing internal plasticizers and this issue is still being investigated.
- Why do flexible PVC products need plasticizers?
- The properties of flexible PVC products significantly change with addition of plasticizers, such as reduction of the glass transition temperature (Tg) and tensile strength, while elongation will increase, which make PVC change from hard and brittle to flexible, thus greatly expand its application [, , ].
- How do plasticizers affect the viscoelastic properties of PVC gels?
- In PVC gel systems, the viscoelastic properties exhibit a pronounced dependence on frequency . Microscopically, the introduction of plasticizers has the effect of weakening the interactions between the PVC molecular chains and reducing the degree of polymerization of the internal network.
- How do plasticizers affect the pliability of PVC polymers?
- The addition of plasticizers serves to attenuate these dipole interactions within PVC polymers, thereby reducing both the glass transition temperature (T g) and the flow temperature (T f), endowing the polymer fluidity and pliability . M.
- Can Plasticizers improve the mechanical properties of a polymer?
- The mechanical properties of the polymer that may be improved by the addition of plasticizers include decreased the tensile strength and Young’s modulus and increased in percent elongation, toughness and resistance to cracking, etc. ( 17 – 20 ).
- Does a mixture of Plasticizers improve the mechanical properties of PVC?
- Moreover, the mechanical properties were improved when a mixture of plasticizers was applied in PVC blends, whereas a blend with pure SOHE showed worse mechanical properties (lower elongation at break and higher tensile strength) than DOP.
