Stress cracking of rigid polyvinyl chloride by plasticizer
Environmental stress cracking (ESC) (failure caused by crack and craze formation at a stress less than the yield stress) reduces the service life of many plastic products. This paper is concerned wit...
Stress cracking of rigid polyvinyl chloride by plasticizer
Environmental stress cracking (ESC) (failure caused by crack and craze formation at a stress less than the yield stress) reduces the service life of many plastic products. This paper is concerned with ESC of rigid PVC products which are in contact with a plasticized PVC material.
Plasticizer-Induced Stress Cracking of Rigid PVC and
The ATBC plasticized PVC compound was able to induce visible stress cracking in the rigid PVC test specimens within 14 days of exposure. Flexible PVC compounds plasticized with dioctyl phthalate (DOP) and dioctyl terephthalate (DOTP) were able to induce stress cracking in the rigid PVC test specimens within 28 days of exposure.
Plasticizer-Induced Stress Cracking of Rigid PVC vs
This whitepaper explains the cause and impact of plasticizer-induced stress cracking, as well as the relative stress crack-resistance of specialty-formulated rigid PVC versus polycarbonate (et al) when exposed to PVC plasticizers commonly used in PVC medical tubing applications.
What is the best alternative to DEHP for medical-grade PVC
The stress cracking is caused by the migration of plasticizer to the interface with the rigid component, and it is most pronounced in the case of amorphous rigid materials like polycarbonate. The stress cracking or crazing that weakens the rigid component takes place more slowly with TOTM than with DOTP.
- How does plasticizer affect tensile stress?
- In case of soft PVC ,There is an increase in tensile stress, relative density and Hardness with increasing % plasticizer. In case of soft PVC , % Elongation at break increased with increasing plasticizer content and reached maximum value of (380 % ) at 70 % weight of plasticizer and then decreased.
- Is tensile stress directly proportional to plasticizer content?
- In case of soft PVC, experimental results show that tensile stress is directly proportional with plasticizer content and the optimum % plasticizer is 70 %. Relative density of soft PVC is directly proportional with % weight of plasticizer and the optimum % plasticizer is 70 %.%
- How does plasticizer content affect elongation at break?
- Elongation at break increased with increasing plasticizer content and reached maximum value of (380 %) at 70 % weight of plasticizer and then decreased. Hardness (shore A) is directly proportional with plasticizer content. Key words - PVC, compounding, fillers, plasticizers,stabilizers,lubricant, physical properties, mechanical properties.
- What is the filler content of rigid PVC?
- In case of rigid PVC, the filler content ranged from 10- 20% by weight of sample, tribasic lead sulfate (2.2 wt%) and lubricant (stearic acid 0.5 wt%) and no plasticizer is added in the sample .
- What percentage of PVC elongation increases with increasing filler content?
- % Elongation at break increased with increasing filler content and reached maximumvalue of (200 %) at 12 % weight of CaCO3 filler.Relative density of rigid PVC is directly proportional with % weight of filler.
- How to prepare PVC resin?
- Preparation of PVC resin with a mixture of heat stabilizer (lead compound), lubricant(stearic acid ) and fillers (calcium carbonate Caco3): (Rigid PVC) by weight) for calcium carbonate at a temperature of 120 C for about half an hour with continuous stirring. The composite was taken to measure the properties of PVC- CaCO3- composite . 2.2.2.
