STRESS-CRACKING RESISTANCE OF POLYCARBONATE IN CONTACT WITH
Migration of monomeric esters to substrates, such as polycarbonate, is well documented.1,3 Polymeric esters have been investigated less extensively than have monomerics. In this study, we mixed several types of monomeric and polymeric esters in PVC compound. The polymeric polyester plasticizers varied in viscosity, polarity and chemical structure.
Hallstar | Innovative, leading-edge, ester chemistry solutions
New polymeric esters from Hallstar have been specifically designed to be highly compatible with low ACN (H)NBR, EPDM, TPV, TPO, PE and PP polymer compounds. The polymeric nature increases modifier permanence without sacrificing low temperature and general mechanical performance.
SUPRMIX DAP | Hallstar Industrial
The Hallstar Company Web Site: hallstar.com
PLASTHALL DOZ | Hallstar Industrial
The Hallstar Company Web Site: hallstar.com
PARAPLEX A-8000 | Hallstar Industrial
PARAPLEX A-8000 is a low molecular weight polymeric ester. PARAPLEX A-8000 offers the best low-temperature performance when compared to other polymeric plasticizers. PARAPLEX A-8000 also offers better permanence, volatility and migration resistance than monomeric plasticizers.
- Which ester plasticizers were tested?
- Six Hallstar ester plasticizers were mixed into a neoprene WK compound and evaluated to assess the plasticizer effects on the crystallization rate. The results show Paraplex® G-62 interferes with the cure system used in our standard neoprene WK recipe.
- What factors affect Plasticizer-elastomer interaction?
- Plasticizer–elastomer interaction is governed by many factors, such as solubility parameter, molecular weight and chemical structure. Ester plasticizers are selected based upon cost/performance evaluation. The rubber compounder must evaluate ester plasticizers for compatibility, processability, permanence and performance properties.
- How are ester plasticizers selected?
- Ester plasticizers are selected based upon cost/performance evaluation. The rubber compounder must evaluate ester plasticizers for compatibility, processability, permanence and performance properties. The study of these properties by the rubber compounder will contribute to the selection of a high-performance ester plasticizer.
- How do ester plasticizers affect crystallization rate?
- Unfortunately, the use of ester plasticizers does not usually help prevent crystallization and, in many cases, will actually accelerate the crystallization rate. Crystallization effects and Tg must both be considered when designing neoprene materials for low-temperature service.
- How to choose a high-performance ester plasticizer?
- The rubber compounder must evaluate ester plasticizers for compatibility, processability, permanence and performance properties. The study of these properties by the rubber compounder will contribute to the selection of a high-performance ester plasticizer. 1.
- Do fluorocarbon elastomers accept ester plasticizers?
- Fluorocarbon elastomers will accept a relatively wide range of ester plasticizers, but here, with both the high temperature post cure and application temperatures ranging to 232°C, they find use only at very low levels for processing. The selection of an ester plasticizer can often be confusing because of the large choice available.
