What is the ESCR?
Environmental Stress Crack Resistance (ESCR) is a vital property required in plastics for its longevity. It is one of the most common causes of unexpected brittle failure in thermoplastic.
What are the factors affecting ESCR test?
The major variables that affect ESCR in polyethylenes include Molecular Weight, Molecular Weight Distribution, Chain Branching (measured indirectly by density), and ESCR testing conditions (i.e., reagent concentration, temperature, stress).
What is ESCR in HDPE?
DURABILITY: ESCR – Environmental Stress Crack Resistance of HDPE.
What is ASTM D1693?
ASTM D1693 : Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics.
How can I improve my HDPE ESCR?
Vistamaxx™ performance polymers can be used to improve the Environmental Stress Crack Resistance (ESCR) of high density polyethylene (HDPE). Because parts made with Vistamaxx enhanced HDPE are tougher than those made with pure HDPE, they are less likely to fail through environmental stress cracking.
What is the role of Cescr?
The Committee on Economic, Social and Cultural Rights (CESCR) oversees implementation of the International Covenant on Economic, Social and Cultural (ICESCR) through its consideration of reports, individual complaints, inter-State complaints, and inquiry requests, and its preparation of general comments, substantive …
What causes cracks in plastic?
When force is applied to plastic, it travels along the polymer chains causing molecules to strain to remain in contact. The polymer chains eventually creep toward the pull and deform. This stage is called creep. With force and time, crazing or stress cracking occurs.
What causes crazing in plastics?
Crazing develops when excessive tensile stress is applied to a polymer, leading to microvoid formation in a plane normal to the stress. The voids initiate at microscopic inhomogeneities in the polymer, and are stabilised by fibrils of plastically deformed polymer chains.
What causes polycarbonate cracking?
Polycarbonate, an amorphous glassy thermoplastic, is susceptible to cracking or crazing when under stress and in contact with a chemical environment.
What is stress cracking test?
The ESC testing process involves applying a known stress to the polymer under test conditions and exposing it to the relevant ESC environment. Our experts can design a testing program to assess your material’s performance when exposed to both primary and secondary stress cracking agents.
How does Cescr addressing human rights violations?
How many African countries have ratified the ICESCR?
seven African States
It should be noted that by the time the ICESCR entered into force on 3 January 1976, only seven African States had ratified the Covenant.