What are the Properties and Applications of Modified PPO Plastics?

2026-01-19

Modified PPO (Polyphenylene Oxide), exemplified by brands like Noryl, typically refers to alloys such as PPO/PA (Nylon) or PPO/PS. These blends, often with ABS, PC, or other resins, exhibit a lower, more predictable molding shrinkage than crystalline plastics, making them excellent for high-precision components. Their properties, including mechanical strength, remain stable across a wide temperature range due to a high glass transition temperature.

Under high load, the heat deflection temperature (HDT) of modified PPO grades ranges from 90°C to 170°C, with reinforced variants like the CRN series reaching approximately 200°C while achieving UL94 V-0 flame retardancy. Grades such as Noryl GTX offer low-load HDTs of 185-195°C, sufficient to withstand automotive paint shop oven temperatures. Electrically, modified PPO exhibits a low and stable dielectric constant and loss factor across frequencies, with high volume resistivity and breakdown voltage. It offers good resistance to acids and bases but can be attacked by chlorinated solvents and aromatic hydrocarbons.

PC/ABS

PPO

PA6/PA66

PCR

PC/ABS

PPO

PA6/PA66

PCR

What are the Properties and Applications of Modified PPO Plastics?

What are the Properties and Applications of Modified PPO Plastics?