High-performance engineering plastics--PPO polyphenylene ether material. Excellent heat resistance, electrical properties, high strength and creep resistance and so on, endow PPO materials with application advantages in automotive
, electronic appliances, 5G and other fields.
Due to the high melt viscosity and poor fluidity of PPO materials, modified PPO materials (MPPO) are currently on the market, and PPO alloy modified materials are the most important modification methods.
The following are common PPO alloy modified materials on the market, let's take a look:
01. PPO/PA alloy material
PA material (nylon) has excellent mechanical properties, wear resistance, self-lubrication, easy processing and other characteristics, but the polar high water absorption is relatively large, and the size of the product changes greatly after water absorption.
The PPO material has extremely low water absorption, good dimensional stability, and excellent creep resistance, but poor processability. It can be said that PPO/PA alloy material combines the excellent properties of the two. This alloy material is also a kind of alloy with rapid development and more varieties among PPO alloys. It is mainly used for auto parts, such as wheel covers, engine peripheral parts, etc. .
It should be noted that amorphous PPO and crystalline PA are thermodynamically incompatible, and their simple blend products are easy to delaminate, have poor mechanical properties, and have low practical value; appropriate measures must be taken to improve the performance of the two. compatibility to improve its performance. Adding a suitable compatibilizer and adopting a suitable process can effectively improve the compatibility of PPO and PA.
02. PPO/HIPS alloy material
PPO material has good compatibility with polystyrene material, and can be blended in any proportion without reducing the mechanical properties too much.
The addition of HIPS to the PPO material increases the notched impact strength. Generally, in order to further improve the impact strength of the system and improve the overall performance, elastomers are often added as toughening modifiers, such as SBS, SEBS, etc.
Moreover, PPO itself is a kind of polymer that is flame-retardant, easy to form carbon, and has self-extinguishing properties. Compared with pure HIPS, the flame-retardant properties of PPO/HIPS alloys can also be significantly improved. With the increase of the amount of PPO, the melting dripping and smoking of the polymer alloy during combustion gradually decreased, and the horizontal combustion level gradually increased.
Main application fields: heat-resistant parts of automobiles, electronic instruments and electric machinery, parts of steam sterilization equipment, etc.
03. PPO/PP alloy material
The price and performance of PPO/PP alloys are between those of engineering plastics, such as PA, ABS, long glass fiber PP, modified PET and PBT, etc., and they have achieved a higher level of rigidity, toughness, heat resistance and price. good balance. Applications are in the automotive industry, power, tool boxes, food handling trays, fluid conveying components (pump housings), etc.
The alloys are favored by automakers because of their compatibility with other plastics at the time of recycling, i.e. they can be blended and recycled with other PP-based plastics or a range of polystyrene-based plastics.
04. PPO/PBT alloy material
Although PBT materials have good comprehensive properties, there are still problems such as easy hydrolysis, inability to withstand hot water for a long time, products prone to anisotropy, molding shrinkage and warpage, etc. Alloy modification with PPO materials can effectively improve each other. performance flaws.
According to related alloy material research, low viscosity PPO material is more suitable for blending with PBT material alloy, but it also needs compatibilizer for compatibilization.
Commonly used to make electrical appliances, electronic equipment parts and so on.
05. PPO/ABS alloy material
ABS material contains PS structure, which has good compatibility with PPO and can be directly blended. ABS material can significantly improve the impact strength of PPO, improve stress cracking, and give PPO electroplatability, while maintaining other comprehensive properties of PPO.
The price of ABS is lower than that of PPO, and the market resources are abundant. Because the two are mutually compatible and the alloying process is simple, it can be said that it is a general-purpose PPO alloy, which is suitable for auto parts, electromagnetic shielding shell materials, office supplies, office machinery and spinning tubes, etc.