PA6 glass fiber reinforced materials should have high strength, high wear resistance, resistance to corrosion by capacitors, and a wide range of operating temperatures. However, they are easy to absorb moisture at low temperatures and have poor toughness. In most cases, elastomers such as octene-ethylene grafted maleic anhydride (POE-g-MAH) are used as toughening agents for modification. The disadvantage is that part of the rigidity and operating temperature properties must be sacrificed. Currently, a toughener with better performance is the random copolymer of PA6/PA6.
PA6/PA66 random copolymer is a polymer product produced by condensation polymerization by adding defoaming agent, adipic acid, etc. to caprolactam and nylon 66 salt, using a certain ratio. The ratio of PA6 to PA66 salts is between 75:25 and 85:15. The production device is very similar to the PA6 polymerization device, except that a nylon 66 salt and caprolactam mixing device is added.
PA6 glass fiber reinforcement using PA6/PA66 copolymer as the toughener has three major advantages over octene-ethylene grafted maleic anhydride (POE-g-MAH):
PA6/PA66 copolymer slices
1. PA6/PA66 copolymer has better compatibility with PA6 glass fiber reinforced materials and will not reduce the fluidity of the material like octene-ethylene grafted maleic anhydride (POE-g-MAH). It can also improve the fluidity of the material to a certain extent.
2. There is not much difference in price between the two. When the dosage is 12%, there is not much difference in the improvement of the notched and unnotched impact strength of PA6 glass-strength materials. However, when PA6/PA66 copolymer is used as a toughener, the tensile strength, flexural strength and thermal deformation temperature HDT of the material are obviously higher.
3. Octene-ethylene grafted maleic anhydride (POE-g-MAH) affects the crystallization of PA6 glass fiber reinforced materials, but PA6/PA66 copolymer has basically no effect on the crystallinity of the material, and the overall performance of the material is better.
