What are the conditions for plastic toughening?

Posted on

The main method of plastic toughening is to use the elastomer as the dispersed phase, and the plastic is blended and toughened by the matrix, which can greatly improve the impact strength of the plastic. Elastomer toughened plastics mainly meet three conditions:
1. The elastomer and the resin form a two-phase structure, but also have a moderate compatibility to ensure good adhesion between the two phases;
2. The amount of elastomer added should reach a certain number of parts;
3. The molecular chain of the elastomer is less flexible, that is to say, a lower Tg is required, especially when the Tg of the elastomer is lower at low temperature, and the low temperature toughness is better.
Since pure elastomers are non-polar materials, and plastics (such as PA, PBT) are polar materials, the two are incompatible, pure elastomers can not effectively toughen plastics, so it is necessary to form POE grafts by POE by graft modification. The grafted functional group can react with the end group of the substrate to provide a certain compatibility, so that the two phases have good adhesion, thereby enabling the base resin to greatly improve the impact strength. For example, MAH of CMG5805-L (POE-g-MAH) can react with the amine group of nylon to effectively toughen PA. When a certain number of parts is added to 5805-L, a super-tough material is formed.

Stone Garden Decor

There are many ways to design stone carvings, among which the sink carving, also known as "line carving", is an artwork using the "water mill sink flower" carving method. This kind of carving method absorbs traditional techniques such as Chinese painting and meaning, overlapping, line modeling, scattered point perspective, etc. After the stone is polished by plane processing, it traces the pattern text, and then carves lines according to the drawing, with the thickness and depth of the lines, using shadows to reflect the three-dimensional sense. Most of these products are used for exterior wall surface decoration of buildings, with strong artistry.

Stone Garden Decor,Cast Stone Garden Decor,Cast Stone Garden Decor Fountains,Outdoor Stone Garden Decor

The universe in the stone is great , https://www.zdsarts.com