2013年6月7日星期五

The basic application of plastics additives

Nucleating agent is used to change the crystallization behavior of polypropylene, thereby changing its crystalline morphology, mechanical properties, thermal and optical performance of functional additives.impact modifier
HBP polypropylene nucleating agent added nucleating agent modified polypropylene has good transparency, high gloss, excellent mechanical properties and processing characteristics, its use is also more extensive.
POM nucleating agent; polyoxymethylene (POM) is an excellent high-crystalline engineering plastics integrated nature. Its strength and high hardness, rigidity, and has good wear resistance and fatigue resistance, they have been used instead of non-ferrous metals and alloys are widely used in automotive, electronics, construction, machinery and other industries. Because high crystallinity of POM (generally more than 60% crystallinity), products gaps, low impact strength, mold shrinkage disadvantage with various other excellent properties do not match, further improvement. Improve the material properties of POM are mainly two methods: strict control of processing conditions and adding the nucleating agent. Found that the impact strength of polymer crystallinity and spherulite size and distribution. Experiments mainly through polyoxymethylene nucleating agent is added, changing the form of polyoxymethylene spherulites to reduce the crystal size and the process of forming shrinkage, improve the impact resistance, POM optimize performance, so that it can meet some special requirements.pigments
PP, PE, PS and other plastic in the manufacturing, processing, storage and use of the process, since the light \ oxygen, heat and other factors, the role of oxidative degradation often occurs, causing the plastic degradation, resulting in loss of weather resistance and durability of the plastic, the plastic effects strength and appearance. To prolong the life of polymer materials, inhibition or delay the oxidative degradation of the polymer, usually using antioxidants.

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