Modified PET material and preparation method thereof
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A modification and raw material technology, applied in the field of modified PET materials and their preparation, can solve the problems of hindering the movement of molecular segments, high glass transition temperature, difficult molding and processing, etc., to reduce the two-phase interface energy, improve the adhesion, The effect of improving mechanical properties
Active Publication Date: 2021-04-13
宁波东诚日用塑料制品有限公司
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[0003] PET has excellent wear resistance, heat resistance and chemical resistance. These properties are endowed by its rigid structure with benzene rings, but it is precisely because of the existence of this rigid structure that its molecular chains are relatively flexible. Poor, the glass transition temperature is high, which hinders the movement of molecular segments, so the crystallization rate is slow, which further causes problems such as difficult molding processing, high molding temperature, long production cycle, and poor impact performance.
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Embodiment 1
[0044] A preparation method of a modified PET material, comprising the following preparation steps:
[0045]A1. Weigh the following raw materials by weight: 75kgPET, 15kgPA66, 5kgPEN, 0.1kg antioxidant 1010, 5kg kaolin, 7.5kgPP-g-MAH, 1.0kg2-methyl-2 acrylate-2 hydroxyethyl phosphate, 2kg glass fiber;
[0046] A2. Put the weighed PET, PA66, PP-g-MAH, 2-methyl-2 acrylate-2 hydroxyethyl phosphate into the mixer and mix, then add antioxidant, PEN, kaolin and mix Mixture A is obtained;
[0047] A3. Mix the mixture A with the glass fiber drawn in through the side inlet of the extruder to obtain the mixture B;
[0048] A4, the mixture B is extruded and pelletized through an extruder to obtain modified PET pellets;
[0049] A5. The modified PET pellets are made into modified PET splines through an injection molding machine.
[0050] Among them, the extruder is a twin-screw extruder, and the twin-screw extruder can be divided into six zones between the feeding port and the tempera...
Embodiment 2-5
[0052] The preparation method of the modified PET material of embodiment 2-5 is identical with embodiment 1, and difference only is as shown in table 1:
[0053] Raw material composition and consumption of table 1 embodiment 1-5 modified PET material
[0054]
[0055]
Embodiment 6
[0057] The preparation method of the modified PET material in Example 6 is the same as that in Example 1, except that the compatibilizer is maleic anhydride grafted EPDM.
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Abstract
The invention relates to the field of high polymer materials, and particularly discloses a modified PET material and a preparation method thereof. The modified PET material is prepared from the following components in parts by weight: 70-80 parts of PET, 15-20 parts of PA66, 0.1-0.2 part of antioxidant, 3-7 parts of inorganic filler, 7-8 parts of compatibilizer and 0.8-1.5 parts of coupling agent. The preparation method comprises the following steps: putting the PET, the PA66, the compatibilizer and the coupling agent into a mixer for mixing, adding the antioxidant, the PEN and the inorganic filler, and mixing to obtain a mixture A; mixing the mixture A with glass fibers which are dragged into the extruder through a side inlet of the extruder to obtain a mixture B; and extruding the mixture B by the extruder, and granulating to obtain modified PET granules. The modified PET material provided by the invention can be used for engineering plastics, and has the advantage of improving the crystallization rate of PET so as to broaden the application of PET in the field of engineering plastics.
Description
technical field [0001] The application relates to the field of polymer materials, more specifically, it relates to a modified PET material and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is an aromatic crystalline polymer with high elastic modulus and impact strength, excellent high temperature resistance and solvent resistance, non-toxic, tasteless, And at the same time have good gas barrier properties. PET can be widely used in the fields of fiber, film, food and beverage packaging and engineering plastics, and its usage is second only to polyolefin in the world. [0003] PET has excellent wear resistance, heat resistance and chemical resistance. These properties are endowed by its rigid structure with benzene rings, but it is precisely because of the existence of this rigid structure that its molecular chains are relatively flexible. Poor, the glass transition temperature is high, which hinders the movement of molecular s...
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