A kind of polycarbonate composite material with high strength, low mold temperature and low floating fiber and preparation method thereof
A technology of polycarbonate and composite materials, which is applied in the field of polymer materials and can solve problems such as limited effects
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[0035] One implementation method, a high-strength, low-mold temperature, low-floating fiber polycarbonate composite material, in parts by weight, comprising the following components: 40-90 parts of polycarbonate, 10-60 parts of modified glass fiber, and antioxidant 0.1-0.5 parts, toughening agent 1-6 parts.
[0036] The modified glass fiber is hyperbranched polyimide modified glass fiber, and in parts by weight, it includes 100 parts of glass fiber, 0.1-1 part of coupling agent, 0.5-5.0 part of hyperbranched polyimide, and an appropriate amount. 3-methoxypropionic acid is obtained by reaction.
[0037]Further, the modified glass fiber is a hyperbranched polyimide modified glass fiber, in parts by weight, including 100 parts of glass fiber, 0.5 parts of coupling agent, 0.5-3.0 parts of hyperbranched polyimide, An appropriate amount of 3-methoxypropionic acid was obtained by reaction.
[0038] Further, the modified glass fiber specifically comprises the following steps to prep...
Embodiment approach
[0039] In one embodiment, the glass fiber is preferably an alkali-free short glass fiber with a diameter of 5-14 μm. For example, ECS307-3 of Chongqing International Composite Materials Co., Ltd. can be used.
[0040] In one embodiment, the coupling agent may be at least one of KH-792, KH-550, KH-602, KH-560, HD-A171 and the like. In order to better compare the technical effects, coupling agent KH550 is used in the following examples. It should be noted that in the present invention, the surface of the glass fiber is first modified by using a coupling agent, and then combined with the hyperbranched polyimide, and the glass fiber and the hyperbranched polyimide are combined by the coupling effect of the coupling agent. up, so as to achieve modified glass fiber. Therefore, those skilled in the art can replace and use similar coupling agents according to the above-mentioned principles, which should also fall within the protection scope of the present invention.
[0041] In one...
Embodiment 1
[0053] (1) Preparation of hyperbranched polyimide modified glass fiber: in parts by weight, it consists of 100 parts of glass fiber, 0.5 part of coupling agent, 0.5 part of hyperbranched polyimide, 3-methoxypropionic acid 1 reaction was obtained.
[0054] Specifically, the preparation method includes the following steps: soak the glass fiber in an aqueous solution containing 1wt% coupling agent for 20min, take it out and cure it at 110°C for 30min, and then dry it at 120°C for 3h; add it to 1wt% hyperbranched polyimide The DMF solution was heated to 150°C for 3 hours, and then 3-methoxypropionic acid was added to continue the reaction for 1 hour to obtain hyperbranched polyimide modified glass fibers.
[0055] (2) Preparation of high-strength, low-mold temperature and low-floating fiber polycarbonate composite material: in parts by weight, including the following components: 90 parts of polycarbonate, 10 parts of modified glass fibers prepared in step (1), Oxygen agent 0.2 pa...
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