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Polyester tackifying/nucleating special auxiliary agent, preparation thereof and application thereof in PET modification

A technology of polyester and nucleation, which is applied in the field of polyester viscosifying/nucleating special additives and its preparation and application in PET modification, which can solve the problems of long injection molding cycle, low crystallization rate, and few injection molding, etc. problems, to achieve low cost, improve molding performance, improve mechanical properties and heat resistance

Active Publication Date: 2019-08-27
ZHEJIANG JINLIDA NEW MATERIAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the other hand, although PET is cheap, it is rarely used for injection molding except for preforms due to its low crystallization rate and long injection cycle

Method used

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  • Polyester tackifying/nucleating special auxiliary agent, preparation thereof and application thereof in PET modification
  • Polyester tackifying/nucleating special auxiliary agent, preparation thereof and application thereof in PET modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 240mL deionized water, 60mL industrial alcohol, 30g SiO 2 (Wanjing New Materials Co., Ltd., VK-SP30), 0.261g γ-(2,3-epoxypropoxy)propyltrimethoxysilane (KH-560) (Aladdin Shanghai Biochemical Co., Ltd.), 0.710g Octyltriethoxysilane (KH-832) (Aladdin Shanghai Biochemical Co., Ltd.) (the mol ratio of the two siloxanes is 3:7), mix well under mechanical stirring, then adjust the pH with 10wt% dilute hydrochloric acid When the value reaches 4, stir at room temperature for 6 h to obtain a nanoslurry with a solid content of 10 wt%. The obtained nano-slurry is centrifuged (10000rpm, desktop high-speed centrifuge, H / T16MM, Hunan Hexi Instrument Equipment Co., Ltd.), and the precipitate obtained by centrifugation is dried at 80°C for 12h in a blast oven to obtain modified nano-SiO 2 particles.

[0041] The obtained modified nano-SiO 2The granules are added to PET (Wahaha pure water bottle material), the added amount is 1wt% of the PET amount, mixed evenly, added to the torque ...

Embodiment 2

[0047] Other is the same as embodiment 1, but will modify nano-SiO 2 The amount of particles added to PET was changed to 2wt% to obtain modified PET, and the effect of thickening and inducing crystallization was measured. The results show that the intrinsic viscosity number of PET increases from 0.45 to 0.96, and the viscosity increasing effect is obvious. The crystallinity increased from 34.7% to 37.7%.

Embodiment 3

[0055] Others are the same as in Example 1, but the method for preparing the nano-slurry is changed to: Pour the slurry adjusted with dilute hydrochloric acid into a planetary ball mill (Nanjing University Instrument Factory, QM-3SP2) for ball milling, and the ball milling condition is: zirconium beads with a diameter of 0.5 mm, mass 350g, rotational speed 350rpm, ball milling time 5h, to obtain nano-slurry, after spray drying (190°C, slurry inlet rate 5mL / min), modified nano-SiO 2 Granules, after melting and mixing with PET, measured PET viscosity and induced crystallization effects. The results show that the intrinsic viscosity number of PET increases from 0.45 to 0.98, and the viscosity-increasing effect is obvious. The crystallinity increased from 34.7% to 37.2%.

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Abstract

The invention discloses a polyester tackifying / nucleating special auxiliary agent, preparation thereof and application thereof in PET modification. The polyester tackifying / nucleating special auxiliary agent is inorganic nonmetal particles with functional groups and short-chain alkyl groups on the surfaces, wherein the inorganic nonmetal particles are obtained by conducting surface modification oninorganic nonmetal particles through a silane coupling agent; the silane coupling agent is composed of at least one silane coupling agent with the function groups at the terminals and at least one silane coupling agent with the short-chain alkyl groups at the terminals, the functional groups are groups capable of reacting with -OH or -COOH at polyester molecular chain terminals, and the carbon number of the short-chain alkyl groups is 3-8; the surfaces of the inorganic nonmetal particles contain hydroxyl groups or carboxyl groups, and the particle size of the inorganic nonmetal particles is within the range of 10-200 nm. By means of the auxiliary agent, polyester tackifying and induced crystallization nucleation can be achieved simultaneously. The invention further provides a PET modification method which is simple, low in cost and capable of achieving PET tackifying and induced crystallization nucleation simultaneously.

Description

[0001] (1) Technical field [0002] The invention relates to a special auxiliary agent for polyester viscosification / nucleation, a preparation method thereof and an application in modification of polyethylene terephthalate (PET). [0003] (2) Background technology [0004] PET is a general-purpose engineering plastic with low cost and excellent performance. Especially with the growing beverage consumption market, there are a lot of PET waste in the society, which urgently needs to be recycled and reused. However, the molecular chains of PET are often torn during extrusion and injection molding, especially after being exposed to the sun and rain, its molecular weight is significantly reduced, and its mechanical properties are significantly reduced. In order to reuse, especially industrial reuse (non-common civilian use), its molecular weight must be increased, that is, chain extension and viscosity increase. [0005] On the other hand, although PET is cheap, it is rarely used f...

Claims

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Application Information

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IPC IPC(8): C08K9/06C08K3/36C08K3/22C08L67/02
CPCC08K3/22C08K3/36C08K9/06C08K2003/2241C08K2201/011C08L2201/08C08L2205/24C08L2207/20C08L67/02
Inventor 金文钟冯杰包爱军裴磊邵峰张永雷
Owner ZHEJIANG JINLIDA NEW MATERIAL TECH CO LTD
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