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A kind of rapid crystallization polyester material and its preparation method and application
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A polyester material, polyester technology, applied in the field of rapid crystallization polyester material and its preparation, can solve the problems of material mechanical properties decrease, ester polymer molecular weight decrease, etc., achieve low cost, good compatibility, realize industrial the effect of
Active Publication Date: 2022-02-15
JIANGNAN UNIV
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However, the presence of organic carboxylates will lead to a decrease in the molecular weight (degradation) of the ester polymer, resulting in a decrease in the mechanical properties of the material.
Method used
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Embodiment 1
[0068] In a 500mL three-neck flask, add 15mL of diethyl oxalate, 200mL of ethanol, and 45mL of ethanolamine, react at room temperature for 24h, filter to obtain the solid component, wash with ethanol several times, and then dry in a vacuum oven for 24h to obtain an organic nucleation compound for polyester Agent N 1 , N 2 - Bis(2-hydroxyethyl)oxamide, i.e.:
[0069]
[0070] Such as figure 1 Shown is the nuclear magnetic hydrogen spectrum of the nucleating agent obtained in this embodiment, 1 H NMR (400 MHz, DMSO) 8.5 (t, 2H), 4.75 (t, 2H), 3.45 (q, 4H), 3.21 (q, 4H). It is proved that the obtained product is indeed the nucleating agent represented by the above structural formula.
Embodiment 2
[0072] In a 500mL three-necked flask, add 15mL of diethyl oxalate, 200mL of ethanol, and 45mL of butanolamine, react at room temperature for 24 hours, filter to obtain the solid component, wash it with ethanol several times, and then dry it in a vacuum oven for 24 hours to obtain an organic compound for polyester. Nucleating agent N 1 , N 2 - Bis(4-hydroxybutyl)oxamide, namely:
[0073]
[0074] Such as figure 2 Shown is the nuclear magnetic hydrogen spectrum of the nucleating agent obtained in this embodiment, 1 H NMR(400MHz,DMSO)δ8.70(t,2H),4.39(t,2H),3.38(q,4H),3.13(q,4H),1.69(m,4H),1.45(m,4H) . It is proved that the obtained product is indeed the nucleating agent represented by the above structural formula.
Embodiment 3
[0076] In a 500mL three-neck flask, add 15mL of diethyl oxalate, 200mL of ethanol, and 45mL of ethanolamine, react at room temperature for 24 hours, filter to obtain the solid component, wash it with ethanol several times, and then dry it in a vacuum oven for 24 hours to obtain an organic compound for polyester. Nucleating agent N 1 , N 2 - Bis(6-hydroxyhexyl)oxamide, i.e.:
[0077]
[0078] Such as image 3 Shown is the nuclear magnetic hydrogen spectrum of the nucleating agent obtained in this embodiment, 1 H NMR (400MHz, DMSO) δ8.69(t,2H),4.33(t,2H),3.37(q,4H),3.11(q,4H),1.57–1.31(m,8H),1.31–1.08( m, 8H). It is proved that the obtained product is indeed the nucleating agent represented by the above structural formula.
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Abstract
The invention discloses a rapid crystallization polyester material and its preparation method and application, belonging to the technical field of polymer materials. The structural formula of the organic nucleating agent of the present invention is HO-R 1 ‑NH‑C(O)‑C(O)‑NH‑R 1 ‑O or HO‑R 2 ‑NH‑C(O)‑C(O)‑NH‑R 3 ‑NH‑C(O)‑C(O)‑NH‑R 2 ‑OH, which can be used to promote the rapid nucleation of polyester, has good compatibility with polyester polymers, can be uniformly dispersed in polymer melts, and can achieve thermodynamic compatibility even at high temperatures, and can pass through molecules during cooling The inter-hydrogen bond self-assembles to form crystals, adding a small amount can achieve the effect of rapid nucleation and crystallization, and can improve the crystallinity of the polymer; the obtained polyester material has the characteristics of high crystallization temperature, fast crystallization rate, and short semi-crystallization time. The molding cycle is shortened, the cost is reduced, the performance is improved, and the preparation method is simple, environment-friendly and easy to realize industrialization. It can be widely used in packaging, textiles, medical consumables, disposable plastic products or agricultural fields, and has broad prospects.
Description
technical field [0001] The invention relates to a rapid crystallization polyester material and its preparation method and application, belonging to the technical field of polymer materials. Background technique [0002] Polyester materials have a very broad application prospect in various fields due to their outstanding advantages such as environmental protection, wide source of raw materials, convenient processing, and light weight. However, polyester materials also have some inherent shortcomings (such as low material strength, poor heat resistance, and poor crystallization properties) that limit their wider development and application, especially as engineering materials. At present, there are mainly methods for improving the crystallization rate of polymers: blending methods, such as adding other high polymers (such as nylon) to improve crystallization properties. This method requires the introduction of high content of other polymer components which may change the orig...
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