Self-assembled calixarene nucleating agent and application thereof in polylactic resin composition

Abstract

The invention relates to a self-assembled calixarene nucleating agent and an application thereof in a polylactic resin composition. The self-assembled calixarene nucleating agent is a supermolecular nucleating agent self-assembled by the below A and B, wherein A is calixarene and derivatives thereof expressed by structural formula A while B consists of one or more organic micromolecular compounds as follows: C1-C30 alkane, C1-C30 halogenated alkane, C1-C30 alcohol, C1-C30 nitrile, a 5-6 membered heterocyclic compound, substituted 5-6 membered heterocyclic compound (substituent can be hydroxyl, aldehyde group and alkyl), benzene, naphthalene, substituted benzene and substituted naphthalene. The invention has the advantages of simple production process, relative low cost and great nucleating speed, thereby overcoming the low crystallization rate of polylactic resin and reducing the processing and forming period.

Description

【Technical field】 [0001] The invention relates to the technical field of polylactic acid nucleating agents, in particular to a self-assembled calixarene nucleating agent and its application in polylactic acid resin compositions. 【Background technique】 [0002] Polylactic acid is a renewable biodegradable material with good biocompatibility. Polylactic acid is non-toxic, degradable, renewable, and meets the requirements of environmental protection and sustainable development, so it has attracted more and more attention from material researchers and business people. Polylactic acid has good mechanical properties, thermoplasticity, fiber formation, and high transparency. It is suitable for various processing methods such as blow molding and thermoplastic, and is easy to process. It is defined by the industry as the most promising new material in the new century. However, as an engineering plastic application, polylactic acid has the disadvantages of slow crystallization rate, ...

AI Technical Summary

Problems solved by technology

[0003] Chinese Patent Publication No. CN101054463A relates to a preparation method of a rapid crystallization polylactic acid composite material. The method of the present invention uses lactic acid as a raw material or lactide as a raw material, and mixes a nano-nucleating agent for melt polycondensation. The polylactic acid / nano-nucleating agent composite material is obtained; the crystallization rate of the composite material is greatly improved compared with the pure polylactic acid material, and the nano-scale metal oxide is used, but after adding it to the polylactic acid, the crystallization rate is still low

However, since the crystallization nucleating agent is a compound monomer with a smaller molecular weight, when it forms ester pellets with polylactic acid but has not yet been made into a molded body, it is easy to lose from the ester pellets during storage or transmission, and loses the ability to promote crystallization nucleation. Moreover, after the shape is made, because the molecular weight of the nucleating agent is small, it is easy to escape from the shaped body, and the articles packaged in the shaped body are polluted by the escaping crystal nucleating agent , so it is not suitable for food packaging containers

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