Method for synergistically regulating and controlling crystallization capacity and crystal form of 1-butene/ethylene random copolymer through multiple physical fields

• Main Authors: MA ZHE, ZHAO RUIJUN, LIU YINGZHUO, CHEN YOUXU
• Format: Patent
• Language: Chinese; English
• Published: 29.03.2024
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The invention provides a method for synergistically regulating and controlling the crystallization capacity and crystal form of a 1-butene/ethylene random copolymer through multiple physical fields, and belongs to the technical field of polymer crystallization. The method comprises the following steps: heating a 1-butene/ethylene random copolymer to a first temperature, carrying out heat preservation, and then cooling to obtain a standard crystal sample; heating the obtained standard crystallization sample to 120 DEG C, preserving the temperature of the sample for 10 minutes by utilizing a temperature field, cooling to an isothermal crystallization temperature, balancing the temperature for 2 minutes, and applying a flow field; the method provided by the invention overcomes the defect of weak crystallization capacity of the 1-butene/ethylene random copolymer, and can regulate and control the content of the stable crystal form when the crystallization is completed on the premise of not losing the crystallizati