Method for improving molecular weight of natural rubber and product

• Main Authors: KANG GUIJUAN, ZENG RIZHONG, TAN HUAIDE, NIE ZHIYI
• Format: Patent
• Language: Chinese; English
• Published: 03.01.2023
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; TESTING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS

The invention discloses a method for increasing the molecular weight of natural rubber and a product. The method comprises the following steps: collecting rubber tree latex, keeping low temperature by using ice cubes, adding an isotonic solution into the latex, and fully and uniformly mixing; under the low-temperature condition, rubber particles with different particle sizes are subjected to grading separation through a differential centrifugal method, complete grading separation of the rubber particles is achieved, meanwhile, the particle sizes of the rubber particles obtained through differential centrifugal separation are detected in real time through a laser scattering particle size distribution analyzer, and the rubber particle size detection accuracy is improved. And parameters such as centrifugal force and time can be quickly adjusted according to requirements to obtain the required molecular weight and particle size, and the molecular weight of natural rubber is improved. The centrifugal process is si