Preparation method of low-mould shrinkage ratio polypropylene alloy material
A technology of alloy material and polypropylene, which is applied in the field of preparation of polypropylene alloy materials, can solve the problems of reducing PP molding shrinkage, achieve the goal of reducing PP molding shrinkage, realizing general plastic engineering, and good compatibility Effect
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Embodiment 1
[0043] In this embodiment, it is assumed that SIS products with a molecular weight of 100,000 to 130,000 are produced, and the styrene content is 15%. The volume of cyclohexane used is 60% of the total volume of the reactor, the dosage of tetrahydrofuran is 81ppm, the total monomer dosage of styrene and isoprene is 15% of the total mass of the reaction system, and the dosage of the terminator is the initiator. 1.2 times the total amount, the amount of antioxidant is 500ppm. The amount of impurity-breaking initiator is 20ppm, and the amount of initiator is according to formula I: m Initiator =64.06×m / (Mn×C)
[0044] Where m Initiator Is the mass of the initiator; m is the mass of styrene and isoprene monomers; Mn is the average molecular weight of the designed SIS; C is the mass percentage concentration of the initiator.
[0045] The production of SIS products is completed in a 10L reactor, and the amount of each component is calculated according to the requirements of the above re...
Embodiment 2
[0051] In this embodiment, it is assumed that SIS products with a molecular weight of 100,000 to 130,000 are produced, and the styrene content is 18%. The volume of cyclohexane used is 60% of the total volume of the reactor, the dosage of tetrahydrofuran is 81ppm, the total monomer dosage of styrene and isoprene is 15% of the total mass of the reaction system, and the dosage of the terminator is the initiator. 1.2 times the total amount, the amount of antioxidant is 750pm. The amount of impurity-breaking initiator is 25ppm, and the amount of initiator is based on formula I: m Trigger Agent =64.06×m / (Mn×C)
[0052] Where m Initiator Is the mass of the initiator; m is the mass of styrene and isoprene monomers; Mn is the average molecular weight of the designed SIS; C is the mass percentage concentration of the initiator.
[0053] The production of SIS products is completed in a 10L reactor, and the amount of each component is calculated according to the requirements of the above ...
Embodiment 3
[0059] In this embodiment, it is assumed that SIS products with a molecular weight of 100,000 to 130,000 are produced, and the styrene content is 20%. The volume of cyclohexane used is 60% of the total volume of the reactor, the dosage of tetrahydrofuran is 81ppm, the total monomer dosage of styrene and isoprene is 15% of the total mass of the reaction system, and the dosage of the terminator is the initiator. 1.2 times the total amount, the amount of antioxidant is 1000 pm of the total amount of initiator. The amount of impurity-breaking initiator is 30ppm, and the amount of initiator is according to formula I: m Initiator =64.06×m / (Mn×C)
[0060] Where m Initiator Is the mass of the initiator; m is the mass of styrene and isoprene monomers; Mn is the average molecular weight of the designed SIS; C is the mass percentage concentration of the initiator.
[0061] The production of SIS products is completed in a 10L reactor, and the amount of each component is calculated according t...
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