Method for producing partial fluorine ethylene polymer
Through the polymerization method of adding initiators intermittently in batches, the problem of unsuitable molecular weight distribution in the existing technology is solved, and the preparation of unimodal or bimodal vinylidene fluoride homopolymers or copolymers suitable for the fields of films and electronics is realized. , meeting the molecular weight distribution requirements for specific applications.
Patent Information
- Application Number
- CN200610119030.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2006-12-04
- Publication Date
- 2008-06-11
- Estimated Expiration
- 2026-12-04
AI Technical Summary
It is difficult to obtain unimodal or bimodal vinylidene fluoride homopolymers or copolymers with moderate molecular weight distribution under the premise of ensuring the required weight average molecular weight, especially in applications in the fields of thin films and electronics and electrical fields. Inappropriate questions.
A polymerization method is adopted in which the initiator is added intermittently in batches. The remaining initiator is added in batches according to the proportion of the initial addition amount, and the reaction pressure and temperature are controlled to ensure that the initiator concentration in the polymerization reaction fluctuates within an appropriate range, thereby controlling the molecular weight distribution.
It has achieved a vinylidene fluoride homopolymer or copolymer with moderate unimodal or bimodal molecular weight distribution under the condition of ensuring a certain weight average molecular weight. It is suitable for film and electronic and electrical fields, and the melt flow rate and primary particle size of the product are within Within the appropriate range, the solvent dissolving ability is improved.