Preparation method of novel medical macromolecular material

Abstract

The invention relates to a preparation method of a novel medical macromolecular material. The preparation method comprises the following steps: (1) opening a plastic high-speed mixer to mix 60-80 parts by weight of polypropylene and 10-20 parts by weight of butadiene styrene rubber at a high speed for 40min, wherein the rotating speed of the plastic high-speed mixer is 30-60r / min; (2) then putting 30-40 parts by weight of nanoscale light ground calcium carbonate powder and 20-40 parts by weight of a developing agent into the plastic high-speed mixer to mix at a high speed, wherein the rotating speed is 30-60r / min; and (3) performing twin screw extrusion on the uniformly mixed material, wherein the twin screw extrusion temperature intervals are separately as follows: 120-130 DEG C for a first region, 140-150 DEG C for a second region, 160-170 DEG C for a third region, 180-190 DEG C for a fourth region and 190-200 DEG C for a fifth region; and after extrusion, prilling to obtain the medical macromolecular material. The preparation method disclosed by the invention has the advantages that after adding an additive, some mechanical properties of the macromolecular material can be improved, and the rigidity and toughness of the polypropylene medical macromolecular material are improved.

Description

technical field [0001] The invention belongs to the field of new medical materials, in particular to a preparation method of a novel medical polymer material. Background technique [0002] Medical polymer materials are intended to be directly used on the human body or closely related to human health, so there are strict requirements for materials entering the clinical use stage: [0003] Performance requirements for medical polymer materials: biological aging resistance, stable physical and mechanical properties, easy processing and molding, readily available materials, and reasonable prices. [0004] Requirements for human body effects of medical polymer materials: non-toxic, non-pyrogenic, non-carcinogenic, non-teratogenic, not causing allergic reactions or interfering with the immune mechanism of the body, not destroying adjacent tissues, and not causing calcification on the surface of the material. The contact materials are required to have good blood compatibility and ...

AI Technical Summary

Problems solved by technology

However, polypropylene also has obvious disadvantages: low impact strength, poor toughness, the toughness is further reduced after adding developer, and the thin wall is prone to cracks or fractures during use.

Conventional polypropylene toughening modification methods such as adding polymer toughening agents can improve the toughness of polypropylene, but the rigidity of polypropylene will be lost, resulting in a sharp decrease in material modulus. It is necessary to add certain reinforcing fillers to polypropylene. Conventional reinforcement Agents such as glass fiber and talc cannot be used due to biosafety and other concerns