Polyolefin/styrene series elastomer blending shape memory material and preparation method thereof

A technology of styrene-based and memory materials, which is applied in the field of shape memory polymer blend materials and its preparation, can solve the problems of high gel rate, material recycling and reprocessing difficulties, etc., achieve good mechanical properties, and be easy to popularize and apply , Excellent effect of memory performance

Inactive Publication Date: 2007-03-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Jiang Min et al. (Research on silane-crosslinked HDPE / TPI blended shape memory materials, Plastic Science and Technology, 2005, 2) chose HDPE as the main material, blended it with Eucommia gum (TPI) and prepared it by silane crosslinking. A chemically cross-linked blended shape memory material has been developed, which has excellent shape memory performance, but has a high gel rate, making recycling and reprocessing of the material difficult

Method used

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  • Polyolefin/styrene series elastomer blending shape memory material and preparation method thereof
  • Polyolefin/styrene series elastomer blending shape memory material and preparation method thereof
  • Polyolefin/styrene series elastomer blending shape memory material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0061] First add 60 parts of SEBS, 20 parts of polyethylene wax, 0.2 parts of DCP, and 5 parts of maleic anhydride into an ordinary internal mixer, raise the temperature to a melt temperature of 200°C, and blend for 5 minutes; then blend the obtained SEBS Add 40 parts of HDPE with a melt flow rate of 2 to 4g / 10min, 0.2 parts of DCP, and 3 parts of maleic anhydride to the compound, and continue to blend in an ordinary internal mixer at a melt temperature of 200 ° C for 8 minutes. , that is, get the SMPM. The melt flow rate is 1.5~15g / 10min

[0062] The shape recovery rate of the SMPM is 85-87%, the fixation rate is 85-87%, the tensile strength is 18-20MPa, the recovery time is 2-3s, the recovery response temperature is 33-35°C, and the gel rate is 3-5%.

Embodiment 2

[0064] First add 30 parts of SIS, 9 parts of oxidized polyethylene wax, 0.3 parts of AD, and 4 parts of maleic anhydride into the ordinary internal mixer, heat up to the melt temperature of 180 ° C, blend for 5 minutes and pelletize; then pelletize The blend of SIS and 70 parts of LDPE with a melt flow rate of 5-7g / 10min, 1 part of oxidized polyethylene wax, and 0.3 part of AD, premixed in a high-speed mixer, and then added to the twin-screw extruder , Blended at a melt temperature of 185°C for 2 minutes to obtain SMPM.

[0065] The shape recovery rate of the SMPM is 88-90%, the fixation rate is 85-87%, the tensile strength is 14-16MPa, the recovery time is 3-5s, the recovery response temperature is 63-65°C, and the gel rate is 5-7%.

Embodiment 3

[0067] Add 70 parts of SEBS, 30 parts of PP with a melt flow rate of 9-10g / 10min, 30 parts of polypropylene wax, 0.2 parts of DCP, and 3 parts of silane coupling agent into a high-speed mixer and pre-mix evenly, then add the twin-screw In the extruder, blend for 6 minutes at a melt temperature of 165° C. to obtain SMPM.

[0068] The shape recovery rate of the SMPM is 85-90%, the fixation rate is 88-89%, the tensile strength is 18-20MPa, the recovery time is 2-4s, the recovery response temperature is 33-35°C, and the gel rate is 1-3%.

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Abstract

The present invention discloses shape memory material of co-mixed polyolefin/styrene elastomer. The shape memory material contains polyolefin 20-80 weight portions, styrene elastomer 20-80 weight portions, plasticizer 10-30 weight portions, chemical crosslinking agent 0.1-1 weight portions and co-crosslinking agent 1-10 weight portions. It has tensile strength not lower than 12 MPa, gel rate not higher than 10 wt%, restoring rate at 100 deg.c 80 not lower than wt%, fixing rate at 20 deg.c not lower than 80 wt%, restoring response temperature not lower than 30 deg.c and restoring period not more than 6 sec. The present invention also discloses the preparation process of the shape memory material.

Description

technical field [0001] The invention belongs to the technical field of shape-memory polymer blend material and its preparation, and in particular relates to a polyolefin / styrene elastomer blend type shape-memory material and a preparation method. Background technique [0002] Shape memory polymer (SMP) is a new type of functional polymer material, which has broad application prospects in electronic communication, medical and health, machinery manufacturing, commodity identification, entertainment and sports, daily necessities, agriculture, energy and other fields. Since the 20th century Since the 1980s, it has aroused great interest and developed rapidly. Shape memory polymer materials are mainly obtained by modifying existing polymers or synthesizing new SMPs. [0003] Methods for modifying existing polymers to become SMPs include physical blending and chemical cross-linking blending. [0004] Jin He et al. (The thermally induced shape memory function of MAH-modified PE / P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/00C08L53/02C08J3/24C08K5/14C08K5/23B29C61/00
Inventor 吴智华孟兵
Owner SICHUAN UNIV
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