Shape memory polymer blend materials

Patent metadata

Field	Value
Publication number	US-11124652-B2
Application number	US-201816014136-A
Country	US
Kind code	B2
Filing date	Jun 21, 2018
Priority date	Jun 21, 2017
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

An object comprising: a blend of (i) a phenol-containing polymer and (ii) a nitrile butadiene rubber; wherein the phenol-containing polymer is present in an amount of at least 5 wt % and up to about 95 wt % by total weight of components (i) and (ii). The object may further contain an electrically conducting component dispersed within the blend or on a surface of the blend. Also described is a method of thermal-activated reversible mechanical deformation of the object by (i) deforming the object at a first temperature, which is at or above the glass transition temperature of the object, and applying a stress on the object; (ii) fixing the deformed state by cooling the object to a second temperature of no more than 0° C. while under stress, and removing the stress; and (iii) recovering the object to the original shape by raising the temperature of the object to the first temperature.

First claim

What is claimed is:

1. An object comprising a blend of: (i) a phenol-containing polymer; (ii) a nitrile butadiene rubber; and (iii) substantially spherical particles having a zerovalent metal composition, wherein said particles are in admixed form within said blend or said particles are a coating on a surface of said object, wherein said blend defines a shape of said object;
wherein said phenol-containing polymer is present in an amount of at least 5 wt % and up to about 95 wt % by total weight of components (i) and (ii).

2. The object of claim 1 , wherein said phenol-containing polymer is a lignin.

3. The object of claim 2 , wherein said lignin is a softwood lignin.

4. The object of claim 2 , wherein said lignin is a hardwood lignin.

5. The object of claim 1 , wherein said nitrile butadiene rubber has an acrylonitrile content of 20-55 mol %.

6. The object of claim 1 , wherein said phenol-containing polymer is present in an amount of at least 20 wt % and up to about 70 wt % by total weight of components (i) and (ii).

7. The object of claim 1 , wherein said phenol-containing polymer is present in an amount of at least 40 wt % and up to about 60 wt % by total weight of components (i) and (ii).

8. The object of claim 1 , wherein said substantially spherical particles having a zerovalent metal composition reside on a surface of said blend that defines a shape of said object, without being within said blend.

9. The object of claim 1 , wherein said substantially spherical particles having a zerovalent metal composition are within said blend.

10. The object of claim 1 , wherein said substantially spherical particles having a zerovalent metal composition are present in an amount of up to 30 wt % by weight of components (i), (ii), and (iii).

11. The object of claim 1 , wherein said zerovalent metal composition is selected from the group consisting of silver (Ag), gold (Au), cobalt (Co), rhodium (Rh), iridium (Jr), nickel (Ni), palladium (Pd), platinum (Pt), copper (Cu), cadmium (Cd), aluminum (Al), tin (Sn), and combinations thereof.

12. The object of claim 1 , wherein said particles have a size of 1-200 nm.

Assignees

• Ut Battelle Llc

Inventors

• Naskar Amit K
• Nguyen Ngoc Anh

Classifications

• B29K2055/02

  ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers · CPC title

• B29C61/02

  Thermal shrinking · CPC title

• C08L2201/12

  Shape memory · CPC title

• C08L9/02

  Copolymers with acrylonitrile · CPC title

• B29K2055/00

  Use of specific polymers obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of main groups {B29K2023/00 - B29K2049/00, e.g. having a vinyl group}, as moulding material · CPC title