公开(公告)号：US09695258B2

公开(公告)日：2017-07-04

申请号：US14318736

申请日：2014-06-30

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Randy A. Mrozek ,  Joseph L. Lenhart ,  Michael C. Berg

IPC: C08F22/06 ,  C08F8/00

CPC classification number: C08F22/06 ,  C08F8/00

Abstract: Methods of adjusting the mechanical properties of a polymeric material may include forming a polymer network having a plurality of permanent cross-links and coupled to a plurality of reversible cross-links, wherein the polymer network has a shear storage modulus of greater than about 4×104 Pa; and heating the polymer network using a heat source to dissociate the reversible cross-links, wherein heating the polymer network reduces the shear storage modulus to less than about 4×104 Pa. In some embodiments, a polymeric material may include a polymer network comprising a plurality of permanent cross-links and coupled to a plurality of reversible cross-links that are dissociable with the application of a stimulus and associable with the removal of the stimulus, wherein the shear storage modulus of the polymer network is less than about 4×104 Pa in the presence of the stimulus and greater than about 4×104 Pa in the absence of the stimulus.

公开(公告)号：US20160030625A1

公开(公告)日：2016-02-04

申请号：US14445089

申请日：2014-07-29

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Randy A. Mrozek ,  Joseph L. Lenhart ,  Michael C. Berg ,  Eric J. Robinette

IPC: A61L24/00 ,  C08J9/26 ,  C08J9/28

CPC classification number: A61L24/0036 ,  A61L24/0015 ,  A61L2300/418 ,  A61L2400/04 ,  A61L2400/08 ,  C08J9/26 ,  C08J9/28 ,  C08J2201/0543 ,  C08J2207/10 ,  C08J2207/12 ,  C08J2353/02

Abstract: Porous polymer composites and methods of preparing porous polymer composites are provided herein. In some embodiments, a method for preparing porous polymer composites may include mixing a first polymer with a solvent and a particulate filler to form a first polymer composition, wherein the amount of particulate filler in the first polymer composition is below a mechanical percolation threshold; and removing the solvent from the first polymer composition to concentrate the first polymer and particulate filler into a second polymer composition having a porous structure, wherein the particulate filler concentration in the second polymer composition is increased above the mechanical percolation threshold during solvent removal.

Abstract translation: 多孔聚合物复合材料和多孔聚合物复合材料的制备方法。 在一些实施方案中，制备多孔聚合物复合材料的方法可包括将第一聚合物与溶剂和颗粒填料混合以形成第一聚合物组合物，其中第一聚合物组合物中颗粒填料的量低于机械渗滤阈值; 以及从所述第一聚合物组合物中除去溶剂以将所述第一聚合物和颗粒填料浓缩成具有多孔结构的第二聚合物组合物，其中在除去溶剂期间所述第二聚合物组合物中的颗粒填料浓度高于机械渗透阈值。

公开(公告)号：US10369248B2

公开(公告)日：2019-08-06

申请号：US14445089

申请日：2014-07-29

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Randy A. Mrozek ,  Joseph L. Lenhart ,  Michael C. Berg ,  Eric J. Robinette

IPC: C08J9/26 ,  C08J9/28 ,  A61L24/00

Abstract: Porous polymer composites and methods of preparing porous polymer composites are provided herein. In some embodiments, a method for preparing porous polymer composites may include mixing a first polymer with a solvent and a particulate filler to form a first polymer composition, wherein the amount of particulate filler in the first polymer composition is below a mechanical percolation threshold; and removing the solvent from the first polymer composition to concentrate the first polymer and particulate filler into a second polymer composition having a porous structure, wherein the particulate filler concentration in the second polymer composition is increased above the mechanical percolation threshold during solvent removal.

公开(公告)号：US20150376304A1

公开(公告)日：2015-12-31

申请号：US14318736

申请日：2014-06-30

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Randy A. Mrozek ,  Joseph L. Lenhart ,  Michael C. Berg

IPC: C08F22/06 ,  C08F8/00

CPC classification number: C08F22/06 ,  C08F8/00

Abstract: Methods of adjusting the mechanical properties of a polymeric material may include forming a polymer network having a plurality of permanent cross-links and coupled to a plurality of reversible cross-links, wherein the polymer network has a shear storage modulus of greater than about 4×104 Pa; and heating the polymer network using a heat source to dissociate the reversible cross-links, wherein heating the polymer network reduces the shear storage modulus to less than about 4×104 Pa. In some embodiments, a polymeric material may include a polymer network comprising a plurality of permanent cross-links and coupled to a plurality of reversible cross-links that are dissociable with the application of a stimulus and associable with the removal of the stimulus, wherein the shear storage modulus of the polymer network is less than about 4×104 Pa in the presence of the stimulus and greater than about 4×104 Pa in the absence of the stimulus.

Abstract translation: 调整聚合物材料的机械性能的方法可包括形成具有多个永久性交联并且耦合到多个可逆交联的聚合物网络，其中聚合物网络的剪切储能模量大于约4× 104 Pa; 并且使用热源加热聚合物网络以解离可逆交联，其中加热聚合物网络将剪切储能模量降低到小于约4×10 4 Pa。在一些实施方案中，聚合物材料可以包括聚合物网络，其包含 多个永久性交联并且耦合到多个可逆交联，其可通过施加刺激而解离并与去除刺激相关联，其中聚合物网络的剪切储能模量小于约4×10 4 Pa，在没有刺激的情况下大于约4×104Pa。