公开(公告)号：US20240392097A1

公开(公告)日：2024-11-28

申请号：US18695210

申请日：2022-09-24

Applicant: Virginia Tech Intellectual Properties, Inc.

Inventor： Guoliang LIU ,  Zhen XU

IPC: C08J11/20 ,  C08J3/205

Abstract: A method of converting polystyrene to diphenylmethane using either UV light and or heat and a Lewis acid is disclosed.

公开(公告)号：US20240239977A1

公开(公告)日：2024-07-18

申请号：US18549998

申请日：2022-03-04

Applicant: VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

Inventor： Guoliang LIU ,  Zhen XU ,  Alan Roger ESKER ,  Gehui LIU

IPC: C08J5/18 ,  C08G73/10 ,  C08J3/24

CPC classification number: C08J5/18 ,  C08G73/1071 ,  C08J3/24 ,  C08J2379/08

Abstract: In one aspect, the disclosure relates to azide-containing poly(ether imide) polymers (PEIs; N3-PEI-N3) synthesized via a heterogenous diazotizationazidation reaction. In one aspect, the azide-containing PEIs can be solution-cast into films and then thermally crosslinked. In a further aspect, the crosslinked PEIs (X-PEIs) exhibit superior thermal and mechanical properties. In a still further aspect, X-PEIs display outstanding resistance to classical solvents for conventional PEI, including THF, DCM, chloroform, DMF, and NMP. In another aspect, with an initial number average molecular weight (Mn) of 8.9 kDa, the disclosed azide-containing PEIs have a high crosslinking density and thus possess desirable thermal, mechanical, and solvent resistance properties.