Patents by Inventor Zhengjie Pi

Zhengjie Pi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6831133
    Abstract: The preparation of allylated poly(vinyl chloride) by utilizing an allyltrialkylsilane in the presence of Friedel-Crafts acids is disclosed. The pendant allyl groups can be further reacted through various functionalization reactions to contain end groups such as epoxy and hydroxyl. Alternatively, an unsaturated group can be added to poly(vinyl chloride) utilizing a diene also in the presence of a Friedel-Crafts acid. These pendant groups can also be reacted to contain functional end groups such as hydroxyl and epoxy. In yet a further embodiment, the functionalized end groups such as pendant —OH groups of both the allylated and diene grafted poly(vinyl chloride) are further reacted with other monomers or polymer chains which thus results in a poly(vinyl chloride) chain having pendant monomers or polymers. These compositions are useful as compatibilizers for poly(vinyl chloride) and various other resins.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: December 14, 2004
    Assignee: The University of Akron
    Inventors: Joseph P. Kennedy, Zhengjie Pi
  • Patent number: 6727321
    Abstract: The preparation of allylated poly(vinyl chloride) by utilizing an allyltrialkylsilane in the presence of Friedel-Crafts acids is disclosed. The pendant allyl groups can be further reacted through various functionalization reactions to contain end groups such as epoxy. A method for determination of the labile chlorine content of poly(vinyl chloride) is also disclosed.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: April 27, 2004
    Assignee: University of Akron
    Inventors: Joseph P. Kennedy, Zhengjie Pi
  • Publication number: 20020061973
    Abstract: The preparation of allylated poly(vinyl chloride) by utilizing an allyltrialkylsilane in the presence of Friedel-Crafts acids is disclosed. The pendant allyl groups can be further reacted through various functionalization reactions to contain end groups such as epoxy and hydroxyl. Alternatively, an unsaturated group can be added to poly(vinyl chloride) utilizing a diene also in the presence of a Friedel-Crafts acid. These pendant groups can also be reacted to contain functional end groups such as hydroxyl and epoxy. In yet a further embodiment, the functionalized end groups such as pendant—OH groups of both the allylated and diene grafted poly(vinyl chloride) are further reacted with other monomers or polymer chains which thus results in a poly(vinyl chloride) chain having pendant monomers or polymers. These compositions are useful as compatibilizers for poly(vinyl chloride) and various other resins.
    Type: Application
    Filed: December 8, 2000
    Publication date: May 23, 2002
    Applicant: University of Akron
    Inventors: Joseph P. Kennedy, Zhengjie Pi
  • Patent number: 6384147
    Abstract: A grafted poly(vinyl chloride) having at least one pendant chain which comprises poly(&agr;-methylstyrene). The graft copolymer has only a single glass transition temperature of from about 100° C. to about 130° C. The poly(vinyl chloride)-g-poly(&agr;-methylstyrene) can be utilized as a high heat distortion poly(vinyl chloride) material, as the single glass transition temperature is considerably higher than that of homopolymer poly(vinyl chloride). The molecular weight of the pendant poly(&agr;-methylstyrene) chain is less than about 10,500 g/mol number average.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: May 7, 2002
    Assignee: University of Akron
    Inventors: Joseph P. Kennedy, Zhengjie Pi