Accession Number : ADA310404

Title :   Synthesis of Ultrahigh Molecular-Weight Poly(ethylene Terephthalate).

Descriptive Note : Technical note,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER

Personal Author(s) : Hsu, Li-Chen

PDF Url : ADA310404

Report Date : JAN 1968

Pagination or Media Count : 16

Abstract : This study was conducted to synthesize poly(ethylene terephthalate) or PET of number-average molecular weight of the order of 120 000. PET of number-average molecular weight of the order of 120 000 was prepared with a gas chromatograph apparatus through solid-state polymerization technology. PET particles were packed in the column, heated to a temperature somewhat below the melting temperature, and flushed with a carrier gas until the desired molecular weight was reached. Parameters studied were the catalyst, the particle size, the molecular weight of the starting material, the reaction temperature and time, and the flow rate and nature of the carrier gas.

Descriptors :   *SYNTHESIS, *MOLECULAR WEIGHT, *POLYETHYLENE TEREPHTHALATE, PARTICLE SIZE, TEMPERATURE, MATERIALS, POLYMERIZATION, GASES, FLOW RATE, CATALYSTS, MELTING POINT, SOLID STATE CHEMISTRY, GAS CHROMATOGRAPHY.

Subject Categories : Polymer Chemistry
      Organic Chemistry
      Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE