1 Ocak 1997 Dergi makalesi Açık Erişim

Ozarslan, O; Yilmaz, T; Yildiz, E; Fiedeldei, U; Kuyulu, A; Gungor, A

Citation Style Language JSON

{
  "URL": "https://aperta.ulakbim.gov.tr/record/104147", 
  "abstract": "The synthesis of N,N'-bis(4'-amino-4-biphenylene) isophthalamide (BABPI) and its applicability as a new diamine for the preparation of a series of new, high T-g, perfectly alternating poly(amide-imide)s is described. BABPI was synthesized from the catalytic reduction of the corresponding dinitro compound which was prepared by the condensation of isophthaloyl chloride and 4-amino-4'-nitrobiphenyl. The modified selective reduction technique was used for the preparation of 4-amino-4'-nitrobiphenyl from 4,4'-dinitro-biphenyl. Poly(amide-imide)s were synthesized by polycon densation of diamine BABPI with various commercially available aromatic dianhydrides via a conventional two-step procedure. In the first step, poly(amic-acid)s were prepared in a polar aprotic solvent, such as N-methyl pyrrolidone (NMP) at room temperature. Depending on the dianhydride used, intrinsic viscosities of poly(amic-acid)s were found to range between 0.43-0.69 dL/g. Bulk thermal imidization technique was used to obtain fully imidized poly(amide-imide)s at the second step. The synthesized poly(amide-imide)s showed good thermal stability up to 320 degrees C and the 10% weight loss temperatures were recorded in the range of 525-550 degrees C as evidenced by thermogravimetric analysis (TGA). The glass transition temperatures were found to be between 225-235 degrees C from differential scanning calorimeter (DSC) measurements. (C) 1997 John Wiley & Sons, Inc.", 
  "author": [
    {
      "family": "Ozarslan", 
      "given": " O"
    }, 
    {
      "family": "Yilmaz", 
      "given": " T"
    }, 
    {
      "family": "Yildiz", 
      "given": " E"
    }, 
    {
      "family": "Fiedeldei", 
      "given": " U"
    }, 
    {
      "family": "Kuyulu", 
      "given": " A"
    }, 
    {
      "family": "Gungor", 
      "given": " A"
    }
  ], 
  "container_title": "JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY", 
  "id": "104147", 
  "issue": "6", 
  "issued": {
    "date-parts": [
      [
        1997, 
        1, 
        1
      ]
    ]
  }, 
  "page": "1149-1155", 
  "title": "The preparation of perfectly alternating poly(amide-imide)s via amide unit containing new diamine", 
  "type": "article-journal", 
  "volume": "35"
}