PHYSICAL PROPERTIES OF SILICONE GRAFTED COTTON FABRICS

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  • シリコーングラフト綿布の物理的性質
  • シリコーングラフト メンプ ノ ブツリテキ セイシツ

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Abstract

Cotton fabrics were irradiated with methyl hydrogen siloxane polymer by 60Co γ-rays at the room temperature in the air, at the dose rate of 2.4×105 rad/hr. and the total dose of 0.7_??_4.7 Mrad. After irradiation the samples were heated at 80°C for 20 hrs., and then they were extracted with benzene for 25 hrs.<br>In this study the physical properties of the silicone grafted cotton fabrics (I) were investigated and compared with those of the silicone coated cotton fabrics (II) or the irradiated cotton fabrics (III). The following experimental results were obtained: <br>(1) Tensile strength of I decreased much more than that of III at the same irradiation dose, or than that of II at the same contents of silicone. Tensile strength of I decreased to about 30% at the irradiation of about 2 Mrad.<br>(2) Flex abrasion strength of about 5% grafted I was about 5 times larger than that of the original cotton fabrics, but that of III decreased slightly and that of II increased slightly.<br>(3) Load-elongation curves of I and III were exhibited two yield points which were not observed at the curves of II and the original cotton fabrics. In addition, strength and elongation at each yield point of I were different from those of III.<br>(4) Crease recovery of I increased with silicone contents and was greater than that of II.<br>From these results on the silicone cotton fabrics, it may be said roughly that the grafting of silicone to cellulose by irradiation leads to the destruction of cellulose secondary structure in amorphous region or the fixation of cellulose and the grafted silicone acts as a kind of filler to cellulose.

Journal

  • Sen'i Gakkaishi

    Sen'i Gakkaishi 24 (8), 361-365, 1968

    The Society of Fiber Science and Technology, Japan

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