HIGH-STRENGTH AND HIGH-MODULUS POLY(VINYL ALCOHOL) BY THE GEL AGING METHOD

被引:16
作者
TANIGAMI, T
NAKASHIMA, Y
MURASE, K
SUZUKI, H
YAMAURA, K
MATSUZAWA, S
机构
[1] Department of Materials Chemistry, Faculty of Textile Science and Technology, Shinshu University Ueda, Nagano
关键词
D O I
10.1007/BF00356057
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The get ageing method was proposed for producing high strength and high modulus poly(vinyl alcohol) (PVA) materials. The PVA gel prepared from a solution in a mixed solvent of dimethylsulfoxide water (v/v) = 80:20 at -34 degrees C was moulded into a gel sheet and then aged in water at 10 degrees C for several months. The gel sheet was dried and then drawn at 200 degrees C. The tensile strength and the modulus of the drawn film were 2.8 and 72 GPa, respectively. These excellent properties are discussed in relation to the structures of the aged gel, the dried gel (namely the film) and the drawn film using the results from X-ray diffraction, differential scanning calorimetry and birefringence measurements. As a result, the most important process was shown to be the ageing process. If the crystallites with relatively low melting temperatures, which were called the B and C crystallites, were grown in the aged gel, the mechanical properties of the drawn film from it were as high as those described above. The orientation of the crystallites mildly caused during drying of the gel sheet was also shown to be a key structure which facilitated the high extension of the chain in the subsequent drawing process.
引用
收藏
页码:5110 / 5120
页数:11
相关论文
共 17 条
[1]   CRYSTAL STRUCTURE OF POLYVINYL ALCOHOL [J].
BUNN, CW .
NATURE, 1948, 161 (4102) :929-930
[2]   GEL SPINNING OF POLY(VINYL ALCOHOL) FROM DIMETHYL SULFOXIDE/WATER MIXTURE [J].
CHA, WI ;
HYON, SH ;
IKADA, Y .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1994, 32 (02) :297-304
[3]  
CIFERRI A, 1979, ULTRA HIGH MODULUS P, P1
[4]   DRAWING OF ULTRAHIGH MOLECULAR-WEIGHT POLYETHYLENE SINGLE-CRYSTAL MATS - THE CRYSTALLINITY [J].
FURUHATA, K ;
YOKOKAWA, T ;
SEOUL, C ;
MIYASAKA, K .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1986, 24 (01) :59-67
[5]  
FURUHATA K, 1984, J POLYM SCI POL PHYS, V22, P133, DOI 10.1002/pol.1984.180220114
[6]  
HIBI S, 1971, SEN-I GAKKAISHI, V27, P41
[7]   HIGH-RESOLUTION SOLID-STATE C-13 NMR-STUDY OF POLY(VINYL ALCOHOL) FIBERS WITH HIGH TENACITY SPUN FROM A DIMETHYL-SULFOXIDE SOLUTION OR AN AQUEOUS-SOLUTION [J].
HU, SH ;
HORII, F ;
ODANI, H ;
NARUKAWA, H ;
AKIYAMA, A ;
KAJITANI, K .
KOBUNSHI RONBUNSHU, 1992, 49 (04) :361-371
[8]   EFFECT OF MOLECULAR-WEIGHT ON DRAWING POLY(VINYL ALCOHOL) FROM SOLUTION-GROWN CRYSTAL MATS [J].
KANAMOTO, T ;
KIYOOKA, S ;
TOVMASYAN, Y ;
SANO, H ;
NARUKAWA, H .
POLYMER, 1990, 31 (11) :2039-2046
[9]   PREPARATION OF ULTRA-HIGH MODULUS POLYVINYL-ALCOHOL FIBERS BY THE ZONE-DRAWING METHOD [J].
KUNUGI, T ;
KAWASUMI, T ;
ITO, T .
JOURNAL OF APPLIED POLYMER SCIENCE, 1990, 40 (11-12) :2101-2112
[10]  
MIZUNO M, 1986, Patent No. 289112