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Preparation and characterization of syndiotacticity‐rich ultra‐high molecular weight poly(vinyl alcohol)/imogolite blend film
Author(s) -
Choi Jin Hyun,
Cho Yong Woo,
Ha Wan Shik,
Lyoo Won Seok,
Lee Chul Joo,
Ji Byung Chul,
Han Sung Soo,
Yoon Won Shik
Publication year - 1998
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(1998100)47:2<237::aid-pi66>3.0.co;2-e
Subject(s) - materials science , ultimate tensile strength , vinyl alcohol , imogolite , composite material , polymer chemistry , amorphous solid , chemical engineering , polymer , aluminosilicate , crystallography , chemistry , organic chemistry , engineering , catalysis
To enhance the physical properties of syndiotacticity‐rich (syndiotactic diad content 63·4%) ultra‐high molecular weight (UHMW) (number‐average degree of polymerization 12300) poly(vinyl alcohol) (PVA) film, it was solution blended with rigid‐rod imogolite in dimethyl sulphoxide. In addition, the blend film prepared was stretched using a high‐temperature zone drawing technique for effective orientation of the film. Through a series of experiments, it was found that imogolite caused significant changes in the structure and properties of syndiotacticity‐rich UHMW PVA film, i.e. imogolite acted as an important agent which increased crystal orientation of syndiotacticity‐rich UHMW PVA, resulting in enhanced tensile strength of the film. However, imogolite played a hindering role in raising the amorphous orientation of syndiotacticity‐rich UHMW PVA. The maximum tensile modulus of 19·8GPa and maximum tensile strength of 1·8GPa could be obtained at the maximum draw ratio of 7·45 for PVA/imogolite blend film. In the case of PVA homo film, the highest tensile modulus and strength were 25·2GPa and 1·4GPa, respectively. © 1998 Society of Chemical Industry