HYALURONIC-ACID (HYDROXYPROPYL)CELLULOSE BLENDS - A SOLUTION AND SOLID-STATE STUDY

被引:45
作者
DAVE, V
TAMAGNO, M
FOCHER, B
MARSANO, E
机构
[1] STN SPERIMENTALE CELLULOSA,I-20133 MILAN,ITALY
[2] UNIV GENOA,IST CHIM IND,I-16132 GENOA,ITALY
关键词
D O I
10.1021/ma00114a006
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
We report a study of the compatibility of a system involving a flexible polymer, hyaluronic acid (HA), and a semirigid polymer, (hydroxypropyl)cellulose (HPC). The phase diagram of ternary mixtures composed of HA, HPC, and H2O showed a homogeneous solution at an overall polymer concentration lower than C-p approximate to 15%, but when the concentration was increased, two demixing areas were evidenced: the first (range C-p 15-21%) corresponds to an equilibrium between two isotropic phases, while the second (over C-p = 21%) represents the coexistence of a HPC mesophase with an isotropic phase of both polymers. In contrast, optical and electron microscopy observations as well as X-ray, FT-Raman, DSC, and DMTA experiments carried out on blended films showed complete HPC/HA compatibility in all the compositions. DMTA experiments revealed a single glass transition temperature (T-g); its dependence as a function of composition was analyzed by Kwei's equation. Different values were found for dry and 65% relative humidity (RH) conditioned samples, suggesting the important role of water as a plasticizer in HPC/HA blends.
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页码:3531 / 3539
页数:9
相关论文
共 46 条
[31]   CELLULOSE POLY(4-VINYLPYRIDINE) BLENDS [J].
MASSON, JF ;
MANLEY, RS .
MACROMOLECULES, 1991, 24 (22) :5914-5921
[32]   STATISTICAL THERMODYNAMICS OF MIXTURES OF SEMIRIGID MACROMOLECULES - CHAINS WITH RODLIKE SEQUENCES AT FIXED LOCATIONS [J].
MATHESON, RR ;
FLORY, PJ .
MACROMOLECULES, 1981, 14 (04) :954-960
[33]   LIQUID-CRYSTAL ELASTOMERS BASED UPON CELLULOSE DERIVATIVES [J].
MITCHELL, GR ;
GUO, W ;
DAVIS, FJ .
POLYMER, 1992, 33 (01) :68-74
[34]   HYALURONIC-ACID - MOLECULAR-CONFORMATION AND INTERACTIONS IN THE TETRAGONAL FORM OF THE POTASSIUM-SALT CONTAINING EXTENDED CHAINS [J].
MITRA, AK ;
ARNOTT, S ;
SHEEHAN, JK .
JOURNAL OF MOLECULAR BIOLOGY, 1983, 169 (04) :813-827
[35]   CELLULOSE POLYVINYL-ALCOHOL) BLENDS PREPARED FROM SOLUTIONS IN N,N-DIMETHYLACETAMIDE LITHIUM-CHLORIDE [J].
NISHIO, Y ;
MANLEY, RS .
MACROMOLECULES, 1988, 21 (05) :1270-1277
[36]   THEORY OF EXCLUDED-VOLUME EFFECT OF A POLYELECTROLYTE IN A 1-1 ELECTROLYTE SOLUTION [J].
ODIJK, T ;
HOUWAART, AC .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1978, 16 (04) :627-639
[37]  
Oxford P., 1989, INT J BIOL MACROMOL, V11, P91
[38]  
PICULELL L, 1991, POLYM COMMUN, V32, P158
[39]  
PIZZOLI M, 1991, PLAST RUB COMPOS PRO, V16, P299
[40]   THERMAL AND DYNAMIC MECHANICAL-PROPERTIES OF HYDROXYPROPYL CELLULOSE FILMS [J].
RIALS, TG ;
GLASSER, WG .
JOURNAL OF APPLIED POLYMER SCIENCE, 1988, 36 (04) :749-758