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首页> 外文期刊>Journal of Applied Polymer Science >Photografting polymerization of polyacrylamide on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) films. II. Wettability and crystallization behaviors of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)graft-polyacrylamide films
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Photografting polymerization of polyacrylamide on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) films. II. Wettability and crystallization behaviors of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)graft-polyacrylamide films

机译：聚丙烯酰胺在聚（3-羟基丁酸酯-co-3-羟基戊酸酯）薄膜上的光接枝聚合。二。聚（3-羟基丁酸酯-co-3-羟基戊酸酯）接枝聚丙烯酰胺薄膜的润湿性和结晶行为

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The wettability and crystallization behaviors of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)graft-polyacrylamide (PAM) films were studied. X-ray photoelectron spectroscopy analyses illustrated that about 62 atom % of the total polar functionalities on the grafted film with 17%. grafting percentage (GP) was amide groups. Wide-angle X-ray diffraction results suggest that grafted PAM induced defects in PHBV crystals and influenced their crystal structure. Differential scanning calorimetry (DSC) spectra showed the two melting regions, 60-90 and 145-170 degrees C, of the imperfect PHBV crystals of the grafted films. Grafted PAM could suppress the recrystallization of PHBV, which was consistent with the polarizing optical microscopy results, in which the maximum PHBV spherulite diameter decreased from 350 pm for the PHBV film to 50 mu m for the film with 53% GP. In addition, DSC studies revealed that the crystallinity of the grafted films decreased with increasing GP, which facilitated the diffusion of water into the films. The water contact angle of grafted films decreased and the water-swelling percentage increased as GP went up. These results demonstrate the potential of PHBV-g-PAM for wettable surface constructs in tissue engineering applications. (C) 2007 Wiley Periodicals, Inc.
机译：研究了聚（3-羟基丁酸酯-co-3-羟基戊酸酯）（PHBV）接枝聚丙烯酰胺（PAM）薄膜的润湿性和结晶行为。 X射线光电子能谱分析表明，接枝膜上总极性官能度的约62原子％为17％。接枝率（GP）为酰胺基。广角X射线衍射结果表明，接枝的PAM会引起PHBV晶体中的缺陷并影响其晶体结构。差示扫描量热法（DSC）光谱显示了接枝薄膜的不完美PHBV晶体的两个熔化区域，分别为60-90和145-170摄氏度。接枝的PAM可以抑制PHBV的再结晶，这与偏光光学显微镜的结果一致，其中最大PHBV球晶直径从PHBV膜的350 pm减小到GP含量为53％的膜的50μm。此外，DSC研究表明，接枝膜的结晶度随GP的增加而降低，从而促进了水向膜中的扩散。随着GP的增加，接枝膜的水接触角减小，水溶胀率增加。这些结果证明了PHBV-g-PAM在组织工程应用中可湿性表面构建物的潜力。 （C）2007 Wiley期刊公司

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