Structural Analyses of Biomaterial Surfaces by X-ray Diffraction
通过 X 射线衍射对生物材料表面进行结构分析
基本信息
- 批准号:10680796
- 负责人:
- 金额:$ 2.3万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:1998
- 资助国家:日本
- 起止时间:1998 至 2000
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
First of all, the experimental apparatus for so-called "Thin Films X-ray Diffraction" and/or "Glazing Angle Incidence of X-ray Diffraction" was set up.After that, by using these system, the surface was analyzed for poly-α-olefins, such as isotactic polypropylene and polybutene-1. The comparison of the crystallinities between the surface and the bulk was done for the films annealed in air at different temperature and times. The crystallinity was lower for the surface compared with the bulk irrespective of annealing conditions. The change in crystallinity drastically occurred up to several micrometers depth from the surface, and the crystallinity was getting low near the surface. The apparent crystallite sizes were smaller for the surface. These showed that crystal growth was restricted near the surface because of localized defects (including chain ends), and high chain mobility. Annealing at higher temperature brought the surface oxidation, which also decreased the surface crystallinity. The residual stress near the surface owing to the quenching from the melt was also detected by this method. The blends of these poly-α-olefins were also investigated. It was found that polypropylene component was predominant at the surface because of its low surface free energy compared with that of polybutene-1.Next, these system were extended for analyses of surface and interface structures of poly (vinyl alcohol) and its laminates. These novel X-ray diffraction methods were found to be quite powerful to investigate the surface and interfacial structures of polymeric biomaterials.
首先,建立了所谓的“薄膜X射线衍射”和/或“X射线衍射的玻璃角入射”的实验装置,然后,使用这些系统对聚α-烯烃,如全同立构聚丙烯和聚丁烯-1进行了表面分析。比较了不同退火温度和退火时间下薄膜表面和体相的堆积情况。无论退火条件如何,与本体相比,表面的结晶度较低。结晶度的变化剧烈地发生在距表面几微米的深度处,并且结晶度在表面附近变得较低。表观晶粒尺寸较小的表面。这表明,由于局部缺陷(包括链端)和高链迁移率,晶体生长在表面附近受到限制。高温退火导致薄膜表面氧化,降低了薄膜的表面结晶度。用这种方法还可以检测到由于熔体淬火而引起的表面附近的残余应力。研究了这些聚α-烯烃的共混物。结果表明,与聚丁烯-1相比,聚丙烯组分的表面自由能较低,在表面占主导地位。这些新的X射线衍射方法被认为是相当强大的调查聚合物生物材料的表面和界面结构。
项目成果
期刊论文数量(6)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
T.Nishino, M.Mukumoto, K.Nakamae: "Interfacial Structure of Poly (vinyl alcohol)/Polystyrene Laminated Thin Films by X-ray Diffraction"J.Chem.Phys.. (to be published).
T.Nishino、M.Mukumoto、K.Nakamae:“通过 X 射线衍射分析聚(乙烯醇)/聚苯乙烯层压薄膜的界面结构”J.Chem.Phys..(即将出版)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
T.Nishino: "Surface Structure of Isotactic Polypropylene/Isotactic Polybutene-1 Blends by X-ray Diffraction"Polymer. (発表予定).
T.Nishino:“通过 X 射线衍射分析等规聚丙烯/等规聚丁烯-1 共混物的表面结构”聚合物(待提交)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
T.Nishino: "Structure of Polyvinyl alcohol Thin Films by X-ray Diffraction" Journal of Physical Chemistry. (発表予定).
T.Nishino:“通过 X 射线衍射分析聚乙烯醇薄膜的结构”,物理化学杂志(即将出版)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
T.Nishino, M.Mukumoto, K.Nakamae: "Surface Structure of Isotactic Polypropylene/Isotactic Polybutene-1 Blends by X-ray Diffraction"Polymer. (to be published).
T.Nishino、M.Mukumoto、K.Nakamae:“通过 X 射线衍射分析等规聚丙烯/等规聚丁烯-1 共混物的表面结构”聚合物。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Takashi Nishino: "Surface Structure of Isotactic Polypropylene by X-ray Diffraction"Polymer Science and Engineering. (5月号予定). (2000)
Takashi Nishino:“X 射线衍射的等规聚丙烯的表面结构”聚合物科学与工程(预定 5 月期)。
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- 影响因子:0
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Functionality and preparation of block copolymer reflecting microstructure of polymer solid
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生态
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06651055 - 财政年份:1994
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$ 2.3万 - 项目类别:
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