Structure and Properties of Supermolecular Elastomer Formed by Telechelid Polymer and Crystalline Amines

Telechelid聚合物与结晶胺形成的超分子弹性体的结构与性能

基本信息

批准号：
18550197
负责人：
TAKAHASHI Yoshiaki
金额：
$ 2.56万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

项目摘要

Characterization of carboxyl-terminated telechelic poly(ethyrene-butylene)(CTPEB) was performed by NMR, GPC, small angle neutron scattering (SANS), and FT-IR. It was clarified that this sample has M_n=2000 and almost 100% telechelic. CTPEB sample was neutralized by octadecylamine (ODA) by two methods, i.e., via solution and melt blending and confirmed that the neutralized samples by both methods have practically the same structure and physical properties. A series of sample with different molar ratio of COOH and NH_2 were prepared and their structure and viscoelastic properties at around room temperature (ca 25 ℃) and elevated temperature (65 or 70℃) were examined. The 1: 1 blend sample did not show elastic behavior at all. When excess ODA was added, the system was elastic substance at low temperature and viscoelastic liquid at high temperature. The transition was reversible. From DSC, XRD, FT-IR analysis, it was revealed that most of ODA are non-crystalline. From SANS measurements, sc … More attering curve similar to aluminum tristearylate/decalin system, which was examined as a reference system and became clear that its viscoelastic behavior is due to entangled wormlike micelle structure generated by aggregation of C_18 residue. Therefore, it was concluded that the elastic behavior of CTPEB/ODA is also due to the network structure generated by aggregation of C_18 residue. Strength of the network structure was examined by strain sweep measurement and found that this system shows plastic flow at low strain (ca. 10%). This value is close to the values obtained for ionomers, which was prepared by neutralization of CTPEB with multivalent metal ions.From the value of plateau modulus, it was speculated that only 10 % of poly(ethyrene-butylene) molecules take bridge conformation while others become loop or dangling ends.When amino residue is replaced by amide, there was only a slight increase of transition temperature. Other model alkanes having polar residues, they showed poor miscibility with CTPEB. On the other hand, their crystalline structure and structural transition are very interesting which can be studied as model system for crystalline polymers. Less

NMR，GPC，小角度中子散射（SANS）和FT-IR对羧基终止的远程技术聚（乙烯甲苯）（CTPEB）的表征进行了表征。可以澄清的是，该样品具有M_N = 2000，几乎是100％的Telechelic。 CTPEB样品通过两种方法（即通过溶液和融化混合物）通过八甲胺（ODA）中和，并确认通过两种方法中和样品的样品实际上都具有相同的结构和物理特性。制备了一系列具有不同摩尔比的样品，并在室温（Ca 25℃）（Ca 25℃）和温度升高（65或70℃）的情况下进行了其结构和粘弹性。 1：1的混合样品根本没有显示出弹性行为。当添加超过ODA时，该系统是低温下的弹性物质，在高温下是粘弹性液体。过渡是可逆的。从DSC，XRD，FT-IR分析中，揭示了大多数ODA是非晶状体的。根据SANS的测量，SC…更加易于的曲线类似于三乙二甲酸铝/曲链蛋白系统，该系统被检查为参考系统，并清楚地表明，其粘弹性行为是由于C_18住所的聚集而产生的纠缠蠕虫样胶状胶束结构。因此，得出的结论是，CTPEB/ODA的弹性行为也是由于C_18住宅的聚集产生的网络结构。通过应变扫描测量来检查网络结构的强度，发现该系统在低应变时显示塑料流动（10％）。该值接近于离子体获得的值，该值是通过用多价金属离子中和CTPEB制备的。从高原模量的值来看，只有10％的聚（乙二基丁基）分子桥接桥的桥接构象，而其他氨基氨基的轴是由Amino残留替换的，而毫无用处。其他具有极性残留物的烷烃模型，它们与CTPEB的混乱性差。另一方面，它们的晶体结构和结构过渡非常有趣，可以作为晶体聚合物的模型系统研究。较少的