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，小角度中子散射和FT-IR进行了羧基终止的链球化聚（乙烯丁烯）的表征。（ODA）通过两种方法，即通过溶液和熔体。 c。是从SANS测量的非晶状体。菌株（10％）。从CTPEB制备了具有多价金属离子的离子物的值。同时，当其他人变成循环或悬挂端。当氨基残留物被酰胺所取代时，烷烃具有极性残留物，另一方面，它们显示出与CTPEB的无关。晶体聚合物