Free Polymer Chains Dissolved in a Strained Elastomer: Neutron Scattering Test of the Anisotropy
Free Polymer Chains Dissolved in a Strained Elastomer: Neutron Scattering Test of the Anisotropy
复制标题
溶解在应变弹性体中的游离聚合物链：各向异性的中子散射测试
DOI：
10.1209/0295-5075/1/12/005
复制
发表时间：
1986
期刊：
影响因子：
1.8
通讯作者：
C. Picot
中科院分区：
文献类型：
--
作者：
F. Boué;B. Farnoux;J. Bastide;A. Lapp;J. Herz;C. Picot
我们通过小角中子散射测量了溶解在非氘化网络中的标记游离链聚二甲基硅氧烷 (PDMS-D) 的形状因子 S(q)。交联之间的分子量与游离链的分子量相同(Mn = 10 000)。使用二维检测器，我们观察到拉伸网络中自由链没有可检测到的各向异性（3% 以内）。在任何伸长率下，S(q) 都是相同的，并且是整个 q 范围内典型的高斯构象，就像熔体内部的 PDMS 链一样。讨论中会考虑在同一问题上报告的同一链上的 DMR 数据，这些数据显示了方向。
We have measured, by small-angle neutron scattering, the form factor S(q) of a labelled free chain of polydimethyl-siloxane (PDMS-D) dissolved in a nondeuterated network. The molecular weight between cross-links is the same as the one of the free chain (Mn = 10 000). Using a bidimensional detector, we observe no detectable anisotropy of the free chain in the stretched network (within 3%). At any elongation, S(q) is the same, and is typical of the Gaussian conformation all over the q range, as it is for the PDMS chain inside a melt. DMR data on the same chain, reported in the same issue, and which show an orientation, are taken into account in the discussion.