新型端基型疏水缔合水溶性聚合物的合成及其性能

提出了端基型疏水缔合水溶性聚合物的分子结构设想,合成了新型端基型疏水缔合水溶性聚合物,克服了疏水基团在分子链中无规则分布的缺点;疏水基团位于分子链的两端,受分子链弯曲屏蔽的影响作用比一般的疏水缔合水溶性聚合物的影响小,使疏水缔合作用更加明显。评价了疏水端基大小和浓度对聚合物性能的影响和聚合物溶液的盐增粘性、抗温性、抗剪切性以及溶液中聚合物与外加表面活性剂的相互作用。结果表明,在水溶性聚合物分子的两端接上了不同的疏水基团,形成端基型疏水缔合水溶性聚合物,该类聚合物结构清楚,相对分子质量确定,并具有很好的增粘性、抗温性、抗盐性和抗剪切性;当疏水端基的质量分数为1.2%时,溶液的流出时间最长,说明缔合作用最强。

Synthese of A Novel End Group Hydrophobic Associated Water Soluble Polymer

The molecular structure of end group hydrophobic associated water soluble polymer was assumed in this paper. The novel end group hydrophobic associated water soluble polymer was synthesized and it o-vercome the shortcomings of the hydrophobic group random distribution in the molecule chain. Comparing to the conventional hydrophobic polymer, the bending and shielding of the chain had a less effect on the hydrophobic group due to its being at the end of the chain. The hydrophobic associated effect was more signifficant. The effects of size and concentration of the hydrophobic end group on performances of polymer was evaluated, respectively. The performances of polymer solution including salt resistance, viscosify-ing, temperature resistance, shear resistance and the interaction between the polymer and the surfactants were evaluated . Results indicated that the novel end group hydrophobic associated water soluble polymer had a clear structure and a definite molecular weight. It presented better properties such as viscosifying, temperature resistance, salt resistance and shear resistance. When the hydrophobic group had a mass fraction of 1. 2% , the strongest associated action and the longest outlet time of the polymer solution were obtained.