Sayko Ryan, Jacobs Michael, Dobrynin Andrey V
Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, United States.
ACS Polym Au. 2021 Oct 29;1(3):196-205. doi: 10.1021/acspolymersau.1c00028. eCollection 2021 Dec 8.
We apply a scaling theory of semidilute polymer solutions to quantify solution properties of polysaccharides such as galactomannan, chitosan, sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose, methyl cellulose, xanthan, apple pectin, cellulose tris(phenyl carbamate), hydroxyethyl cellulose, hydroxypropyl cellulose, sodium hyaluronate, sodium alginate, and sodium κ-carrageenan. In particular, we obtain the molar mass of the chain segment inside a correlation blob = as a function of concentration , interaction parameter , and exponent ν. Parameter assumes values , and / for exponents = 0.588, 0.5 and 1, respectively, where is the molar mass of a repeat unit, is the projection length of a repeat unit, and is the Avogadro number. In the different solution regimes, the values of the -parameters are extracted from the plateaus of the normalized specific viscosity η ()/ , where is the weight-average molecular weight of the polymer chain. The values of the -parameters are used in calculations of the excluded volume , Kuhn length , and crossover concentrations , , and ** into a semidilute polymer solution, a solution of overlapping thermal blobs and a concentrated polymer solution, respectively. This information is summarized as a diagram of states of different polysaccharide solution regimes by implementing a / and /* representation. The scaling approach is extended to the entangled solution regime, allowing us to obtain the chain packing number, . This completes the set of parameters { , , } which uniquely describes the static and dynamic properties of a polysaccharide solution.
我们应用半稀聚合物溶液的标度理论来量化多糖（如半乳甘露聚糖、壳聚糖、羧甲基纤维素钠、羟丙基甲基纤维素、甲基纤维素、黄原胶、苹果果胶、三（苯基氨基甲酸酯）纤维素、羟乙基纤维素、羟丙基纤维素、透明质酸钠、海藻酸钠和κ-卡拉胶）的溶液性质。特别地，我们得到了关联微区内部链段的摩尔质量 = 作为浓度 、相互作用参数 和指数ν的函数。对于指数 分别为0.588、0.5和1，参数 分别取值 、 和 / ，其中 是重复单元的摩尔质量， 是重复单元的投影长度， 是阿伏伽德罗常数。在不同的溶液区域中， -参数的值从归一化比浓粘度η ()/ 的平台区提取，其中 是聚合物链的重均分子量。 -参数的值用于计算排除体积 、库恩长度 以及分别进入半稀聚合物溶液、重叠热微区溶液和浓聚合物溶液的交叉浓度* 、 和** 。通过采用 / 和 /** 表示法，这些信息被总结为不同多糖溶液区域的状态图。标度方法被扩展到缠结溶液区域，使我们能够得到链堆积数 。这就完成了唯一描述多糖溶液静态和动态性质的参数集{ 、 、 }。
