|
GPC(Gel Permeation Chromatography),凝胶渗透色谱，又称为尺寸排阻色谱（Size Exclusion Chromatography,简称SEC），它是基于体积排阻的分离机理，通过具有分子筛性质的固定相，用来分离相对分子质量较小的物质，并且还可以分析分子体积不同、具有相同化学性质的高分子化合物。 聚***钠标准品Polyacrylic Acid-Na Salt |
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| 水性凝胶色谱标准品（Aqueous GPC/SEC Standa***） | ||||
| （1）线性聚***钠，100%水溶 | ||||
| Linear, 100% Water Soluble Powders250mg包装 | ||||
| Catalog # | Mp | Mw | Mn | IV* |
| PAA1K | 900 | 1,300 | 830 | 0.055 |
| PAA2K | 1,250 | 1,930 | 1,230 | 0.068 |
| PAA3K | 1,770 | 2,400 | 1,650 | 0.079 |
| PAA4K | 2,925 | 3,800 | 2,280 | 0.103 |
| PAA5K | 4,100 | 5,660 | 3,450 | 0.122 |
| PAA7K | 5,800 | 6,950 | 3,700 | 0.127 |
| PAA8K | 7,500 | 8,300 | 6,200 | 0.155 |
| PAA18K | 16,000 | 18,100 | 12,800 | 0.228 |
| PAA35K | 28,000 | 36,900 | 23,100 | 0.315 |
| PAA70K | 47,500 | 70,900 | 39,400 | 0.509 |
| PAA85K | 62,900 | 83,400 | 47,900 | 0.595 |
| PAA130K | 115,000 | 131,200 | 78,400 | 0.845 |
| PAA165K | 130,500 | 165,300 | 97,800 | 1.074 |
| PAA245K | 193,800 | 245,200 | 153,250 | 1.825 |
| IV* - Intrinsic Viscosity (dL/g) in 0.05M Sodium Sulfate at 30°C | ||||
| (a = 0.50; K = 0.001740 below Mw of 20,000) | ||||
| (a = 0.86; K = 0.000040 above Mw of 20,000) | ||||
| （2）线性聚***钠，100%水溶 | ||||
| Linear, 100% Water Soluble Powders250mg包装 | ||||
| Catalog # | Mp | Mw | Mn | IV* |
| PAA495K | 392,600 | 495,000 | 311,300 | 2.815 |
| PAA585K | 467,300 | 585,500 | 373,000 | 3.49 |
| PAA695K | 585,400 | 695,100 | 493,000 | 3.853 |
| PAA715K | 639,700 | 713,500 | 496,400 | 4.173 |
| PAA755K | 589,700 | 755,250 | 460,500 | 3.728 |
| PAA925K | 825,000 | 925,000 | 650,000 | 5.03 |
| PAA990K | 856,500 | 987,400 | 617,100 | 5.607 |
| PAA1050K | 750,000 | 1,050,000 | 615,000 | 5.63 |
| PAA1360K | 1,100,000 | 1,360,000 | 888,900 | 7.205 |
| PAA1550K | 1,484,000 | 1,552,000 | 1,157,000 | 8.007 |
| PAA1700K | 2,250,000 | 1,700,000 | 1,100,000 | 9.355 |
| IV* - Intrinsic Viscosity (dL/g) in 0.05M Sodium Sulfate at 30°C | ||||
| (a = 0.50; K = 0.001740 below Mw of 20,000) | ||||
| (a = 0.86; K = 0.000040 above Mw of 20,000) | ||||
| （3）宽分子量分布 100%水溶 | ||||
| Broad, 100% Water Soluble Powders1.0g包装 | ||||
| Catalog # | Mw | Mn | Mz | IV* |
| PAA1200KBR | 1,200,000 | 625,000 | 1,750,000 | 5.28 |
| PAA500KBR | 507,400 | 132,500 | 878,500 | 2.653 |
| PAA383KBR | 383,200 | 59,300 | 1,025,000 | 1.635 |
| PAA308KBR | 308,600 | 54,200 | 690,000 | 1.351 |
| PAA298KBE | 298,600 | 54,900 | 672,300 | 1.471 |
| PAA297KBR | 297,600 | 47,000 | 700,000 | 1.48 |
| PAA275KBR | 275,000 | 22,200 | 793,100 | 0.97 |
| PAA270KBR | 270,000 | 61,900 | 602,600 | 1.393 |
| PAA167KBR | 167,800 | 16,800 | 480,700 | 0.859 |
| PAA136KBR | 136,300 | 24,500 | 340,900 | 0.734 |
| PAA29KBR | 29,200 | 7,300 | 66,600 | 0.213 |
| PAA19KBR | 19,400 | 3,500 | 52,200 | 0.153 |
| PAA10KBR | 10,500 | 1,750 | 24,000 | 0.165 |
| PAA8KBR | 8,500 | 2,500 | 23,800 | 0.104 |
| PAA4KBR | 4,300 | 850 | 11,100 | 0.11 |
| PAA2KBR | 1,900 | 825 | 4,800 | 0.059 |
| PAA1KBR | 1,400 | 250 | 4,800 | 0.06 |
| IV* - Intrinsic Viscosity (dL/g) in 0.05M Sodium Sulfate at 30°C | ||||
| (a = 0.50; K = 0.001740 below Mw of 20,000) | ||||
| (a = 0.86; K = 0.000040 above Mw of 20,000) | ||||
注解：
Mn Number ***erage molecular weight
Mp Peak ***erage molecular weight
Mv Viscosity ***erage molecular weight
Mw Weight ***erage molecular weight
Mz Z-***erage molecular weight
IV* Intrinsic Viscosity (dl/gm)
数均分子量（Number-***erage molecular weight）：按聚合物中含有的分子数目统计平均的分子量，高分子样品中所有分子的总重量除以其分子(摩尔)总数。
重均分子量（ Weight-***erage molecular weight）：按照聚合物的重量进行统计平均的分子量，i-聚体的分子量乘以其重量分数的加和。
Z均分子量（Z-***erage molecular weight ）：按照Z值统计平均的分子量
粘均分子量（Viscosity- ***erage molecular weight）：对于一定的聚合物－溶剂体系，其特性粘数[η]不同。
Mz > Mw > Mv > Mn，Mv略低于Mw
Mn靠近聚合物中低分子量的部分，即低分子量部分对Mn影响较大
Mw靠近聚合物中高分子量的部分，即高分子量部分对Mw影响较大
一般用Mw来表征聚合物比Mn更恰当，因为聚合物的性能如强度、熔体粘度更多地依赖于样品中较大的分子。
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