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1)GB/T 1033.2—2010《塑料非泡沫塑料密度的测定第2部分:密度梯度柱法》。规定了用密度梯度柱测定非泡沫塑料密度的方法。适用于模塑或挤出的无孔非泡沫塑料固体颗粒。2)GB/T 1033.3—2010《塑料非泡沫塑料密度的测定第3部分:气体比重瓶法》。规定了内部不含孔隙的任何形状的固体非泡沫塑料的密度或比容的测量方法。3)GB/T 1632.3—2010《塑料使用毛细管黏度计测定聚合物稀溶液黏度第3部分:聚乙烯和聚丙烯》。规定了聚乙烯和
1) GB / T 1033.2-2010 “Plastics - Determination of non-foam density - Part 2: Density gradient column method”. Provides a method for determining the density of non-foamed plastics using density gradient columns. Non-porous non-foamed solid particles for molding or extrusion. 2) GB / T 1033.3-2010 “Plastics - Determination of non-foam density - Part 3: Gas pycnometer method”. A method of measuring the density or specific volume of solid non-foamed plastics of any shape with no internal pores. 3) GB / T 1632.3-2010 “Plastics - Determination of the viscosity of dilute polymer solutions using a capillary viscometer - Part 3: Polyethylene and polypropylene”. Prescribed polyethylene and