| 废旧胶粉/聚丙烯共混物的制备及性能研究 |
| Preparation and Properties of Waste Rubber Powder/Polypropylene Blends |
| 投稿时间：2020-06-18 修订日期：2020-06-18 |
| DOI：10.12136/j.issn.1000-890X.2021.03.0185 |
| 中文关键词: 废旧胶粉 聚丙烯 共混物 相容性 流动性 复数粘度 储能模量 |
| 英文关键词: waste rubber powder polypropylene blend compatibility flow property complex viscosity storage modulus |
| 基金项目: |
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| 中文摘要: |
| 熔融接枝法制得的马来酸酐接枝聚丙烯5076（MAH-g-5076）可改善聚丙烯与废旧胶粉的界面相容性，高熔体质量流动速率聚丙烯MF650Y可改善废旧胶粉/聚丙烯共混物的流动性能，利用双螺杆挤出机挤出制得高性能、易加工的废旧胶粉/聚丙烯共混物，研究MF650Y用量对共混物性能的影响。结果表明：随着MF650Y用量（MF650Y和MAH-g-5076用量共30份）的增大，共混物的拉伸强度先增大后减小，在MF650Y用量为5～10份范围内达到最大值，拉断伸长率呈现震荡减小趋势，熔体质量流动速率增大；随着角频率的增大，共混物的复数粘度（η*）减小，储能模量（G′）和损耗模量趋于增大，当MF650Y用量为5份时，共混物的η*和G′最大；MF650Y用量为10份时有助于保护C=C键及抑制交联反应，此时聚丙烯与废旧胶粉相容性较好，两相界面结合能力较强，共混物无明显孔洞。 |
| 英文摘要: |
| Abstract：The maleic anhydride grafted polypropylene 5076（MAH-g-5076） which was prepared by
melt grafting method could improve the interface compatibility between polypropylene and waste rubber
powder，and polypropylene MF650Y which had a high melt mass flow rate could improve the flow properties
of waste rubber powder/polypropylene blends. In this study，waste rubber powder/polypropylene blends with
high-performance and good processing properties were prepared by twin-screw extruder extrusion，and the
effect of the addition level of MF650Y on the properties of the blends was studied. The result showed that
with the increase of the addition level of MF650Y（total addition level of MF650Y and MAH-g-5076 was 30
phr），the tensile strength of the blends increased first and then decreased，it reached the maximum value when
the addition level of MF650Y was 5 ～ 10 phr，the elongation at break presented an oscillating decreasing
trend，and the melt mass flow rate increased. As the angular frequency increased，the complex viscosity
（η*） of the blends decreased，and the storage modulus（G′） and loss modulus tended to increase. When the
addition level of MF650Y was 5 phr，the η* and G′ of the blends were the largest. When the addition level of
MF650Y was 10 phr，it effectively helped to protect the carbon-carbon double bond and inhibited the crosslinking
reaction. At this time，the compatibility of polypropylene and waste rubber powder was better，the
bonding ability of the two-phase interface was stronger，and there was no obvious hole in the blends. |
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