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METHOD TO PREPARE ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE PARTICLES AND THEIR APPLICATION
METHOD TO PREPARE ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE PARTICLES AND THEIR APPLICATION
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机译：超高分子量聚乙烯颗粒的制备方法及其应用
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摘要
Disclosed are an ultra-high molecular weight polyethylene resin for fiber and a preparation method thereof. The initial crystallinity of the resin is 60.5 to 90%, the volume average particle size is between 100 and 350 µm, the particle-size distribution is 1.0-2.1, the molecular weight is 2-7 million, the tensile breaking stress is 30 to 60 MPa, the bulk density of the resin is 0.10 to 0.50 g/cm 3 , the infltration time in the solvent decalin is 0.5 to 11 min, the decalin absorption amount of the resin is 2 to 50g of decalin per 100 g of ultra-high molecular weight polyethylene resin, and the white oil absorption amount is 5 to 60 g of decalin per 100 g of ultra-high molecular weight polyethylene resin. According to the preparation method of the resin, ethylene homopolymerization is performed by use of a slurry polymerization process in the presence of a main catalyst and a co-catalyst. The resin is characterized by being excellent in fiber spinning performance, rapid in swelling and dissolution, and stable in spinning and thermal stretching processes. The prepared fibers have characteristics of high modulus and high strength, wherein the modulus ‰¥ 25 cN/dtex, and the strength ‰¥ 800 cN/dtex.
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机译：公开了一种用于纤维的超高分子量聚乙烯树脂及其制备方法。树脂的初始结晶度为60.5至90％，体积平均粒径为100至350 µm，粒径分布为1.0-2.1，分子量为2-7百万，拉伸断裂应力为30至60 MPa，树脂的堆积密度为0.10至0.50 g / cm 3，在溶剂十氢化萘中的浸入时间为0.5至11分钟，树脂的十氢化萘吸收量为每100克超低分子量萘酚2至50克。高分子量聚乙烯树脂，每100克超高分子量聚乙烯树脂的白油吸收量为5至60克十氢化萘。根据树脂的制备方法，在主催化剂和助催化剂的存在下，通过淤浆聚合法进行乙烯均聚。该树脂的特征在于纤维纺丝性能优异，溶胀和溶解迅速，并且在纺丝和热拉伸过程中稳定。所制备的纤维具有高模量和高强度的特性，其中模量≥¥25 cN / dtex，强度≥¥800 cN / dtex。
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