台化塑膠事業部原為化工*二事業部,早期是為配合台塑企業六輕計劃上下游相關產業之發展而設立,當時負責芳香烴、苯乙烯系列之建廠籌劃,由於六輕計劃案廠址之滯延,乃決定由下游之聚苯乙烯(Polystyrene)先著手建廠,將產品導入市場,以利將來上游產品之產銷。
PP化学改性:通过共聚改性、交联改性、接枝改性、添加成核剂等使PP(聚丙烯)高分子组分与大分子结构或晶体构型发生改变而提高其机械性能、耐热性、耐老化性等性能,提升其综合性能、扩大其应用领域
The production process of polypropylene has experienced several development stages, such as solvent method, solution method, liquid phase bulk method (including liquid phase gas phase combination type) and gas phase method. According to the classification, there are mainly the following categories: solvent method, solution method, liquid phase bulk method (including liquid phase gas phase combination formula) and gas phase method
聚丙烯是丙烯加聚反应而成的聚合物,一种**物。系白色蜡状材料,外观透明而轻。化学式为(C3H6)x,密度为0.89~0.91g/cm3, 易燃,熔点165℃,在155℃左右软化,使用温度范围为-30~140℃ 。在80℃以下能耐酸、碱、盐液及多种的腐蚀,能在高温和氧化作用解
Although PP has higher mechanical strength and modulus than recycled PE, the impact resistance, especially stress cracking resistance, and low temperature performance of recycled PP are poor, like the new PP resin. These properties are determined by the aggregation structure and macromolecular chain structure of PP, so it can be modified by polyethylene. When the blends of recycled PE (LDPE, HDPE) and PP are made, if there are more recycled PP materials, the alloy can be directly prepared. For example, if 10% - 25% HDPE is added into PP, the impact strength of the modified blend is increased by more than 8 times than that of PP at - 20 ℃, and the processing fluidity is increased, so it can be applied to the molding of large containers. In terms of structure, the addition of PE destroys the crystallization of PP, such as the fragmentation of macrospherulites, and also reduces the crystallinity of PP; if EPDM is added into the system, the crystallization of PP is also reduced. About 5% can improve the compatibility of PP and PE, and the impact strength can also be improved by adding a small amount of EPR rubber.
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