本文關(guān)鍵詞：聚烯烴粘性樹脂材料的開發(fā)　出處：《天津科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 聚乙烯 馬來酸酐 過氧化苯甲酰 剝離強(qiáng)度 接枝率 凝膠含量 粘性樹脂

【摘要】：本論文通過熔融接枝方法對聚乙烯(PE)接枝馬來酸酐(MAH)制備粘性樹脂材料進(jìn)行研究。實驗對接枝過程的加工溫度、基礎(chǔ)樹脂選擇、引發(fā)劑和單體的最佳配方以及添加助劑減少副交聯(lián)反應(yīng)進(jìn)行研究,制得能良好粘接尼龍6(PA6)膜且交聯(lián)晶點幾乎為零的聚烯烴粘性樹脂。測試了制得的接枝物的接枝率及凝膠含量,并對其剝離強(qiáng)度、拉伸性能、熔體流動速率、流變性能、熱學(xué)性能、水蒸氣透過率及結(jié)晶等多項性能進(jìn)行研究。實驗通過改變基體樹脂的種類,包括：低密度聚乙烯(LDPE)、超低密度聚乙烯(VLDPE)、線性低密度聚乙烯(LLDPE)以及不同樹脂的復(fù)配體系,確定能良好粘接PA6膜的粘性樹脂的基體樹脂為VLDPE/LLDPE=90/10的復(fù)配體系。研究了接枝所需的最佳加工溫度,通過改變不同的加工溫度研究對體系的性能影響,確定了最佳加工溫度為170℃�；瘜W(xué)滴定法和紅外光譜分析表明,MAH單體確實接枝到了PE大分子鏈上。實驗采用過氧化苯甲酰(BPO)為引發(fā)劑,研究了不同添加量的BPO對接枝體系的影響。通過實驗得出,隨BPO含量的增加,接枝率先上升后降低,當(dāng)BPO添加含量為0.08份時,為體系最佳選擇；同時研究了不同添加量的MAH對接枝體系的影響,隨MAH含量的增加,接枝率先上升后小幅度下降,當(dāng)MAH添加含量為0.8份時,為體系的最佳選擇。由于接枝過程中會出現(xiàn)不可避免的交聯(lián)副反應(yīng),即出現(xiàn)凝膠現(xiàn)象,研究的粘性樹脂在吹膜時會出現(xiàn)晶點問題,影響薄膜表觀及對PA6膜的粘接性能,因此嘗試了不同種類的加工助劑二甲基甲酰胺(DMF)和苯乙烯(St),改善了晶點問題,且St效果更好。通過研究最終可得結(jié)論：在170℃加工溫度下,以VLDPE/LLDPE=90/10復(fù)配體系為基體樹脂,MAH添加量為0.8份,BPO的添加量為0.08份,減少交聯(lián)的助劑St的添加量為0.8份時,體系接枝率達(dá)到1.78%,凝膠含量為4.3%,對PA6膜的剝離強(qiáng)度達(dá)到65.9N/cm,基本符合實際應(yīng)用要求。
[Abstract]:In this paper, the melt grafting method was used to study the preparation of viscous resin materials by grafting polyethylene (Pe) onto maleic anhydride (MAH). The processing temperature of the grafting process and the selection of the basic resin were studied. The optimum formulation of initiator and monomer and the addition of additives to reduce the side crosslinking reaction were studied. Polyolefin adhesive resin with good adhesion to nylon 6 / PA6) film with almost zero cross-linking crystal point was prepared. The graft rate and gel content of the grafted polymer were measured, and the peel strength and tensile properties of the resin were also studied. The melt flow rate, rheological properties, thermal properties, water vapor transmittance and crystallization were studied by changing the types of matrix resins, including: LDPE (low density polyethylene). Ultra low density polyethylene (VLDPE), linear low density polyethylene (LLDPE) and the blend system of different resins. The matrix resin of the adhesive resin with good adhesion to PA6 film was determined as the compound system of VLDPE/LLDPE=90/10. The optimum processing temperature for grafting was studied. The optimum processing temperature was determined to be 170 鈩，

本文編號：1439559