基于熔融接枝烷基链提升聚丁烯发泡行为研究

韩冲; 孙并臻; 宫瑞英; 李朝旭

doi:10.11777/j.issn1000-3304.2020.20109

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基于熔融接枝烷基链提升聚丁烯发泡行为研究

论文 | 更新时间：2021-01-26

- 基于熔融接枝烷基链提升聚丁烯发泡行为研究
- The Investigation on Foamability Behavior of Polybutene Based on Melt Grafting
- 高分子学报 2020年51卷第12期页码：1394-1402
- 作者机构：
  
  中国科学院青岛生物能源与过程研究所　青岛 266101
- 作者简介：
  
  E-mail: gongry@qibebt.ac.cn Rui-ying Gong, E-mail: gongry@qibebt.ac.cn
  E-mail: licx@qibebt.ac.cn Chao-xu Li, E-mail: licx@qibebt.ac.cn
- 基金信息：
  
  山东省自然科学基金(基金号 ZR2017QD003)资助项目
- DOI：10.11777/j.issn1000-3304.2020.20109
  中图分类号：
- 纸质出版日期：2020-10-21，
  
  网络出版日期：2020-7-20，
  
  收稿日期：2020-4-23，
  
  修回日期：2020-5-18，
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韩冲, 孙并臻, 宫瑞英, 李朝旭. 基于熔融接枝烷基链提升聚丁烯发泡行为研究[J]. 高分子学报, 2020,51(12):1394-1402.

Chong Han, Bing-zhen Sun, Rui-ying Gong, Chao-xu Li. The Investigation on Foamability Behavior of Polybutene Based on Melt Grafting[J]. Acta Polymerica Sinica, 2020,51(12):1394-1402.
韩冲, 孙并臻, 宫瑞英, 李朝旭. 基于熔融接枝烷基链提升聚丁烯发泡行为研究[J]. 高分子学报, 2020,51(12):1394-1402. DOI： 10.11777/j.issn1000-3304.2020.20109.

Chong Han, Bing-zhen Sun, Rui-ying Gong, Chao-xu Li. The Investigation on Foamability Behavior of Polybutene Based on Melt Grafting[J]. Acta Polymerica Sinica, 2020,51(12):1394-1402. DOI： 10.11777/j.issn1000-3304.2020.20109.

摘要

聚烯烃材料引入长支化结构，能够提升材料熔体强度和异相成核作用，使聚合物具备更加优异的发泡性能，从而扩宽材料的应用领域. 本文利用甲基丙烯酸十八烷基酯(SMA)熔融改性聚丁烯(PB)，发现其链段缠结程度提升，发泡行为改善. 通过红外谱图的化学结构分析以及材料的力学性能分析，发现随着SMA添加量的增加，材料拉伸强度降低，冲击强度呈现先升高后降低的趋势. 示差扫描量热(DSC)的分析结果表明改性PB的结晶度下降. 采用间歇釜式法制备PB发泡珠粒，利用扫描电子显微镜(SEM)研究发泡珠粒泡孔结构，结果表明：SMA改性后，发泡珠粒平均泡孔尺寸、孔径分布、泡孔密度都得到改善，发泡温度窗口加宽且发泡稳定性提升. 当添加SMA达到3份时，珠粒平均泡孔直径为12.3 μm，泡孔密度可达38 × 10

个/cm

，发泡倍率接近12倍，其中泡孔密度和发泡倍率分别是纯PB发泡珠粒的9.2倍和1.6倍. 本文的研究成果为PB作为发泡材料提供了一定的理论和实验参考依据 .

Abstract

The melt strength of polyolefin materials could be enhanced by graft modification

since the introduction of long side chains could result in entanglement among the chains and thus improve the foaming properties. Herein

polybutylene (PB) with the improved foaming property was produced by melt grafting of octadecyl methacrylate (SMA) as long side chains. It was found that the chain entanglement was increased and the foaming behavior was improved. The structure was characterized by infrared (IR) spectroscopy

differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). Compared with un-modified PB

the tensile strength of the modified PB decreased

whereas its impact strength firstly increased and then decreased when increasing the amount of SMA. DSC curves showed that the crystallinity of PB decreased when increasing the grafting dosage. The SEM images showed that all the parameters including the average cell size

cell size distribution

and cell density of foam beads were improved after introducing the longside chains. When the weight ratio of SMA/PB was 3/100

the average cell diameter of PB was 12.3 μm

the cell density was 38 × 10

cells/cm

and the expansion ratio was 12. The cell density and expansion ratio of PB with longside chains were 9.2 times and 1.6 times respectively as many as those of un-grafted PB produced with the same foaming method. Additionally

the grafted PB exhibited a wider foaming temperature range.

关键词

聚丁烯长支化发泡

Keywords

PolybutyleneGrafting chainFoaming

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