Tailored Structure and Properties of Injection-Molded Atactic Polypropylene/Isotactic Polypropylene Blend
Tailored Structure and Properties of Injection-Molded Atactic Polypropylene/Isotactic Polypropylene Blend
复制标题
注塑无规聚丙烯/等规聚丙烯共混物的定制结构和性能
DOI：
10.1021/sc400140y
复制
发表时间：
2013-06
期刊：
影响因子：
--
通讯作者：
Li, Zhong-Ming
中科院分区：
文献类型：
--
作者：
Zhang, Zhengchi;Lei, Jun;Chen, Yanhui;Chen, Jun;Ji, Xu;Tang, Jianhua;Li, Zhong-Ming
为了提高无规聚丙烯(APP)的韧性，实现APP的规模化使用，本文采用注塑成型工艺制备了不同APP含量的APP/IPP。用差示扫描量热仪(DSC)、广角X射线衍射仪(WAXD)、小角X射线散射仪(SAXS)和扫描电子显微镜(SEM)对注塑件的层次化结构进行了表征。结果表明，在适宜的工艺条件下，在APP含量较低的注塑件中，iPP的结晶度相对较高，表层iPP的结晶度较高，且iPP的结晶度较高。因此，当加入20wt%的APP组分时，iPP的韧性从31.8 MJ/m~3提高到42.6MJ/m~3，而拉伸强度仅从45.9 MJ/m~3下降到40.5 MJ/m~3。当APP含量达到50wt%时，APP/iPP共混物的韧性提高到52.0MJ/m~3，拉伸强度提高到52.0MJ/m~3。
In the present work, atactic polypropylene (aPP)/isotactic polypropylene (iPP) with different aPP content was prepared through an injection-molding process to improve the toughness of iPP and make large scale use of aPP. The hierarchic structure of the injection-molded parts was characterized through differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), and scanning electron microscopy (SEM). It was found that the network of iPP crystals was still integral with shish-kebab structures in the skin layer and the relatively high crystallinity of iPP in injection-molded parts with low aPP content utilizing suitable process conditions. Therefore, the toughness of iPP was enhanced from 31.8 to 42.6 MJ/m3 due to the addition of a 20 wt % aPP component, meanwhile the tensile strength only decreased from 45.9 to 40.5 MPa. Furthermore, when aPP content reached 50 wt %, the toughness of the aPP/iPP blends increased to 52.0 MJ/m3 with the tensile strength st...
登录
查看更多内容
DOI：
10.1063/1.1795712
发表时间：
2004-10
期刊：
The Journal of chemical physics
影响因子：
--
作者：
Phillip Choi;W. Mattice
通讯作者：
Phillip Choi;W. Mattice
DOI：
10.1002/1099-0488(20000801)38:15
发表时间：
2000-08
期刊：
Journal of Polymer Science Part B
影响因子：
--
作者：
V. Bondar;B. Freeman;I. Pinnau
通讯作者：
V. Bondar;B. Freeman;I. Pinnau
影响因子：
5.5
作者：
Baijin Zhao;Xiangyang Li;Youju Huang;Yuanhua Cong;Zhe Ma;Chunguang Shao;Haining An;T. Yan;
通讯作者：
Baijin Zhao;Xiangyang Li;Youju Huang;Yuanhua Cong;Zhe Ma;Chunguang Shao;Haining An;T. Yan;
DOI：
10.1002/(sici)1099-0488(19980915)36:12
发表时间：
1998-09
期刊：
Journal of Polymer Science Part B
影响因子：
--
作者：
A. Lustiger;C. Marzinsky;R. Mueller
通讯作者：
A. Lustiger;C. Marzinsky;R. Mueller
影响因子：
5.5
作者：
Haoqing Yang;J. Lei;Liangbin Li;Q. Fu;Zhong‐Ming Li
通讯作者：
Haoqing Yang;J. Lei;Liangbin Li;Q. Fu;Zhong‐Ming Li