研究了在120 ℃等温结晶30 min的条件下,庚二酸/硬脂酸钙组成比对等规聚丙烯中β晶型含量的影响,发现在0.15%(质量分数)庚二酸用量下,随着硬脂酸钙用量的增加,β晶型含量不断增大,硬脂酸钙用量在0.35%(质量分数)以上时,才能生成较高纯度的β晶型聚丙烯,说明iPP和双组分成核剂熔体混合时,庚二酸和硬脂酸钙可能"就地"发生化学反应,生成高效β晶型成核剂--庚二酸钙.还研究了在0.15%庚二酸/0.5%硬脂酸钙固定组成比下,等温结晶温度(100 ℃～140 ℃)对iPP中β晶型含量的影响,发现在130 ℃～140 ℃之间发生β→α晶型转变.
参考文献
| [1] | 窦强.聚丙烯/碳酸钙复合材料中β晶型聚丙烯的生成及其作用[J].中国塑料,2006(01):6-11. |
| [2] | 张晓东;史观一.[J].高分子学报,1992(03):293-297. |
| [3] | ZHANG X D;SHI G Y .[J].Polymer,1994,35(23):5067-5072. |
| [4] | Tjong SC.;Li RKY.;Shen JS. .MORPHOLOGICAL BEHAVIOUR AND INSTRUMENTED DART IMPACT PROPERTIES OF BETA-CRYSTALLINE-PHASE[J].Polymer: The International Journal for the Science and Technology of Polymers,1996(12):2309-2316. |
| [5] | Trongtorsak K;Supaphol P;Tantayanon S .Effect of calcium stearate and pimelic acid addition on mechanical properties of heterophasic isotactic polypropylene/ethylene-propylene rubber blend[J].Polymer Testing,2004(5):533-539. |
| [6] | STERZYNSKI T;OYSAED H .[J].Polymer Engineering and Science,2004,44(02):352-361. |
| [7] | LI J X;CHEUNG W L;JIA D M .[J].Polymer,1999,40:1219-1222. |
| [8] | Li JX.;Cheung WL. .On the deformation mechanisms of beta-polypropylene: 1. Effect of necking on beta-phase PP crystals[J].Polymer: The International Journal for the Science and Technology of Polymers,1998(26):6935-6940. |
| [9] | Varga J. .beta-modification of isotactic polypropylene: Preparation, structure, processing, properties, and application[J].Journal of Macromolecular Science. Physics,2002(4/6):1121-1171. |
| [10] | TURNER-JONES A;AIZLEWOOD J M;BECKETT D R .[J].MAKROMOLEKULARE CHEMIE,1964,75:134-158. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%