Influence of the Form II/Form I crystal polymorphism of random copolymers of butene-1 with ethylene or propylene on the peel behavior of peel films

Influence of the Form II/Form I crystal polymorphism of random copolymers of butene-1 with ethylene or propylene on the peel behavior of peel films
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1 丁烯与乙烯或丙烯无规共聚物的 II 型/I 型晶型对剥离膜剥离行为的影响

DOI:
10.1002/pen.24013
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发表时间:
--
影响因子:
3.2
通讯作者:
Grellmann
Grellmann
中科院分区:
工程技术4区
文献类型:
--
作者:
Androsch;Henning;Grellmann

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研究了低密度聚乙烯(LDPE)共混物和丁烯- 1与乙烯(iPB - Eth)或丙烯(iPB - Prop)随机等规共聚物共混物的剥离膜,研究了共聚物组成对共聚物II型中间相到I型晶体转变的影响,以及它们与LDPE共混物在剥离膜中随时间变化的剥离行为。总的来说,在完成形式II到形式I的转变后,随机iPB - 1基共聚物及其与LDPE共混物中,随着乙烯和丙烯co - units浓度的增加,剥离力降低。因此,为了调整剥离力,可以改变共混物中剥离组分的含量,或剥离组分中乙烯或丙烯co - units的浓度。无规共聚物中乙烯共聚物对剥离力的影响明显大于丙烯共聚物。与丁烯- 1基共聚物的形式II到形式I的转变平行,剥离力随共聚物组成的速率而降低。在相同co - units浓度的iPB - Eth共聚物中,iPB - Prop共聚物的Form II到Form I的转变速度明显快于iPB - Eth共聚物。变异较大。ENG。科学。中文信息学报,55:1749-1757,2015。©2014美国塑料工程师学会
Peel films of blends of low density polyethylene (LDPE) and random isotactic copolymers of butene‐1 with either ethylene (iPB‐Eth) or propylene (iPB‐Prop) were investigated regarding the effect of the copolymer composition on both the Form II mesophase to Form I crystal transformation of the copolymers, and the time‐dependent peel behavior of their blends with LDPE in peel films. In general, there is observed a decrease of the peel force with increasing concentration of both ethylene and propylene co‐units in random iPB‐1 based copolymers and their blends with LDPE, after completion of the Form II to Form I transformation. Thus, to tailor the peel force, either the content of the peel component in the blends, or the concentration of ethylene or propylene co‐units in the peel component may be varied. The effect of ethylene co‐units in the random copolymers on the peel force is distinctly larger than that of propylene co‐units. Parallel to the Form II to Form I transition of butene‐1 based copolymers, the peel force decreases with a rate which depends on the copolymer composition. The Form II to Form I transition in iPB‐Prop copolymers proceeds distinctly faster than in iPB‐Eth copolymers of identical concentration of co‐units. POLYM. ENG. SCI., 55:1749–1757, 2015. © 2014 Society of Plastics Engineers
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DOI: --
发表时间: 2008
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