A STUDY ON α-γ TRANSFORMATION OF ETHYLENE-PROPYLENE COPOLYMERS AND MIXTURES

ZHANG Hong-fang; MO Zhi-shen; LI San-xi; Pang De-ren; HUANG Bao-tong

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A STUDY ON α-γ TRANSFORMATION OF ETHYLENE-PROPYLENE COPOLYMERS AND MIXTURES

Research Article | 更新时间：2021-03-19

- A STUDY ON α-γ TRANSFORMATION OF ETHYLENE-PROPYLENE COPOLYMERS AND MIXTURES
- Acta Polymerica Sinica Issue 4, Pages: 453-458(1990)
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- Published：20 August 1990，
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ZHANG Hong-fang, MO Zhi-shen, LI San-xi, Pang De-ren, HUANG Bao-tong. A STUDY ON α-γ TRANSFORMATION OF ETHYLENE-PROPYLENE COPOLYMERS AND MIXTURES. [J]. Acta Polymerica Sinica (4):453-458(1990)
DOI：

ZHANG Hong-fang, MO Zhi-shen, LI San-xi, Pang De-ren, HUANG Bao-tong. A STUDY ON α-γ TRANSFORMATION OF ETHYLENE-PROPYLENE COPOLYMERS AND MIXTURES. [J]. Acta Polymerica Sinica (4):453-458(1990) DOI：

摘要

用广角X-射线衍射(WAXD)和偏光显微镜(PLM)方法

研究了具有乙丙长序列乙丙共聚物及其共混物

发现通过熔融慢冷结晶样品

C3含量在30mol％以上

衍射角2θ=20°处出现了属于γ-PP晶型的(140)

(130)晶面衍射。含有乙丙长序列链结构的乙丙共聚物及共混物属(α+γ)混晶结构;含乙丙长序列的EPR以γ-相为主

嵌段物和共混物则以α-PP为主

形成γ-PP结构的必要条件是含有乙丙长序列链结构样品熔融慢冷结晶。

Abstract

Ethylene (E)-Propylene (P) copolymers and mixtures with long E-P sequence structures were investigated using WAXD and PLM methods. As the content of Cs reached more than 30 mol %

the (140)

(130) crystal planes appear at 2θ = 20 in X-ray diffraction patterns of me-Itcrystallized samples. Planes of (140)

(130) are the characteristics of γ-form

which originate from (a +γ) form in E-P copolymers.γ-form is mainly observed for long E-P sequence copolymers as slow cooling

but a-form is mainly for blocks and mixtures.

关键词

乙丙共聚物α-γ相转变嵌段物和共混物广角X-射线衍射

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