𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Role of reaction time in batch process modification of atactic polypropylene by maleic anhydride in melt

✍ Scribed by J. M. García-Martínez; O. Laguna; E. P. Collar

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
406 KB
Volume
65
Category
Article
ISSN
0021-8995

No coin nor oath required. For personal study only.

✦ Synopsis

Following our studies on chemical modification proceses of polypropylenes by maleic anhydride, some new experimental works are shown here that check the possibilities of processing atactic polypropylene in the melt by a batch process. A modified polymer that is supposed to be useful as an interfacial agent if used in heterogeneous systems based on polypropylene is also clearly obtained. The favorable effect of the nonstereoregularity of the polymer can be noted. This polymer has a higher level of modification than the stereoregular polymer ( isotactic polypropylene) , despite the lower processing temperature used that causes a decrease in the initiator activity. Otherwise, this article deals with the role played by the reaction time during the process. A mechanism of chemisorption and some considerations about the fractal nature of the reaction kinetics are proposed to explain the results obtained.

📜 SIMILAR VOLUMES

Functionalization of atactic polypropyle
Functionalization of atactic polypropylene by succinyl-fluorescein: A two-step process of chemical modification in the melt
✍ J. M. García-Martínez; O. Laguna; S. Areso; E. P. Collar 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 183 KB 👁 2 views

Chemical modification of an industrial waste (atactic polypropylene) using a two-step process to obtain a fluorescent-modified polyolefin is the subject of this article. For these purposes, a Box-Wilson statistical experimental design has been used. The product was obtained by a condensation reactio

Grafting of maleic anhydride onto polypr
Grafting of maleic anhydride onto polypropylene by reactive processing. II. Effect of rotor speed and reaction time
✍ S. H. P. Bettini; J. A. M. Agnelli 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 223 KB 👁 1 views

Grafting of maleic anhydride onto polypropylene was performed in a Haake torque rheometer, according to a central composite experimental design, in which four factors were varied: the maleic anhydride and peroxide concentrations, rotor speed, and reaction time. The current article investigates the e

Modification of acrylonitrile–butadiene–
Modification of acrylonitrile–butadiene–styrene terpolymer by grafting with maleic anhydride in the melt. I. Preparation and characterization
✍ Rongrong Qi; Junling Qian; Chixing Zhou 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 93 KB 👁 1 views

## Abstract The graft copolymerization of maleic anhydride (MAH) onto acrylonitrile–butadiene–styrene terpolymer (ABS) was carried out with dicumyl peroxide (DCP) and benzoyl peroxide (BPO) as the binary initiators and with styrene as the comonomer in the molten state. IR spectra confirmed that MAH

Modification of acrylonitrile-butadiene-
Modification of acrylonitrile-butadiene-styrene terpolymer by graft copolymerization with maleic anhydride in the melt. II. Properties and phase behavior
✍ Rongrong Qi; Junling Qian; Zhefeng Chen; Xing Jin; Chixing Zhou 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 187 KB 👁 1 views

## Abstract The graft copolymerization of maleic anhydride (MAH) onto acrylonitrile‐butadiene‐styrene terpolymer (ABS) using dicumyl peroxide and benzoyl peroxide as the binary initiator and styrene as the comonomer in the molten state was described. The properties and phase morphologies of the mod