Octene-propylene copolymer

Figure 19 (a) Peak melting temperature as a function of the branch content in ethylene-octene copolymers (labelled -O, and symbol —B (symbol, ) and -P (symbol, A) are for ethylene-butene and ethylene-propylene copolymers, respectively) and obtained from homogeneous metallocene catalysts show a linear profile, (b) Ziegler-Natta ethylene-octene copolymers do not show a linear relationship between peak melting point and branch content [125]. Reproduced from Kim and Phillips [125]. Reprinted with permission of John Wiley Sons, Inc. 

Ethylene-Propylene Copolymer and Ethylene-Octene-1 Copolymer... 

Melt compounding is most commonly utilized for the preparation of PO/silica nanocomposites. POs and their blends, such as PP [326-337], PE [338-343], ethylene-propylene copolymer [344-354], ethylene-octene copolymer [347], thermoplastic POs [348-350], PP/ EPDM [351,352], and PP/liquid-crystalline polymer (LCP) [353-357] blends, have been used as the matrices in the preparation of PO/silica nanosystems and nanomaterials by twin-screw extrusion and injection molding or lab-scale single-screw extrusion and compression molding. 

Thermoplastic polyolefin (TPO) is a generic name that refers to polyolefin blends usually consisting of some fraction of polypropylene (PP), polyethylene (PE) or polypropylene block copolymer (PP-b-EP or BCPP ), and a thermoplastic olefinic rubber, with or without a mineral reinforcing filler such as talc or wollastonite. Common rubbers include ethylene propylene rubber (EPR), EPDM rubber, ethylene-octene (EO) copolymer mbber, ethylene-butadiene (EB), and styrene-ethylene-butadiene-styrene (SEBS) block copolymer rubbers. Currently, there are a great variety of commercial polypropylene homopolymers, PP block copolymers, and olefinic rubbers available to make a wide range of TPO blends with densities ranging from 0.92 to 1.1. 

An in-reactor TPO may be defined as a reactor-produced polypropylene copolymer (PP-b-E/P), containing between 22 % and 55 % ethylene-propylene copolymer blocks. Small amounts of other comonomers, such as octene-1 or butene-1, may also be present so as to provide unique functionality. In-reactor propylene block copolymers containing less than 20 % ethylene are fairly hard and are usually classified as impact polypropylenes. Reactor-made polymers containing >50 % ethylene are soft and also have relatively poor elastomeric properties - these are classified as plastomers. 

Fig. 39 Effect of comonomer type on cocrystallization at a cooling rate of 0.1 °C/min for blends with the same comonomer type. BPED blend of ethylene/1-dodecene copolymers, BPEO blend of ethylene/l-octene copolymers BPEH blend of ethylene/1-hexene copolymers, BPEP blend of ethjdene/propylene copolymers [67]...

Homo- and copolymerlzation of ethylene are receiving considerable attention In the present decade, due to different reasons polyethylene Is the world s most used polymer low linear density polyethylene (LLDPE) produced by copolymerization of ethylene with high a-olefins, such as 1-butene, 1-hexene, 1-octene, etc.. Is one of the most rapidly growing polymers possibilities of producing different types of ethylene-propylene copolymers, such as random and block copolymers, etc. 

Some data have been published on the copolymers of propylene with different linear high olefins 33,40). The main method of analysis is based on the 720 cm band absorbance in the IR spectra (calibration with homopolymer blends). For propylene-butene-1-octene-l copolymers the dependance is (33) ... 

Figure 3.8 (a) Melting temperature TJ of rapidly crystallised fractions of PE-based copolymers as determined by DSC. A hydrogenated polybutadiene with ethyl groups ethylene-vinyl acetate copolymer diazoalkane copolymer with propyl side groups X ethylene-1-butene copolymer ethylene-1-octene copolymer, (b) Melting temperature (TJ of branched LDPE. 1 ethylene-propylene copolymer 2 ethylene-1-bntene copolymer 3 branched PE [23]... 

Some specific recent applications of the GC-MS technique to various types of polymers include the following PE [49,50], poly(l-octene) [51], poly(l-decene) [51], poly(l-dodecene) [51], 1-octene-l-decene-l-dodecene terpolymer [51], chlorinated polyethylene [52], polyolefins [53, 54], acrylic acid methacrylic acid copolymers [55], polyacrylates [56], styrene-butadiene and other rubbers [57-59], nitrile rubber [60], natural rubbers [61, 62], chlorinated natural rubber [63, 64], polychloroprene [65], PVC [66-68], silicones [69, 70], polycarbonates [71], styrene-isoprene copolymers [72], substituted PS [73], polypropylene carbonate [74], ethylene-vinyl acetate copolymers [75], Nylon [76], polyisopropenyl cyclohexane a-methyl styrene copolymers [77], m-cresol-novolac epoxy resins [78], polymeric flame retardants [79], poly(4-N-alkyl styrenes) [80], polyvinyl pyrrolidone [81], vinyl pyrrolidone-methyl acryloxysilicone copolymers [82], polybutylcyanoacrylate [83], polysulfide copolymers [84], poly(diethyl-2-methacryloxy)ethyl phosphate [85], ethane-carbon monoxide copolymers [86], polyetherimide [87], bisphenol A [88], ethyl styrene [89], styrene-isoprene block copolymer [89], polyvinyl alcohol-co-vinyl acetate [90], epoxide thiol [91], maleic acid-propylene copolymer [92], P-hydroxy butyrate-P-hydroxy valerate copolymer [93], polycaprolactams [39,94], PS [95,96], polypyrrole [95,96], polyhydroxy alkanoates [97], poly(p-chloromethyl) styrene [81], polybenzooxazines and siloxy substituted polyoxadisila-pentanylenes [98,99] poly benzyl methacrylates [100], polyolefin blends after ageing in soil [101] and polystyrene peroxide [43]. 

The commercial production of LLDPE relies on copolymetiza-tion with a-olefins such as 1-butene, 1-hexene, 1-oaene, and, to a smaller degree, 4-methyl-l-pentene. Prop ylene is not employed for LLDPE because the relatively small and sparse methyl groups of ethylene/propylene copolymers are accommodated in the crystal and are far inferior to butyl and hexyl groups (from 1-hexene and 1-octene, respertively) for the improvement of mechanical properties. Very long a-olefins, such as 1 -hexadecene, have been investigated for creating specialized LLDPE that shares properties with commercial LDPE made via free radical polymerization. ... 

Ethylene-propylene copolymers are important materials and are discussed in sections 2.7 and 2.8. Copolymers containing small amounts of a-olefins such as 1-butene, 1-hexene and 1-octene are normally referred to as linear low density polyethylene and are described in section 2.3. 

E-plastomers, based on ethylene and its copolymers with alpha olefins such as propylene or octene, combine the desirable attributes of processibUity, economy, and resistance to environmental degradation [20]. These properties, in conjunction with excellent elastomeric attributes such as... 

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